docker history
In 2010, several young people set up dotcloud in the United States to do some pass cloud services.
lxc related container technology, they container their own technology
Talk about docker
Docker is developed based on GO language! Open source project!
Official website: https://www.docker.com/
Document address: https://docs.docker.com/ Super detailed
Warehouse address: https://hub.docker.com/
What can docker do
Previous virtual technology
Disadvantages of virtual technology
- Occupy more resources
- Redundant steps
- Slow start
Containerization Technology
Containerization technology is not a complete operating system for simulation
The difference between Docker and virtual machine
- Traditional virtual machines create a complete set of hardware, run a complete set of virtual environment, and run and install software on the operating system
- The container runs directly in the kernel. The container does not have its own kernel or virtual hardware, so it is lightweight
- Each container is isolated from each other. Each container has its own file system and does not affect each other
Devops (development, operation and maintenance)
Faster operation and maintenance deployment
Traditional applications: a pile of documents, installation and operation
Docker: packaging image release test, one click operation
More convenient upgrade and capacity expansion
After using docker, publishing applications is like building blocks
The project is packaged as a mirror and can be run directly in other environments
Simpler operation and maintenance
After containerization, the development environment and test environment are highly consistent
More efficient resource utilization
Docker is kernel virtualization. Multiple container instances can be run on one physical machine, and the server performance can be squeezed to the extreme
Installation of Docker
Basic composition of Docker
Images
Docker image is a template through which container services can be created. Tomcat - > Run - > tomcat01 container (providing server). Multiple containers can be created through this image
Container
Docker uses container technology to run applications created through images
Start and delete basic commands
Repository
A place to store images!
Shared warehouse and private warehouse!
Docker hub (foreign by default)
Alibaba cloud... All have these warehouses (configure image acceleration)
Install Docker
Environmental preparation
- A little basic knowledge of linux
- CentOS 7
- Linking remote servers using XShell
Environment view
#System kernel above 3.10 [root@izuf6cn5k7l8xuxojhszqbz ~]# uname -r 3.10.0-862.14.4.el7.x86_64
#System version [root@izuf6cn5k7l8xuxojhszqbz /]# cat /etc/os-release NAME="CentOS Linux" VERSION="7 (Core)" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="7" PRETTY_NAME="CentOS Linux 7 (Core)" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:centos:centos:7" HOME_URL="https://www.centos.org/" BUG_REPORT_URL="https://bugs.centos.org/" CENTOS_MANTISBT_PROJECT="CentOS-7" CENTOS_MANTISBT_PROJECT_VERSION="7" REDHAT_SUPPORT_PRODUCT="centos" REDHAT_SUPPORT_PRODUCT_VERSION="7"
install
Help documentation: https://docs.docker.com/engine/install/centos/
# 1. Uninstall the old version
yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
# 2. Download the required installation package
yum install -y yum-utils
# 3. Set image warehouse
yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo # defaults to foreign ones, which are very slow
yum-config-manager
--add-repo \
http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo # recommends Alibaba cloud
# Update yum related index
yum makecache faste
# 4. Install Docker related content Docker CE Community Edition ee Enterprise Edition
yum install docker-ce docker-ce-cli containerd.io
# 5. Start docker
sudo systemctl start docker
# 6. Use docker version to check whether the installation is successful
# 7. hello-world docker run hello-world
# 8. View the downloaded Hello world image [root@izuf6cn5k7l8xuxojhszqbz /]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE redis latest 235592615444 4 months ago 104MB mysql 5.7 9cfcce23593a 4 months ago 448MB hello-world latest fce289e99eb9 21 months ago 1.84kB logstash 6.4.0 13b7a09abaf8 2 years ago 670MB kibana 6.4.0 a7e4cd1a7b45 2 years ago 667MB elasticsearch 6.4.0 1ac676545731 2 years ago 791MB
Learn about uninstalling docker
# 1. Uninstall dependency yum remove docker-ce docker-ce-cli containerd.io # 2. Delete resources rm -rf /var/lib/docker #/Default working path of var/lib/docker docker
Alibaba cloud image acceleration
-
Log in to alicloud and find the container service
-
Image acceleration address
-
Configuration use
sudo mkdir -p /etc/docker sudo tee /etc/docker/daemon.json <<-'EOF' { "registry-mirrors": ["https://0b56c32l.mirror.aliyuncs.com"] } EOF sudo systemctl daemon-reload sudo systemctl restart docker
Review Hello World
Underlying principle
Docker is a client server system. The daemon of docker runs on the host and is accessed from the client through Socket
DockerServer accepts DockerClient commands
Why does Docker run faster than VM?
- Docker has fewer abstraction layers than virtual machines
- Docker uses the kernel of the host
Common commands of Docker
Help command
docker version # Display Docker version information docker info # Displays the system information of Docker, including the number of images and containers docker command --help # Help command
Help document address: https://docs.docker.com/engine/reference/run/
Mirror command
[root@izuf6cn5k7l8xuxojhszqbz ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE redis latest 235592615444 4 months ago 104MB mysql 5.7 9cfcce23593a 4 months ago 448MB hello-world latest fce289e99eb9 21 months ago 1.84kB logstash 6.4.0 13b7a09abaf8 2 years ago 670MB kibana 6.4.0 a7e4cd1a7b45 2 years ago 667MB elasticsearch 6.4.0 1ac676545731 2 years ago 791MB # explain REPOSITORY Mirror warehouse source TAG Mirror label IMAGE ID image ID CREATE Image creation time SIZE Mirror size # Optional direction Options: -a, --all # List all mirrors -q, --quiet # Show only mirror ID
docker search search image
[root@izuf6cn5k7l8xuxojhszqbz ~]# docker search mysql NAME DESCRIPTION STARS OFFICIAL AUTOMATED mysql MySQL is a widely used, open-source relation... 10075 [OK] mariadb MariaDB is a community-developed fork of MyS... 3694 [OK] mysql/mysql-server Optimized MySQL Server Docker images. Create... 736 [OK] percona Percona Server is a fork of the MySQL relati... 511 [OK] # Optional [root@izuf6cn5k7l8xuxojhszqbz ~]# docker search mysql NAME DESCRIPTION STARS OFFICIAL AUTOMATED mysql MySQL is a widely used, open-source relation... 10075 [OK] mariadb MariaDB is a community-developed fork of MyS... 3694 [OK] mysql/mysql-server Optimized MySQL Server Docker images. Create... 736 [OK] percona Percona Server is a fork of the MySQL relati... 511 [OK] [root@izuf6cn5k7l8xuxojhszqbz ~]# docker search mysql --filter=stars=5000 NAME DESCRIPTION STARS OFFICIAL AUTOMATED mysql MySQL is a widely used, open-source relation... 10075 [OK]
docker pull Download Image
# docker pull image name [: tag] docker pull mysql [root@izuf6cn5k7l8xuxojhszqbz ~]# docker pull mysql Using default tag: latest # If you do not write tag, the default is latest latest: Pulling from library/mysql bb79b6b2107f: Pull complete # Layered download, the core of docker images, federated file system 49e22f6fb9f7: Pull complete 842b1255668c: Pull complete 9f48d1f43000: Pull complete c693f0615bce: Pull complete 8a621b9dbed2: Pull complete 0807d32aef13: Pull complete 9eb4355ba450: Pull complete 6879faad3b6c: Pull complete 164ef92f3887: Pull complete 6e4a6e666228: Pull complete d45dea7731ad: Pull complete Digest: sha256:86b7c83e24c824163927db1016d5ab153a9a04358951be8b236171286e3289a4 #autograph Status: Downloaded newer image for mysql:latest docker.io/library/mysql:latest # Real address
Delete image docker rmi
docker rmi -f 8e85dd5c3255 # Delete the specified image
docker rmi -f container ID container ID container ID container ID# Delete multiple mirrors
docker rmi -f ${docker images -aq} # Delete all mirrors
Container command
Note: you can only create a container by creating a new image. For Linux, download a CentOS to learn
docker pull centos
Create a new container and start
docker run [Optional parameters] image
# Parameter description
--name # Specify container name
-it # Use the interactive method to view the content in the background
-d # Background operation
-p # Specify port 8080:8080
-p Host port:Container port(Mapping of the most commonly used host port and container port)
-p ip:Host port:Container port
-p Container port
Container port
-P # Randomly assigned ports
# Test, start and enter the container
[root@izuf6cn5k7l8xuxojhszqbz /]# docker run -it kibana:6.4.0 /bin/bash
bash-4.2$ [root@izuf6cn5k7l8xuxojhszqbz /]#
[root@izuf6cn5k7l8xuxojhszqbz /]# docker run -it centos /bin/bash
# Check the CentOS in the container. Many functions of the basic version are not perfect
[root@a87299a142d9 /]# ls
bin dev etc home lib lib64 lost+found media mnt opt proc root run sbin srv sys tmp usr var
# Return the host from the container
[root@a87299a142d9 /]# exit
exit
[root@izuf6cn5k7l8xuxojhszqbz /]# ls
bin dev get-docker.sh ifstat-1.1.tar.gz lost+found mydata root srv usr
boot dubbo-governance.log home lib media opt run sys var
d etc ifstat-1.1 lib64 mnt proc sbin tmp zookeeper.out
[root@izuf6cn5k7l8xuxojhszqbz /]#
# View image metadata
[root@izuf6cn5k7l8xuxojhszqbz /]# docker inspect b96481cf196e
[
{
"Id": "b96481cf196efa193fd2981636b7d1a71ea7a7379ce46b5b603b6520c05c1386",
"Created": "2020-10-20T01:00:24.252614556Z",
"Path": "/bin/bash",
"Args": [],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 12492,
"ExitCode": 0,
"Error": "",
"StartedAt": "2020-10-20T02:00:50.534736639Z",
"FinishedAt": "2020-10-20T02:00:50.11175616Z"
},
"Image": "sha256:0d120b6ccaa8c5e149176798b3501d4dd1885f961922497cd0abef155c869566",
"ResolvConfPath": "/var/lib/docker/containers/b96481cf196efa193fd2981636b7d1a71ea7a7379ce46b5b603b6520c05c1386/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/b96481cf196efa193fd2981636b7d1a71ea7a7379ce46b5b603b6520c05c1386/hostname",
"HostsPath": "/var/lib/docker/containers/b96481cf196efa193fd2981636b7d1a71ea7a7379ce46b5b603b6520c05c1386/hosts",
"LogPath": "/var/lib/docker/containers/b96481cf196efa193fd2981636b7d1a71ea7a7379ce46b5b603b6520c05c1386/b96481cf196efa193fd2981636b7d1a71ea7a7379ce46b5b603b6520c05c1386-json.log",
"Name": "/xenodochial_cerf",
"RestartCount": 0,
"Driver": "overlay2",
"Platform": "linux",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {},
"RestartPolicy": {
"Name": "no",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": null,
"CapAdd": null,
"CapDrop": null,
"Capabilities": null,
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "private",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"NanoCpus": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": [],
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpuRealtimePeriod": 0,
"CpuRealtimeRuntime": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"DeviceCgroupRules": null,
"DeviceRequests": null,
"KernelMemory": 0,
"KernelMemoryTCP": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": null,
"OomKillDisable": false,
"PidsLimit": null,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0,
"MaskedPaths": [
"/proc/asound",
"/proc/acpi",
"/proc/kcore",
"/proc/keys",
"/proc/latency_stats",
"/proc/timer_list",
"/proc/timer_stats",
"/proc/sched_debug",
"/proc/scsi",
"/sys/firmware"
],
"ReadonlyPaths": [
"/proc/bus",
"/proc/fs",
"/proc/irq",
"/proc/sys",
"/proc/sysrq-trigger"
]
},
"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/0ee9111d7dc3c174492b9aa2f3254982ed4b5f42ce5afb7d95cde986ef4472d5-init/diff:/var/lib/docker/overlay2/e88cb8fc7bd56dd63cbb631a8babb55716e65fb3705e0e5c2e0d5da2e6e7737b/diff",
"MergedDir": "/var/lib/docker/overlay2/0ee9111d7dc3c174492b9aa2f3254982ed4b5f42ce5afb7d95cde986ef4472d5/merged",
"UpperDir": "/var/lib/docker/overlay2/0ee9111d7dc3c174492b9aa2f3254982ed4b5f42ce5afb7d95cde986ef4472d5/diff",
"WorkDir": "/var/lib/docker/overlay2/0ee9111d7dc3c174492b9aa2f3254982ed4b5f42ce5afb7d95cde986ef4472d5/work"
},
"Name": "overlay2"
},
"Mounts": [],
"Config": {
"Hostname": "b96481cf196e",
"Domainname": "",
"User": "",
"AttachStdin": true,
"AttachStdout": true,
"AttachStderr": true,
"Tty": true,
"OpenStdin": true,
"StdinOnce": true,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/bash"
],
"Image": "centos",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"org.label-schema.build-date": "20200809",
"org.label-schema.license": "GPLv2",
"org.label-schema.name": "CentOS Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.vendor": "CentOS"
}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "2e09d9086aeb52e6a6d5a7ada9b6c8531c0f7b322ccf6532cf169d3ba9756eab",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {},
"SandboxKey": "/var/run/docker/netns/2e09d9086aeb",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "63ef5e1ec21bc8973355b716d8dfa42e192efc0f1750ef18947b4f9d1410e512",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.4",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:04",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "adb8cb6caa43e42b2f3963607bf576207abb4a6a2b76c43f3907503f17dbdad9",
"EndpointID": "63ef5e1ec21bc8973355b716d8dfa42e192efc0f1750ef18947b4f9d1410e512",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.4",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:04",
"DriverOpts": null
}
}
}
}
]
[root@izuf6cn5k7l8xuxojhszqbz /]#
Exit container
exit # Exit and stop the container ctrl + P + Q # Exit without stopping the container
List all Docker running containers
docker ps # parameter No parameters # Lists currently running containers -a # List currently running containers + historically running containers -n=? # Displays recently created containers -q # Displays only the number of the container
Delete container
docker rm container ID # Delete the container, but cannot delete the running container. If rm -f is forcibly deleted
docker rm -f ${docker ps -qa} # Delete all containers
docker ps -qa | xargs docker rm # Delete all containers
Start and stop containers
docker start container ID # Start container docker restart container ID # Restart container docker stop container ID # Stop container docker kill container ID # Force stop of current container
Common other commands
Docker process related commands
systemctl start docker # Start Docker container systemctl stop docker # Stop Docker container systemctl restart docker # Restart Docker container systemctl status docker # View Docker container status systemctl enable docker # Set Docker to start automatically docker top container ID # View container process information [root@izuf6cn5k7l8xuxojhszqbz /]# docker top 0a01905d64f5 UID PID PPID C STIME TTY TIME CMD root 16217 16201 0 12:21 pts/0 00:00:00 /bin/bash [root@izuf6cn5k7l8xuxojhszqbz /]#
Background start command
# docker run -d image name # Problem docker ps found that CentOS stopped running # There must be a foreground process for docker to run in the background. If docker finds no application, it will stop automatically # nginx will stop running when it finds that it does not provide services, that is, there is no program
View log command
docker logs -f -t --tail nubmer container ID # Show log - ft # Show log --tail number # Show logs and rows [root@izuf6cn5k7l8xuxojhszqbz /]# docker logs -f -t --tail 10 d50135d540e2
Enter the currently running container
# Usually, the container runs in the background. It is often necessary to enter the container and modify some configurations # Mode 1 docker exec -it container ID [root@izuf6cn5k7l8xuxojhszqbz ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES bc3159d51302 kibana:6.4.0 "/bin/bash" 34 minutes ago Up 34 minutes 5601/tcp romantic_euclid abe8d2653a16 elasticsearch:6.4.0 "/usr/local/bin/dock..." 35 minutes ago Up 35 minutes 9200/tcp, 9300/tcp elastic_ellis 89059be6a599 logstash:6.4.0 "/usr/local/bin/dock..." 36 minutes ago Up 36 minutes 5044/tcp, 9600/tcp nostalgic_einstein 059363cf2047 0346349a1a64 "/bin/bash" 46 minutes ago Up 46 minutes 80/tcp, 443/tcp nginx edb16178fcae centos "/bin/bash" About an hour ago Up About an hour nostalgic_allen a956dc76e579 redis "docker-entrypoint.s..." 3 months ago Up About an hour 0.0.0.0:6379->6379/tcp redis 635d1b7ad286 mysql:5.7 "docker-entrypoint.s..." 3 months ago Up About an hour 0.0.0.0:3306->3306/tcp, 33060/tcp mysql [root@izuf6cn5k7l8xuxojhszqbz ~]# docker exec -it 635d1b7ad286 /bin/bash root@635d1b7ad286:/# # Mode 2 docker attach container ID # Enter container [root@izuf6cn5k7l8xuxojhszqbz /]# docker attach 635d1b7ad286 [root@izuf6cn5k7l8xuxojhszqbz /]# ... # The difference between the two methods docker exec -it container ID # Enter the container and open a new terminal docker attach container ID # Entering the executing terminal will not start a new process
Copy files from container to host
docker cp # Enter the docker container [root@izuf6cn5k7l8xuxojhszqbz /]# docker exec -it edb16178fcae /bin/bash [root@edb16178fcae /]# cd /home [root@edb16178fcae home]# ls # Create home file in container [root@edb16178fcae home]# touch test.java # Exit container [root@edb16178fcae home]# exit exit [root@izuf6cn5k7l8xuxojhszqbz /]# ls bin d dubbo-governance.log get-docker.sh ifstat-1.1 lib lost+found mnt opt root sbin sys usr zookeeper.out boot dev etc home ifstat-1.1.tar.gz lib64 media mydata proc run srv tmp var # Copy the files created in docker to the host directory [root@izuf6cn5k7l8xuxojhszqbz /]# docker cp edb16178fcae:/home/test.java /home [root@izuf6cn5k7l8xuxojhszqbz /]# cd home [root@izuf6cn5k7l8xuxojhszqbz home]# ls admin es FastDFS hadoop mysql oracle test.java [root@izuf6cn5k7l8xuxojhszqbz home]# # Copying is a manual process. In the future, the technical field of - v volume can be used to associate the container directory with the host directory / home /home
summary
Practice
Docker installation Ninx
# docker search nginx # Search image # docker pull nginx:1.1.0 # Download the specified version image # View mirror [root@izuf6cn5k7l8xuxojhszqbz /]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos latest 0d120b6ccaa8 2 months ago 215MB redis latest 235592615444 4 months ago 104MB mysql 5.7 9cfcce23593a 4 months ago 448MB rabbitmq 3.7.15-management f05c3eb3cf91 15 months ago 179MB hello-world latest fce289e99eb9 21 months ago 1.84kB mongo 3.2 fb885d89ea5c 23 months ago 300MB logstash 6.4.0 13b7a09abaf8 2 years ago 670MB kibana 6.4.0 a7e4cd1a7b45 2 years ago 667MB elasticsearch 6.4.0 1ac676545731 2 years ago 791MB nginx 1.10 0346349a1a64 3 years ago 182MB # Parameter interpretation # -d Background operation # --name Name the container # -p Host port: container port [root@izuf6cn5k7l8xuxojhszqbz /]# docker run -d --name ngnix01 -p 3344:80 nginx:1.10 fe9479484c55a8aa62719a65cf146c14ce9bfadf5e20090afcb8e38703ac2bec [root@izuf6cn5k7l8xuxojhszqbz /]# curl localhost:3344 # Enter container [root@izuf6cn5k7l8xuxojhszqbz /]# docker exec -it ngnix01 /bin/bash root@fe9479484c55:/# whereis nginx nginx: /usr/sbin/nginx /usr/lib/nginx /etc/nginx /usr/share/nginx /usr/share/man/man8/nginx.8.gz /usr/share/man/man3/nginx.3pm.gz root@fe9479484c55:/# cd /etc/nginx root@fe9479484c55:/etc/nginx# ls conf.d fastcgi_params koi-utf koi-win mime.types modules nginx.conf scgi_params uwsgi_params win-utf root@fe9479484c55:/etc/nginx#
Docker installing Tomcat
# Docker pull Tomcat: Download Image Tomcat 9.0 [root@izuf6cn5k7l8xuxojhszqbz /]# docker run -d --name tomcat9 -p 3355:8080 tomcat:9.0 [root@izuf6cn5k7l8xuxojhszqbz /]# docker exec -it tomcat9 /bin/bash root@5f17e0823840:/usr/local/tomcat# ls BUILDING.txt LICENSE README.md RUNNING.txt conf logs temp webapps.dist CONTRIBUTING.md NOTICE RELEASE-NOTES bin lib native-jni-lib webapps work root@5f17e0823840:/usr/local/tomcat# cd webapps root@5f17e0823840:/usr/local/tomcat/webapps# ls root@5f17e0823840:/usr/local/tomcat/webapps#
Docker installation Es+kibana
# Multiple ES exposed ports # ES consumes a lot of memory # Generally, the directory of ES should be stored and mounted in a safe directory # --net somenetwork network configuration docker run -d --name elasticsearch -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:tag # View docker stats docker run -d --name elasticsearch -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" -e ES_JAVA_OPS="-Xms64m -Xms512m" elasticsearch:tag
visualization
-
Portal (use this first)
docker run -d -p 8088:9000 \ --restart=always -v /var/run/docker.sock:/var/run/docker.sock --privileged=true portainer/portainer
-
Rancher(CI/CD reuse)
docker image
commit image
docker commit Submit the container as a new copy # The principle of the command is similar to that of git docker commit -m="Submit description information" -a="author" container ID Target image:[TAG] docker commit -a="steven" -m="add webapps app" 5f17e0823840 tomcat02:1.0.0
Container data volume
Data volume usage
Method 1: use the command to mount - v
docker run -d -it -v Host Directory:Container directory -p Host port:Container port --name Container name [root@izuf6cn5k7l8xuxojhszqbz home]# docker run -it -v /home/ceshi:/home centos /bin/bash
Test file synchronization
Benefit modification only needs to be modified in the host, and the container will be automatically synchronized
Install MySQL
# Get image [root@izuf6cn5k7l8xuxojhszqbz /]# docker pull mysql:5.7 # The running container needs to be mounted!#To install and start MySQL, you need to set a password. Pay attention to it # Start MySQL -d Background operation -p Port mapping -v Data volume mount -e Environment configuration --name Container name [root@izuf6cn5k7l8xuxojhszqbz /]# docker run -d -p 3306:3306 -v /home/mysql/conf:/etc/mysql/conf.d -v /home/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=09091995aq --name mysql5.7 mysql:5.7 # After successful startup, test with Navicat link # Create a database locally and view the mapping path
Named and anonymous mount
# Anonymous mount # -v view path in container docker run -d --name nginx01 -v /etc/nginx nginx # View volume [root@izuf6cn5k7l8xuxojhszqbz /]# docker volume ls DRIVER VOLUME NAME local 843c675d3d847a6c57927c79a5886559482bf4916118f91627bfa35ebbbec45b # This is anonymous mount -v, which only writes the path in the container, not the host path # Named mount [root@izuf6cn5k7l8xuxojhszqbz /]# docker run -d --name nginx1.10 -p 3344:80 -v juming_nginx:/etc/nginx nginx:1.10 1c70f133efdc35f9ce52ddafc7e128d88e833290e3815e2c8f1e5c2699319eb7 [root@izuf6cn5k7l8xuxojhszqbz /]# docker volume ls DRIVER VOLUME NAME local juming_nginx
If no directory is specified, all dockers are placed in: / var / lib / docker / volumes / xxx by default/_ Data directory
# Named mount, anonymous mount, specified directory mount -v In container path # Anonymous mount -v Container name:/Path in container # Named mount -v Host path::/Path in container # Specified path mount
expand
# Control read and write permissions through -v paths in the container # ro readonly read only # rw readwrite docker run -d --name nginx1.10 -p 3344:80 -v juming_nginx:/etc/nginx:ro nginx:1.10 docker run -d --name nginx1.10 -p 3344:80 -v juming_nginx:/etc/nginx:rw nginx:1.10 # ro can only modify the configuration through the host, which cannot be changed in the container
First acquaintance with DockerFile
DockerFile build Docker image file! Command script experience
# Create a DockerFile file with any name. It is recommended to use dockefile # Content instruction (uppercase) parameter in file FROM centos VOLUME ['volume01','volume02'] CMD echo '-----------end-------------' CMD /bin/bash # Each command here is a layer of docker image
Start your own image
Viewing the volume hanging on the path: docker inspect container ID
Data volume container
Multiple MySQL synchronization data
docker run -it --name Container name --volumes-from Parent container name image name:Version number docker run -it --name docker02 --volumes-from docker01 stevenyin/centos:1.10
DockerFile
DockerFile introduction
DockerFile is a file used to build a docker image! Command parameter script
Construction steps
- Write dockerfile script file
- Use docker build -f dockerfile path - t image name (stevenyin/centos:1.1.0)
- Run image docker run
- Publish image docker push(DockerHub, Alibaba cloud image warehouse)
Check out what the authorities do
DockerFile construction process
Basic knowledge
- Each reserved keyword (instruction) must be capitalized
- From top to bottom
- #Representative notes
- Each instruction builds a mirror layer
Dockerfile is development oriented. When you publish a project in the future, you need to write a dockerfile file to mirror it
step
- DockerFile: build file, define steps, equivalent to source code
- DockerImages: build and generate images through DockerFile, and finally release and run products
- DockerContainer: a container is an environment for running images
DockerFile instruction
FROM # The basic image is built from here MAINNTAINER # Who wrote the image, author + email RUN # Image building is a command that needs to be run ADD # tomcat image. tomcat is a compressed package. Add content WORKDIR # Mirror working directory VOLUME # Directory mount EXPOSE # Burst port CMD # Specify the command to be run when the container starts. Only the last command will take effect and can be replaced ENTRYPOINT # Specify the command to be run when the container starts, and you can append the command ONBUILD # When running an inherited DockerFile, ONBUILD will be triggered COPY # Similar to ADD, copy the file to the container ENV # Setting environment variables
Building centos
# 1. Write configuration file dockerfile [root@izuf6cn5k7l8xuxojhszqbz dockerfile]# vim mydockerfile-centos [root@izuf6cn5k7l8xuxojhszqbz dockerfile]# cat mydockerfile-centos FROM centos MAINTAINER steven<yinhaoye@qq.com> ENV MYPATH /usr/local WORKDIR $MYPATH RUN yum -y install vim RUN yum -y install net-tools EXPOSE 80 CMD $MYPATH CMD echo "------end------" CMD /bin/bash [root@izuf6cn5k7l8xuxojhszqbz dockerfile]# # 2. Build image through file # Command docker build -f dockerfile -t image: [tag] [root@izuf6cn5k7l8xuxojhszqbz dockerfile]# docker build -f /home/dockerfile/mydockerfile-centos -t stevenyin/centos:1.11 . Successfully built 502fedcf049b Successfully tagged stevenyin/centos:1.11
View docker build image history
# View docker image construction history # docker history image ID [root@izuf6cn5k7l8xuxojhszqbz dockerfile]# docker history 502fedcf049b IMAGE CREATED CREATED BY SIZE COMMENT 502fedcf049b 12 minutes ago /bin/sh -c #(nop) CMD ["/bin/sh" "-c" "/bin... 0B a77ba559c57e 12 minutes ago /bin/sh -c #(nop) CMD ["/bin/sh" "-c" "echo... 0B 32e6bf5b4d27 12 minutes ago /bin/sh -c #(nop) CMD ["/bin/sh" "-c" "$MYP... 0B 5c37e637387e 12 minutes ago /bin/sh -c #(nop) EXPOSE 80 0B b80d50163d6d 12 minutes ago /bin/sh -c yum -y install net-tools 22.8MB c682c6f2c7e5 12 minutes ago /bin/sh -c yum -y install vim 57.2MB a7a7c274e0db 13 minutes ago /bin/sh -c #(nop) WORKDIR /usr/local 0B 2cd2577889b9 13 minutes ago /bin/sh -c #(nop) ENV MYPATH=/usr/local 0B 4c14c20e220e 13 minutes ago /bin/sh -c #(nop) MAINTAINER steven<yinhaoy... 0B 0d120b6ccaa8 2 months ago /bin/sh -c #(nop) CMD ["/bin/bash"] 0B <missing> 2 months ago /bin/sh -c #(nop) LABEL org.label-schema.sc... 0B <missing> 2 months ago /bin/sh -c #(nop) ADD file:538afc0c5c964ce0d... 215MB [root@izuf6cn5k7l8xuxojhszqbz dockerfile]#
Difference between CMD and ENTRYPOINT
CMD # Specify the command to be run when the container starts. Only the last command will take effect and can be replaced ENTRYPOINT # Specify the command to be run when the container starts, and you can append the command
CMD test
# 1. Write dockerfile mydockerfile CMD FROM centos CMD ["ls","-a"] # 2. Build image [root@izuf6cn5k7l8xuxojhszqbz dockerfile]# docker build -f mydockerfile-cmd -t stevenyin/cmd:1.10 . # run and find that ls -a takes effect [root@izuf6cn5k7l8xuxojhszqbz dockerfile]# docker run stevenyin/cmd:1.10 . .. .dockerenv bin dev etc home lib lib64 lost+found opt root run sbin srv sys tmp usr var # 3. Want to add the command - L LS - al [root@izuf6cn5k7l8xuxojhszqbz dockerfile]# docker run stevenyin/cmd:1.10 -l docker: Error response from daemon: OCI runtime create failed: container_linux.go:349: starting container process caused "exec: \"-l\": executable file not found in $PATH": unknown. # In the case of CMD, -l replaces CMD ["ls","-a"] -l is not a command, so an error is reported
ENTRYPOINT test
# 1. Write DockerFile file FROM centos ENTRYPOINT ["ls","-a"] # 2. Build image docker build -f mydockerfile-entrypoint -t stevenyin/entrypoint:1.10 . [root@izuf6cn5k7l8xuxojhszqbz dockerfile]# docker run stevenyin/entrypoint:1.10 . .. .dockerenv bin dev etc home lib lib64 lost+found media mnt opt proc root run sbin srv sys tmp usr var [root@izuf6cn5k7l8xuxojhszqbz dockerfile]# docker run stevenyin/entrypoint:1.10 -l total 56 drwxr-xr-x 1 root root 4096 Oct 25 02:22 . drwxr-xr-x 1 root root 4096 Oct 25 02:22 .. -rwxr-xr-x 1 root root 0 Oct 25 02:22 .dockerenv lrwxrwxrwx 1 root root 7 May 11 2019 bin -> usr/bin drwxr-xr-x 5 root root 340 Oct 25 02:22 dev drwxr-xr-x 1 root root 4096 Oct 25 02:22 etc drwxr-xr-x 2 root root 4096 May 11 2019 home lrwxrwxrwx 1 root root 7 May 11 2019 lib -> usr/lib lrwxrwxrwx 1 root root 9 May 11 2019 lib64 -> usr/lib64 drwx------ 2 root root 4096 Aug 9 21:40 lost+found drwxr-xr-x 2 root root 4096 May 11 2019 media drwxr-xr-x 2 root root 4096 May 11 2019 mnt drwxr-xr-x 2 root root 4096 May 11 2019 opt dr-xr-xr-x 120 root root 0 Oct 25 02:22 proc dr-xr-x--- 2 root root 4096 Aug 9 21:40 root drwxr-xr-x 11 root root 4096 Aug 9 21:40 run lrwxrwxrwx 1 root root 8 May 11 2019 sbin -> usr/sbin drwxr-xr-x 2 root root 4096 May 11 2019 srv dr-xr-xr-x 13 root root 0 Oct 24 02:53 sys drwxrwxrwt 7 root root 4096 Aug 9 21:40 tmp drwxr-xr-x 12 root root 4096 Aug 9 21:40 usr drwxr-xr-x 20 root root 4096 Aug 9 21:40 var [root@izuf6cn5k7l8xuxojhszqbz dockerfile]#
Publish image
DockerHub
-
Registered account number: https://hub.docker.com/
-
Login account
[root@izuf6cn5k7l8xuxojhszqbz software]# docker login --help Usage: docker login [OPTIONS] [SERVER] Log in to a Docker registry. If no server is specified, the default is defined by the daemon. Options: -p, --password string Password --password-stdin Take the password from stdin -u, --username string Username [root@izuf6cn5k7l8xuxojhszqbz software]# [root@izuf6cn5k7l8xuxojhszqbz software]# docker login -u stevenyin Password: WARNING! Your password will be stored unencrypted in /root/.docker/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded [root@izuf6cn5k7l8xuxojhszqbz software]# -
After logging in, you can submit the image, which is a docker push
[root@izuf6cn5k7l8xuxojhszqbz software]# docker push stevenyin/centos:1.11 The push refers to repository [docker.io/stevenyin/centos] 5bf7e4a8471d: Pushed bf760cbda826: Pushed 291f6e44771a: Layer already exists digest1.11: digest: sha256:530a45736f79e50515baa5591fc76635184dd783089ec3e1ebb21c261137d8db size: 953 # Add tag: docker tag stevenyin/centos:1.12 for image
Publish to alicloud image service
- Log in to Alibaba cloud
- Container mirroring service found
- Create namespace
- Create container image
-
Specific steps for pushing images
1. Log in to alicloud Docker Registry $ sudo docker login --username=yinghaoye123aq registry.cn-shanghai.aliyuncs.com The user name used for login is the full name of Alibaba cloud account, and the password is the password set when opening the service. You can modify the credential password on the access credential page. 2. from Registry Pull image from $ sudo docker pull registry.cn-shanghai.aliyuncs.com/aliyun-stevenyin/stevenyin:[Mirror version number] 3. Push mirror to Registry $ sudo docker login --username=yinghaoye123aq registry.cn-shanghai.aliyuncs.com $ sudo docker tag [ImageId] registry.cn-shanghai.aliyuncs.com/aliyun-stevenyin/stevenyin:[Mirror version number] $ sudo docker push registry.cn-shanghai.aliyuncs.com/aliyun-stevenyin/stevenyin:[Mirror version number] Replace the image in the example according to the actual image information[ImageId]and[Mirror version number]Parameters. 4. Select the appropriate mirror warehouse address from ECS When pushing an image, you can choose to use the intranet address of the image warehouse. The push speed will be improved and your public network traffic will not be lost. If you are using a machine located in VPC Network, please use registry-vpc.cn-shanghai.aliyuncs.com As Registry Domain name login. 5. Example use"docker tag"Command renames the image and pushes it to via the VPC address Registry. $ sudo docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE registry.aliyuncs.com/acs/agent 0.7-dfb6816 37bb9c63c8b2 7 days ago 37.89 MB $ sudo docker tag 37bb9c63c8b2 registry-vpc.cn-shanghai.aliyuncs.com/acs/agent:0.7-dfb6816 use "docker push" The command pushes the mirror to the remote. $ sudo docker push registry-vpc.cn-shanghai.aliyuncs.com/acs/agent:0.7-dfb6816
Docker network
Understand Docker0
# [root@izuf6cn5k7l8xuxojhszqbz ~]# docker run -d -p 3355:8080 --name tomcat9 tomcat:9.0
# Check the network address ip addr in the container. After startup, you will find 261: eth0@if262 IP address
[root@izuf6cn5k7l8xuxojhszqbz ~]# docker exec -it tomcat9 ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
261: eth0@if262: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet 172.17.0.2/16 brd 172.17.255.255 scope global eth0
valid_lft forever preferred_lft forever
[root@izuf6cn5k7l8xuxojhszqbz ~]#
# Can linux ping the container
[root@izuf6cn5k7l8xuxojhszqbz ~]# ping 172.17.0.2
PING 172.17.0.2 (172.17.0.2) 56(84) bytes of data.
64 bytes from 172.17.0.2: icmp_seq=1 ttl=64 time=0.086 ms
64 bytes from 172.17.0.2: icmp_seq=2 ttl=64 time=0.070 ms
64 bytes from 172.17.0.2: icmp_seq=3 ttl=64 time=0.060 ms
principle
- Every time a docker container is started, docker will assign an IP to the docker container. As long as docker is installed, the network card of docker0 bridging mode will be generated. The technology used is evth pair technology!
- Start a container again and find another pair of network cards
# The network cards brought by the container are one-to-one # Evth pair is a pair of virtual network device interfaces. They appear in pairs. One end is connected to the protocol and the other end is connected to each other
- The two containers can be ping ed
[root@izuf6cn5k7l8xuxojhszqbz ~]# docker exec -it tomcat9 ping 172.17.0.3 # Containers can be ping ed
network model
When the network is not specified, it is routed by docker0, and docker will assign an available IP by default
Docker uses the bridge in liunx, and the host is the bridge in docker, docker0
–link
# You cannot ping another container through the service name, but only through IP [root@izuf6cn5k7l8xuxojhszqbz ~]# docker exec -it tomcat9.1 ping tomcat9 ping: tomcat9: Name or service not known [root@izuf6cn5k7l8xuxojhszqbz ~]# # Through -- link, you can connect containers through the container name [root@izuf6cn5k7l8xuxojhszqbz ~]# docker run -d -P --name tomcat9.2 --link tomcat9 tomcat:9.0 [root@izuf6cn5k7l8xuxojhszqbz ~]# docker exec -it tomcat9.2 ping tomcat9 PING tomcat9 (172.17.0.2) 56(84) bytes of data. 64 bytes from tomcat9 (172.17.0.2): icmp_seq=1 ttl=64 time=0.095 ms 64 bytes from tomcat9 (172.17.0.2): icmp_seq=2 ttl=64 time=0.066 ms 64 bytes from tomcat9 (172.17.0.2): icmp_seq=3 ttl=64 time=0.064 ms
Explore inspect
tomcat9. Tom2 is configured locally
# Configure it in hosts and stay away from finding it here [root@izuf6cn5k7l8xuxojhszqbz /]# docker exec -it tomcat9.2 cat /etc/hosts 127.0.0.1 localhost ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 172.17.0.2 tomcat9 a3d12cff39da 172.17.0.4 7f5cb56cad3f [root@izuf6cn5k7l8xuxojhszqbz /]#
Essence exploration: – link is to add the mapping of 172.17.0.2 tomcat9 a3d12cff39da in the hosts file
Limitation: docker0 does not support access to container names
Custom network
View network
Network mode
Bridge: bridge network docker (by default, there is also a bridge mode for self creation)
none: no network configuration
Host: share network with host
Container: the container can be connected (less used, not recommended)
test
# Start directly -- net bridge is docker0 by default docker run -d -P --name tomcat9 --net bridge tomcat:9.0 # docker0 cannot be accessed through the domain name, but can be connected through -- link # Custom network --driver bridge Bridging mode --subnet 192.168.0.0/16 Subnet address --gateway 192.168.0.1 gateway [root@izuf6cn5k7l8xuxojhszqbz ~]# docker network create --driver bridge --subnet 192.168.0.0/16 --gateway 192.168.0.1 mynet 36c4197f8b73de837495b148d4b95a2f03c6747608733a2b5d506b98c653f034 [root@izuf6cn5k7l8xuxojhszqbz ~]# docker network ls NETWORK ID NAME DRIVER SCOPE 1edaf6a32eb9 bridge bridge local 18b32561b08d host host local abdd0e9a3c22 mydata_default bridge local 36c4197f8b73 mynet bridge local a7f1b5a0ad78 none null local [root@izuf6cn5k7l8xuxojhszqbz ~]#
# Use custom network launch container
[root@izuf6cn5k7l8xuxojhszqbz ~]# docker run -d -P --name tomcat9.1 --net mynet tomcat:9.0
658aab97504ae8ee63204c78bd431fc37b41677c51121fa96c2041961d912a80
[root@izuf6cn5k7l8xuxojhszqbz ~]# docker run -d -P --name tomcat9.2 --net mynet tomcat:9.0
97216395cd5188beab139a3f957019d42aa1b9da91a26d6b3cfd907fabc6b78f
# View custom network
[root@izuf6cn5k7l8xuxojhszqbz ~]# docker network inspect mynet
[
{
"Name": "mynet",
"Id": "36c4197f8b73de837495b148d4b95a2f03c6747608733a2b5d506b98c653f034",
"Created": "2020-10-25T21:45:21.745587216+08:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "192.168.0.0/16",
"Gateway": "192.168.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"658aab97504ae8ee63204c78bd431fc37b41677c51121fa96c2041961d912a80": {
"Name": "tomcat9.1",
"EndpointID": "168eb519cd776907149fd9d97121e0a068f2ea28a6b81e86cbac04b742d82721",
"MacAddress": "02:42:c0:a8:00:02",
"IPv4Address": "192.168.0.2/16",
"IPv6Address": ""
},
"97216395cd5188beab139a3f957019d42aa1b9da91a26d6b3cfd907fabc6b78f": {
"Name": "tomcat9.2",
"EndpointID": "00b1cc23a06c62087e7606b8b5286807ce0b7c3aca7d43a26cb8362147d10416",
"MacAddress": "02:42:c0:a8:00:03",
"IPv4Address": "192.168.0.3/16",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {}
}
]
[root@izuf6cn5k7l8xuxojhszqbz ~]#
# Again, you can access it through the container name without -- link
[root@izuf6cn5k7l8xuxojhszqbz ~]# docker exec -it tomcat9.1 ping tomcat9.2
PING tomcat9.2 (192.168.0.3) 56(84) bytes of data.
64 bytes from tomcat9.2.mynet (192.168.0.3): icmp_seq=1 ttl=64 time=0.065 ms
64 bytes from tomcat9.2.mynet (192.168.0.3): icmp_seq=2 ttl=64 time=0.070 ms
64 bytes from tomcat9.2.mynet (192.168.0.3): icmp_seq=3 ttl=64 time=0.066 ms
[root@izuf6cn5k7l8xuxojhszqbz ~]#
Network connectivity
# Network Unicom docker network connect network name container name docker network connect mynet tomcat9.2.2 # China Unicom will tomcat9 1.1 put it under mynet network # One container, two IP S
[root@izuf6cn5k7l8xuxojhszqbz ~]# docker exec -it tomcat9.1 ping tomcat9.1.1 PING tomcat9.1.1 (192.168.0.4) 56(84) bytes of data. 64 bytes from tomcat9.1.1.mynet (192.168.0.4): icmp_seq=1 ttl=64 time=0.101 ms 64 bytes from tomcat9.1.1.mynet (192.168.0.4): icmp_seq=2 ttl=64 time=0.073 ms 64 bytes from tomcat9.1.1.mynet (192.168.0.4): icmp_seq=3 ttl=64 time=0.082 ms [root@izuf6cn5k7l8xuxojhszqbz ~]#
Actual deployment of Redis cluster
for port in $(seq 1 6);\
do \
mkdir -p /mydata/redis/node-${port}/conf
touch /mydata/redis/node-${port}/conf/redis.conf
cat << EOF >/mydata/redis/node-${port}/conf/redis.conf
port 6379
bind 0.0.0.0
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
cluster-announce-ip 172.30.0.1${port}
cluster-announce-port 6379
cluster-announce-bus-port 16379
appendonly yes
EOF
done
# Start reids container
docker run -p 6371:6379 -p 16371:16379 --name redis-1 \
-v /mydata/redis/node-1/data:/data \
-v /mydata/redis/node-1/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.30.0.11 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6372:6379 -p 16372:16379 --name redis-2 \
-v /mydata/redis/node-2/data:/data \
-v /mydata/redis/node-2/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.30.0.12 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6373:6379 -p 16373:16379 --name redis-3 \
-v /mydata/redis/node-3/data:/data \
-v /mydata/redis/node-3/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.30.0.13 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6374:6379 -p 16374:16379 --name redis-4 \
-v /mydata/redis/node-4/data:/data \
-v /mydata/redis/node-4/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.30.0.14 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6375:6379 -p 16375:16379 --name redis-5 \
-v /mydata/redis/node-5/data:/data \
-v /mydata/redis/node-5/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.30.0.15 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
docker run -p 6376:6379 -p 16376:16379 --name redis-6 \
-v /mydata/redis/node-6/data:/data \
-v /mydata/redis/node-6/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.30.0.16 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf
# Create cluster
[root@izuf6cn5k7l8xuxojhszqbz /]# docker exec -it redis-1 /bin/sh
/data # redis-cli --cluster create 172.30.0.11:6379 172.30.0.12:6379 172.30.0.13:6379 172.30.0.14:6379 172.30.0.15:6379 172.30.0.16:6379 --c
luster-replicas 1
>>> Performing hash slots allocation on 6 nodes...
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 172.30.0.15:6379 to 172.30.0.11:6379
Adding replica 172.30.0.16:6379 to 172.30.0.12:6379
Adding replica 172.30.0.14:6379 to 172.30.0.13:6379
M: 96d6e1f4ad84f8c9101401bea7408f97e6c56bcd 172.30.0.11:6379
slots:[0-5460] (5461 slots) master
M: 039ee87ac86de914417233448396a3c089669a2b 172.30.0.12:6379
slots:[5461-10922] (5462 slots) master
M: f9de7fd7bf12f7a10ac24155b6b4d8fef6d61ad6 172.30.0.13:6379
slots:[10923-16383] (5461 slots) master
S: 534e73cf9cd34bac9d43fce82cdb2e1be90d9fdf 172.30.0.14:6379
replicates f9de7fd7bf12f7a10ac24155b6b4d8fef6d61ad6
S: 20fe1f4923f790377cbaffaf99f9d45558bbd017 172.30.0.15:6379
replicates 96d6e1f4ad84f8c9101401bea7408f97e6c56bcd
S: a7562cb7fa1cda8321295b12e3ffc3d844665cce 172.30.0.16:6379
replicates 039ee87ac86de914417233448396a3c089669a2b
Can I set the above configuration? (type 'yes' to accept): yes
>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join
..
>>> Performing Cluster Check (using node 172.30.0.11:6379)
M: 96d6e1f4ad84f8c9101401bea7408f97e6c56bcd 172.30.0.11:6379
slots:[0-5460] (5461 slots) master
1 additional replica(s)
S: 20fe1f4923f790377cbaffaf99f9d45558bbd017 172.30.0.15:6379
slots: (0 slots) slave
replicates 96d6e1f4ad84f8c9101401bea7408f97e6c56bcd
S: 534e73cf9cd34bac9d43fce82cdb2e1be90d9fdf 172.30.0.14:6379
slots: (0 slots) slave
replicates f9de7fd7bf12f7a10ac24155b6b4d8fef6d61ad6
M: 039ee87ac86de914417233448396a3c089669a2b 172.30.0.12:6379
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
M: f9de7fd7bf12f7a10ac24155b6b4d8fef6d61ad6 172.30.0.13:6379
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
S: a7562cb7fa1cda8321295b12e3ffc3d844665cce 172.30.0.16:6379
slots: (0 slots) slave
replicates 039ee87ac86de914417233448396a3c089669a2b
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
/data #
# Test cluster
/data # redis-cli -c
127.0.0.1:6379> cluster info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:1
cluster_stats_messages_ping_sent:480
cluster_stats_messages_pong_sent:475
cluster_stats_messages_sent:955
cluster_stats_messages_ping_received:470
cluster_stats_messages_pong_received:480
cluster_stats_messages_meet_received:5
cluster_stats_messages_received:955
127.0.0.1:6379> cluster nodes
20fe1f4923f790377cbaffaf99f9d45558bbd017 172.30.0.15:6379@16379 slave 96d6e1f4ad84f8c9101401bea7408f97e6c56bcd 0 1603708641983 5 connected
534e73cf9cd34bac9d43fce82cdb2e1be90d9fdf 172.30.0.14:6379@16379 slave f9de7fd7bf12f7a10ac24155b6b4d8fef6d61ad6 0 1603708641000 4 connected
96d6e1f4ad84f8c9101401bea7408f97e6c56bcd 172.30.0.11:6379@16379 myself,master - 0 1603708640000 1 connected 0-5460
039ee87ac86de914417233448396a3c089669a2b 172.30.0.12:6379@16379 master - 0 1603708640580 2 connected 5461-10922
f9de7fd7bf12f7a10ac24155b6b4d8fef6d61ad6 172.30.0.13:6379@16379 master - 0 1603708640000 3 connected 10923-16383
a7562cb7fa1cda8321295b12e3ffc3d844665cce 172.30.0.16:6379@16379 slave 039ee87ac86de914417233448396a3c089669a2b 0 1603708640000 6 connected
127.0.0.1:6379> set a b
-> Redirected to slot [15495] located at 172.30.0.13:6379
OK
172.30.0.13:6379> get a
^C
/data # redis-cli -c
127.0.0.1:6379> get a
-> Redirected to slot [15495] located at 172.30.0.14:6379
"b"
172.30.0.14:6379> cluster nodes
534e73cf9cd34bac9d43fce82cdb2e1be90d9fdf 172.30.0.14:6379@16379 myself,master - 0 1603708963000 7 connected 10923-16383
a7562cb7fa1cda8321295b12e3ffc3d844665cce 172.30.0.16:6379@16379 slave 039ee87ac86de914417233448396a3c089669a2b 0 1603708964000 2 connected
039ee87ac86de914417233448396a3c089669a2b 172.30.0.12:6379@16379 master - 0 1603708964000 2 connected 5461-10922
f9de7fd7bf12f7a10ac24155b6b4d8fef6d61ad6 172.30.0.13:6379@16379 master,fail - 1603708902628 1603708901000 3 connected
96d6e1f4ad84f8c9101401bea7408f97e6c56bcd 172.30.0.11:6379@16379 master - 0 1603708965564 1 connected 0-5460
20fe1f4923f790377cbaffaf99f9d45558bbd017 172.30.0.15:6379@16379 slave 96d6e1f4ad84f8c9101401bea7408f97e6c56bcd 0 1603708964563 1 connected
172.30.0.14:6379>
docker cluster setup completed!
Install ZooKeeper
1, Stand alone construction
-
Download Image
[root@izuf6cn5k7l8xuxojhszqbz ~]# docker pull zookeeper:3.5
-
Create data mount directory
/mydata/zookeeper/conf
/mydata/zookeeper/data
/mydata/zookeeper/datalog -
Run zookeeper
docker run -d --name zookeeper3.5 \ --restart always \ -p 2181:2181 -p 2888:2888 -p 3888:3888 \ -v /mydata/zookeeper/conf:/conf \ -v /mydata/zookeeper/data:/data \ -v /mydata/zookeeper/datalog:/datalog \ zookeeper:3.5
-
Enter zookeeper container
[root@izuf6cn5k7l8xuxojhszqbz zookeeper]# docker exec -it zookeeper3.5 /bin/bash root@1d0a2f5178b8:/apache-zookeeper-3.5.8-bin/bin# ls README.txt zkCli.cmd zkEnv.cmd zkServer-initialize.sh zkServer.sh zkTxnLogToolkit.sh zkCleanup.sh zkCli.sh zkEnv.sh zkServer.cmd zkTxnLogToolkit.cmd root@1d0a2f5178b8:/apache-zookeeper-3.5.8-bin/bin# ./zkCli.sh Connecting to localhost:2181 log4j:WARN No appenders could be found for logger (org.apache.zookeeper.ZooKeeper). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. Welcome to ZooKeeper! JLine support is enabled WATCHER:: WatchedEvent state:SyncConnected type:None path:null [zk: localhost:2181(CONNECTED) 0] create /test test Created /test [zk: localhost:2181(CONNECTED) 1] get /test test [zk: localhost:2181(CONNECTED) 2]
2, Cluster construction
-
Create a zookeeper cluster folder under / mydata /
mkdir zookeeper-cluster
-
Create three zookeeper0x folders under / mydata / zookeeper cluster
mkdir zookeeper01 mkdir zookeeper02 mkdir zookeeper03
-
Each zookeeper0x is created as follows
mkdir conf data datalog
- Create docker compose.com in / mydata / zookeeper cluster directory YML file and write
touch docker-compose.yml //create a file vim docker-compose.yml //Enter vim compiler
Write docker compose YML file
version: '3'#Fixed version number services: zoo1: image: zookeeper #Mirror used restart: always #Automatic restart after downtime hostname: zoo1 #The host (parent container) name that hosts the zookeeper container can be omitted container_name: zoo1 #Container name privileged: true #Using this parameter, the root in the container has the real root right. The container started by privileged can see many devices on the host and execute mount. It even allows you to start the docker container in the docker container. ports: #Port mapping for hosts and containers - "2181:2181" volumes: #Create the mount directory of the zookeeper container on the host - /mydata/zookeeper-cluster/zookeeper01/data:/data #data - /mydata/zookeeper-cluster/zookeeper01/datalog:/datalog #journal - /mydata/zookeeper-cluster/zookeeper01/conf:/conf #configuration file environment: #zookeeper3.4 and zookeeper 3.5 stay docker This is the difference in setting up clusters in the environment #zoo1 is the container name and also the host name, which means using the intranet communication of the container (1) zookeeper 3 Zoom specified in 5_ "; 2181" is added after the ip address and port number of the servers parameter. (2)ZOO_ When servers specifies the ip address, the local ip address is written as 0.0.0.0. ZOO_MY_ID: 1 ZOO_SERVERS: server.1=0.0.0.0:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=zoo3:2888:3888;2181 zoo2: image: zookeeper restart: always hostname: zoo2 container_name: zoo2 privileged: true ports: - "2182:2181" volumes: - /mydata/zookeeper-cluster/zookeeper02/data:/data - /mydata/zookeeper-cluster/zookeeper02/datalog:/datalog - /mydata/zookeeper-cluster/zookeeper02/conf:/conf environment: ZOO_MY_ID: 2 ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=0.0.0.0:2888:3888;2181 server.3=zoo3:2888:3888;2181 zoo3: image: zookeeper restart: always hostname: zoo3 container_name: zoo3 privileged: true ports: - "2183:2181" volumes: - /mydata/zookeeper-cluster/zookeeper03/data:/data - /mydata/zookeeper-cluster/zookeeper03/datalog:/datalog - /mydata/zookeeper-cluster/zookeeper03/conf:/conf environment: ZOO_MY_ID: 3 ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=0.0.0.0:2888:3888;2181- Run docker compose YML file
docker-compose up -d
- Stop cluster
docker-compose down
- View the created zookeeper cluster
docker ps Or in docker-compose.yml File directory input docker-compose ps
Docker Compose
brief introduction
Docker Compose defines, runs and manages containers
A docker-compose.yml looks like this:
version: "3.8"
services:
web:
build: .
ports:
- "5000:5000"
volumes:
- .:/code
- logvolume01:/var/log
links:
- redis
redis:
image: redis
volumes:
logvolume01: {}
Compose concept
- service, container, application (web, Redis, MySQL...)
- Project, a set of associated containers
install
- Run and install Compose
curl -L https://get.daocloud.io/docker/compose/releases/download/1.25.5/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
- Give docker compose executable permission
sudo chmod +x /usr/local/bin/docker-compose
- Quick start: https://docs.docker.com/compose/gettingstarted/