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Docker - Basic Commands

Images

查詢images:

[root@localhost ~]# docker images
Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg.
REPOSITORY                          TAG         IMAGE ID      CREATED       SIZE
localhost/http-sample_http-service  latest      f8dec1371ce9  9 hours ago   44.4 MB
docker.io/library/nginx             alpine      529b5644c430  2 months ago  44.4 MB

刪除image:

docker rmi image_name

Containers

查詢所有containers(包含停止):

[root@localhost ~]# docker ps -a
Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg.
CONTAINER ID  IMAGE                                      COMMAND               CREATED      STATUS                  PORTS               NAMES
f81f36b9cee1  docker.io/library/nginx:alpine             nginx -g daemon o...  9 hours ago  Created                 0.0.0.0:80->80/tcp  http-sample_nginx_1
621e03be78a6  localhost/http-sample_http-service:latest  nginx -g daemon o...  9 hours ago  Exited (0) 9 hours ago                      http-sample_http-service_1

停止、啟動、重啟container、刪除:

docker stop container_name_or_id
docker start container_name_or_id
docker restart container_name_or_id
docker rm container_name_or_id

查詢container log:

[root@localhost http-sample]# docker logs 41c242135b04
Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg.
/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: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
/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
2024/01/14 02:29:39 [notice] 1#1: using the "epoll" event method
2024/01/14 02:29:39 [notice] 1#1: nginx/1.25.3
2024/01/14 02:29:39 [notice] 1#1: built by gcc 12.2.1 20220924 (Alpine 12.2.1_git20220924-r10)
2024/01/14 02:29:39 [notice] 1#1: OS: Linux 5.14.0-284.11.1.el9_2.x86_64
2024/01/14 02:29:39 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2024/01/14 02:29:39 [notice] 1#1: start worker processes
2024/01/14 02:29:39 [notice] 1#1: start worker process 25
2024/01/14 02:29:39 [notice] 1#1: start worker process 26
2024/01/14 02:29:39 [notice] 1#1: start worker process 27
2024/01/14 02:29:39 [notice] 1#1: start worker process 28

查詢詳細資訊:

docker inspect container_name_or_id

進入container內使用shell:

docker exec -it container_name_or_id /bin/sh

Docker-Compose

在對應的目錄直接執行去啟動或停止docker-compose

podman-compose up
podman-compose down

假如懷疑build container過程發生問題要看log

podman-compose up -build


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