1, What is docker
Containers in docker:
- lxc --> libcontainer --> runC
2, OCI & OCF
OCI
Open Container-initiative
- Led by the Linux foundation, it was founded in June 2015
- It aims to develop an open industrial standard around container format and runtime
- contains two specifications
- the Runtime Specification(runtime-spec)
- the Image Specification(image-spec)
OCF
Open Container Format
runC is a CLI tool for spawning and running containers according to the OCI specification
- Containers are started as a child process of runC and can be embedded into various other systems without having to run a daemon
- runC is built on libcontainer, the same container technology powering millions of Docker Engine installations
docker provides a site dedicated to container images: https://hub.docker.com
3, docker architecture
4, docker image and image warehouse
Why is the name of the image repository Registry instead of repository? In docker, the name of the warehouse is named after the name of the application.
The image is static, while the container is dynamic. The container has its life cycle. The relationship between the image and the container is similar to that between the program and the process. The image is similar to the program file in the file system, while the container is similar to the state in which a program runs, that is, the process. Therefore, containers can be deleted. After a container is deleted, its image will not be deleted.
5, docker object
When you use docker, you are creating and using images, containers, networks, volumes, pluginns, and other objects.
- IMAGES
- An image is a read-only template with instructions for creating a docker container.
- Often, an image is based on another image, with some additional customization.
- You might create your own images or you might only use those created by others and published in a registry.
- CONTAINERS
- A conntainer is a runnable instance of an image.
- You can create, run, stop, move, or delete a container using the docker API or CLI.
- You can connect a container to one or more networks, attach storage to it, or even create a new image based on its current state.
6, Installing and using docker
docker installation
[root@localhost ~]# cd /etc/yum.repos.d/ [root@localhost yum.repos.d]# curl -o docker-ce.repo https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/docker-ce.repo [root@localhost yum.repos.d]# sed -i 's@https://download.docker.com@https://mirrors.tuna.tsinghua.edu.cn/docker-ce@g' docker-ce.repo [root@localhost yum.repos.d]# yum -y install docker-ce [root@localhost yum.repos.d]# yum clean all Failed to set locale, defaulting to C.UTF-8 28 files removed // Start service [root@localhost ~]# systemctl enable --now docker Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /usr/lib/systemd/system/docker.service. [root@localhost ~]# ls /etc/docker/ key.json
docker acceleration
The configuration file of docker CE is / etc/docker/daemon.json, which does not exist by default. We need to create and configure it manually, and the acceleration of docker is realized by configuring this file.
docker can be accelerated in many ways:
- docker cn
- Accelerator of China University of science and technology
- Alicloud accelerator (you need to register an account through alicloud Developer Platform and use your own accelerator for free)
[root@Docker ~]# systemctl enable --now docker / / start the docker service
Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /usr/lib/systemd/system/docker.service.
// Add accelerator
cat > /etc/docker/daemon.json <<EOF
{
"registry-mirrors": ["https://docker.mirrors.ustc.edu.cn/"]
}
EOF
// restart
[root@local ~]# systemctl dameon-reload docker
[root@local ~]# systemctl restart docker
docker common operations
| command | function |
|---|---|
| docker search | Search the Docker Hub for images |
| docker pull | Pull an image or a repository from a registry |
| docker images | List images |
| docker create | Create a new conntainer |
| docker start | Start one or more stopped containers |
| docker run | Run a command in a new container |
| docker attach | Attach to a runninng container |
| docker ps | List containers |
| docker logs | Fetch the logs of a container |
| docker restart | Restart a container |
| docker stop | Stop one or more running containers |
| docker kill | Kill one or more running containers |
| docker rm | Remove onne or more containers |
| docker exec | Run a command in a running container |
| docker info | Display system-wide information |
| docker inspect | Return low-level information on Docker objects |
docker version: View version
[root@localhost ~]# docker version Client: Docker Engine - Community Version: 20.10.11 API version: 1.41 Go version: go1.16.9 Git commit: dea9396 Built: Thu Nov 18 00:36:58 2021 OS/Arch: linux/amd64 Context: default Experimental: true Server: Docker Engine - Community Engine: Version: 20.10.11 API version: 1.41 (minimum version 1.12) Go version: go1.16.9 Git commit: 847da18 Built: Thu Nov 18 00:35:20 2021 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.4.12 GitCommit: 7b11cfaabd73bb80907dd23182b9347b4245eb5d runc: Version: 1.0.2 GitCommit: v1.0.2-0-g52b36a2 docker-init: Version: 0.19.0 GitCommit: de40ad0
docker info: view system information
[root@localhost ~]# docker info Client: Context: default Debug Mode: false Plugins: app: Docker App (Docker Inc., v0.9.1-beta3) buildx: Build with BuildKit (Docker Inc., v0.6.3-docker) scan: Docker Scan (Docker Inc., v0.9.0) Server: Containers: 0 Running: 0 Paused: 0 Stopped: 0 Images: 1 Server Version: 20.10.11 Storage Driver: overlay2 Backing Filesystem: xfs Supports d_type: true Native Overlay Diff: true userxattr: false Logging Driver: json-file Cgroup Driver: cgroupfs Cgroup Version: 1 Plugins: Volume: local Network: bridge host ipvlan macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog Swarm: inactive Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc Default Runtime: runc Init Binary: docker-init containerd version: 7b11cfaabd73bb80907dd23182b9347b4245eb5d runc version: v1.0.2-0-g52b36a2 init version: de40ad0 Security Options: seccomp Profile: default Kernel Version: 4.18.0-257.el8.x86_64 Operating System: CentOS Stream 8 OSType: linux Architecture: x86_64 CPUs: 8 Total Memory: 3.622GiB Name: localhost.localdomain ID: FT3B:RKJB:SBUC:OAL7:NW2C:QBTY:6VIW:PWHU:CWBD:PQPU:D424:BZJU Docker Root Dir: /var/lib/docker Debug Mode: false Registry: https://index.docker.io/v1/ Labels: Experimental: false Insecure Registries: 127.0.0.0/8 Live Restore Enabled: false
docker pull: pull the image
[root@localhost ~]# docker pull nginx Using default tag: latest latest: Pulling from library/nginx eff15d958d66: Pull complete 1e5351450a59: Pull complete 2df63e6ce2be: Pull complete 9171c7ae368c: Pull complete 020f975acd28: Pull complete 266f639b35ad: Pull complete Digest: sha256:097c3a0913d7e3a5b01b6c685a60c03632fc7a2b50bc8e35bcaa3691d788226e Status: Downloaded newer image for nginx:latest docker.io/library/nginx:latest
docker images: lists all current images of the system
[root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginx latest ea335eea17ab 13 days ago 141MB
docker search: find the image in the docker hub
[root@localhost ~]# docker search nginx NAME DESCRIPTION STARS OFFICIAL AUTOMATED nginx Official build of Nginx. 15893 [OK] jwilder/nginx-proxy Automated Nginx reverse proxy for docker con... 2098 [OK] richarvey/nginx-php-fpm Container running Nginx + PHP-FPM capable of... 819 [OK] jc21/nginx-proxy-manager Docker container for managing Nginx proxy ho... 285 linuxserver/nginx An Nginx container, brought to you by LinuxS... 160 tiangolo/nginx-rtmp Docker image with Nginx using the nginx-rtmp... 146 [OK] jlesage/nginx-proxy-manager Docker container for Nginx Proxy Manager 144 [OK] alfg/nginx-rtmp NGINX, nginx-rtmp-module and FFmpeg from sou... 110 [OK] jasonrivers/nginx-rtmp Docker images to host RTMP streams using NGI... 95 [OK] nginxdemos/hello NGINX webserver that serves a simple page co... 79 [OK] privatebin/nginx-fpm-alpine PrivateBin running on an Nginx, php-fpm & Al... 60 [OK] nginx/nginx-ingress NGINX and NGINX Plus Ingress Controllers fo... 57 nginxinc/nginx-unprivileged Unprivileged NGINX Dockerfiles 54 nginxproxy/nginx-proxy Automated Nginx reverse proxy for docker con... 28 staticfloat/nginx-certbot Opinionated setup for automatic TLS certs lo... 25 [OK] nginx/nginx-prometheus-exporter NGINX Prometheus Exporter for NGINX and NGIN... 22 schmunk42/nginx-redirect A very simple container to redirect HTTP tra... 19 [OK] centos/nginx-112-centos7 Platform for running nginx 1.12 or building ... 16 centos/nginx-18-centos7 Platform for running nginx 1.8 or building n... 13 bitwarden/nginx The Bitwarden nginx web server acting as a r... 11 mailu/nginx Mailu nginx frontend 9 [OK] sophos/nginx-vts-exporter Simple server that scrapes Nginx vts stats a... 7 [OK] ansibleplaybookbundle/nginx-apb An APB to deploy NGINX 3 [OK] wodby/nginx Generic nginx 1 [OK] arnau/nginx-gate Docker image with Nginx with Lua enabled on ... 1 [OK]
docker image history: view the history of the specified image
[root@localhost ~]# docker image history nginx IMAGE CREATED CREATED BY SIZE COMMENT ea335eea17ab 13 days ago /bin/sh -c #(nop) CMD ["nginx" "-g" "daemon... 0B <missing> 13 days ago /bin/sh -c #(nop) STOPSIGNAL SIGQUIT 0B <missing> 13 days ago /bin/sh -c #(nop) EXPOSE 80 0B <missing> 13 days ago /bin/sh -c #(nop) ENTRYPOINT ["/docker-entr... 0B <missing> 13 days ago /bin/sh -c #(nop) COPY file:09a214a3e07c919a... 4.61kB <missing> 13 days ago /bin/sh -c #(nop) COPY file:0fd5fca330dcd6a7... 1.04kB <missing> 13 days ago /bin/sh -c #(nop) COPY file:0b866ff3fc1ef5b0... 1.96kB <missing> 13 days ago /bin/sh -c #(nop) COPY file:65504f71f5855ca0... 1.2kB <missing> 13 days ago /bin/sh -c set -x && addgroup --system -... 61.1MB <missing> 13 days ago /bin/sh -c #(nop) ENV PKG_RELEASE=1~bullseye 0B <missing> 13 days ago /bin/sh -c #(nop) ENV NJS_VERSION=0.7.0 0B <missing> 13 days ago /bin/sh -c #(nop) ENV NGINX_VERSION=1.21.4 0B <missing> 13 days ago /bin/sh -c #(nop) LABEL maintainer=NGINX Do... 0B <missing> 2 weeks ago /bin/sh -c #(nop) CMD ["bash"] 0B <missing> 2 weeks ago /bin/sh -c #(nop) ADD file:a2405ebb9892d98be... 80.4MB
docker image inspect: view the details of the specified image
[root@localhost ~]# docker inspect nginx
[
{
"Id": "sha256:ea335eea17ab984571cd4a3bcf90a0413773b559c75ef4cda07d0ce952b00291",
"RepoTags": [
"nginx:latest"
],
"RepoDigests": [
"nginx@sha256:097c3a0913d7e3a5b01b6c685a60c03632fc7a2b50bc8e35bcaa3691d788226e"
],
"Parent": "",
"Comment": "",
"Created": "2021-11-17T10:38:14.652464384Z",
"Container": "8a038ff17987cf87d4b7d7e2c80cb83bd2474d66e2dd0719e2b4f7de2ad6d853",
"ContainerConfig": {
"Hostname": "8a038ff17987",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"80/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"NGINX_VERSION=1.21.4",
"NJS_VERSION=0.7.0",
"PKG_RELEASE=1~bullseye"
],
"Cmd": [
"/bin/sh",
"-c",
"#(nop) ",
"CMD [\"nginx\" \"-g\" \"daemon off;\"]"
],
"Image": "sha256:2fb4060b053a39040c51ff7eadd30325de2c76650fc50aa42839070e16e8bdcb",
.....Omitted here
docker create: creates a container (but the container will not start)
[root@localhost ~]# docker create httpd Unable to find image 'httpd:latest' locally latest: Pulling from library/httpd eff15d958d66: Already exists ba1caf8ba86c: Pull complete ab86dc02235d: Pull complete 0d58b11d2867: Pull complete e88da7cb925c: Pull complete Digest: sha256:1d71eef54c08435c0be99877c408637f03112dc9f929fba3cccdd15896099b02 Status: Downloaded newer image for httpd:latest 8877c16c9c19353c6eb74a93827ed9914fbeb503067d6cc7f1f1e68e4f3ce203
docker rm: delete image
[root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE httpd latest ad17c88403e2 12 days ago 143MB nginx latest ea335eea17ab 13 days ago 141MB [root@localhost ~]# docker rmi ad17c88403e2 Untagged: httpd:latest Untagged: httpd@sha256:1d71eef54c08435c0be99877c408637f03112dc9f929fba3cccdd15896099b02 Deleted: sha256:ad17c88403e2cedd27963b98be7f04bd3f903dfa7490586de397d0404424936d Deleted: sha256:a59e7dfeeb485a8a45b1fcce812b10fbd955d304fa2e9ca43b10b16a8ee1afb8 Deleted: sha256:9592080464aa1890ed187c42a13ecc9f175e975a96a3fad28df0559ad0c08b9d Deleted: sha256:42d2debfa0c419f7f89affa3e9b62d1b7e54dc6654dbd186d4654ee3661c44c8 Deleted: sha256:136822c50a75392f4ce06461fa4894aa7d1e060ec0dd4782e13e2d9829df50a3 [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginx latest ea335eea17ab 13 days ago 141MB
docker ps: List containers
[root@localhost ~]# docker ps // View all running containers CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES [root@localhost ~]# docker ps -a // View all containers (running and non running) CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8877c16c9c19 httpd "httpd-foreground" 21 seconds ago Created infallible_nobel
docker start: starts the container
[root@localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8877c16c9c19 httpd "httpd-foreground" About a minute ago Created infallible_nobel [root@localhost ~]# docker start 8877c16c9c19 8877c16c9c19 [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8877c16c9c19 httpd "httpd-foreground" About a minute ago Up 4 seconds 80/tcp infallible_nobel
docker attach: enter container
In the current shell, the attach connection specifies to run the image. If you enter the container in this way, the container will always occupy the foreground. If you exit the container, the container stops running
[root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8877c16c9c19 httpd "httpd-foreground" 2 minutes ago Up 56 seconds 80/tcp infallible_nobel [root@localhost ~]# docker attach 8877c16c9c19 [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
docker exec: enter container
This command runs in the background of the container. Even if you exit the container, the container will not stop running
// Start container [root@localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8877c16c9c19 httpd "httpd-foreground" 4 minutes ago Exited (0) About a minute ago infallible_nobel [root@localhost ~]# docker start 8877c16c9c19 8877c16c9c19 [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8877c16c9c19 httpd "httpd-foreground" 4 minutes ago Up 3 seconds 80/tcp infallible_nobel // Enter container [root@localhost ~]# docker exec -it 8877c16c9c19 /bin/bash root@8877c16c9c19:/usr/local/apache2# ls bin cgi-bin error icons logs build conf htdocs include modules root@8877c16c9c19:/usr/local/apache2# exit exit // View container startup [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8877c16c9c19 httpd "httpd-foreground" 5 minutes ago Up 46 seconds 80/tcp infallible_nobel
docker inspect: View container details
[root@localhost ~]# docker inspect 8877c16c9c19
[
{
"Id": "8877c16c9c19353c6eb74a93827ed9914fbeb503067d6cc7f1f1e68e4f3ce203",
"Created": "2021-12-01T10:06:47.836823243Z",
"Path": "httpd-foreground",
"Args": [],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 50995,
"ExitCode": 0,
"Error": "",
"StartedAt": "2021-12-01T10:11:23.288419586Z",
"FinishedAt": "2021-12-01T10:10:05.442221306Z"
},
"Image":
......Omitted later
docker logs: View container log information
// Create container [root@localhost ~]# docker create nginx baac0f280b0a2581ad5c3be233841f0d985d37ca3ecb7c3be5008bca941c9979 [root@localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES baac0f280b0a nginx "/docker-entrypoint...." 5 seconds ago Created sleepy_mccarthy 8877c16c9c19 httpd "httpd-foreground" 9 minutes ago Up 4 minutes 80/tcp infallible_nobel // The container is not running. Unable to view log information [root@localhost ~]# docker logs baac0f280b0a // Start container [root@localhost ~]# docker start baac0f280b0a baac0f280b0a // View log information [root@localhost ~]# docker logs baac0f280b0a /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf 10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh /docker-entrypoint.sh: Configuration complete; ready for start up 2021/12/01 10:16:51 [notice] 1#1: using the "epoll" event method 2021/12/01 10:16:51 [notice] 1#1: nginx/1.21.4 2021/12/01 10:16:51 [notice] 1#1: built by gcc 10.2.1 20210110 (Debian 10.2.1-6) 2021/12/01 10:16:51 [notice] 1#1: OS: Linux 4.18.0-257.el8.x86_64 2021/12/01 10:16:51 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576 2021/12/01 10:16:51 [notice] 1#1: start worker processes 2021/12/01 10:16:51 [notice] 1#1: start worker process 31 2021/12/01 10:16:51 [notice] 1#1: start worker process 32 2021/12/01 10:16:51 [notice] 1#1: start worker process 33 2021/12/01 10:16:51 [notice] 1#1: start worker process 34 2021/12/01 10:16:51 [notice] 1#1: start worker process 35 2021/12/01 10:16:51 [notice] 1#1: start worker process 36 2021/12/01 10:16:51 [notice] 1#1: start worker process 37 2021/12/01 10:16:51 [notice] 1#1: start worker process 38
docker stop: stops the container
[root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES baac0f280b0a nginx "/docker-entrypoint...." About a minute ago Up About a minute 80/tcp sleepy_mccarthy 8877c16c9c19 httpd "httpd-foreground" 11 minutes ago Up 6 minutes 80/tcp infallible_nobel [root@localhost ~]# docker stop baac0f280b0a baac0f280b0a [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8877c16c9c19 httpd "httpd-foreground" 11 minutes ago Up 6 minutes 80/tcp infallible_nobel [root@localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES baac0f280b0a nginx "/docker-entrypoint...." 2 minutes ago Exited (0) 5 seconds ago sleepy_mccarthy 8877c16c9c19 httpd "httpd-foreground" 11 minutes ago Up 7 minutes 80/tcp infallible_nobel
docker restart: restart the container
[root@localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES baac0f280b0a nginx "/docker-entrypoint...." 3 minutes ago Exited (0) About a minute ago sleepy_mccarthy 8877c16c9c19 httpd "httpd-foreground" 12 minutes ago Up 8 minutes 80/tcp infallible_nobel [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8877c16c9c19 httpd "httpd-foreground" 12 minutes ago Up 8 minutes 80/tcp infallible_nobel [root@localhost ~]# docker restart baac0f280b0a baac0f280b0a [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES baac0f280b0a nginx "/docker-entrypoint...." 3 minutes ago Up 2 seconds 80/tcp sleepy_mccarthy 8877c16c9c19 httpd "httpd-foreground" 12 minutes ago Up 8 minutes 80/tcp infallible_nobel
docker kill: kill the running container
[root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES baac0f280b0a nginx "/docker-entrypoint...." 4 minutes ago Up 40 seconds 80/tcp sleepy_mccarthy 8877c16c9c19 httpd "httpd-foreground" 13 minutes ago Up 8 minutes 80/tcp infallible_nobel [root@localhost ~]# docker kill 8877c16c9c19 8877c16c9c19 [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES baac0f280b0a nginx "/docker-entrypoint...." 4 minutes ago Up 55 seconds 80/tcp sleepy_mccarthy
docker run: create a container and start the container directly
The run command will first check whether the local image corresponds to the image. If not, pull it, then create a container, and then run the container
[root@localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES e2ae1f194bd8 httpd "/bin/bash" 37 minutes ago Exited (0) 36 minutes ago hungry_faraday [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE httpd latest ad17c88403e2 12 days ago 143MB [root@localhost ~]# docker run -it nginx /bin/bash Unable to find image 'nginx:latest' locally latest: Pulling from library/nginx eff15d958d66: Already exists 1e5351450a59: Pull complete 2df63e6ce2be: Pull complete 9171c7ae368c: Pull complete 020f975acd28: Pull complete 266f639b35ad: Pull complete Digest: sha256:097c3a0913d7e3a5b01b6c685a60c03632fc7a2b50bc8e35bcaa3691d788226e Status: Downloaded newer image for nginx:latest root@421bdeaf3878:/#
docker rm: delete container
[root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES baac0f280b0a nginx "/docker-entrypoint...." 7 minutes ago Up 4 minutes 80/tcp sleepy_mccarthy // Cannot delete a running container [root@localhost ~]# docker rm baac0f280b0a Error response from daemon: You cannot remove a running container baac0f280b0a2581ad5c3be233841f0d985d37ca3ecb7c3be5008bca941c9979. Stop the container before attempting removal or force remove // Add - f to force the deletion of running containers [root@localhost ~]# docker rm -f baac0f280b0a baac0f280b0a [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
docker event state
