Docker - 终端交互

本文介绍如何使用docker attach命令及nsenter工具进入Docker容器的交互终端,并解释了不同退出方式对容器状态的影响。

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进入容器交互终端

使用docker attach命令进入容器交互终端。
注意:如果多个窗口同时attach到同一个容器,那么所有窗口都会同步显示。如果某个窗口因命令阻塞时,那么其他窗口将无法执行操作。

[root@CentOS-7 ~]# docker images ubuntu
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
docker.io/ubuntu    latest              6a2f32de169d        13 days ago         117.2 MB
[root@CentOS-7 ~]# 
[root@CentOS-7 ~]# docker run --name test -idt ubuntu
6a0e7b067fe3122ad23b34d84653ca0872cda44efff903198f41e76e017e4a26
[root@CentOS-7 ~]# 
[root@CentOS-7 ~]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
6a0e7b067fe3        ubuntu              "/bin/bash"         7 seconds ago       Up 7 seconds                            test
[root@CentOS-7 ~]# 
[root@CentOS-7 ~]# docker attach test
root@6a0e7b067fe3:/# 
root@6a0e7b067fe3:/# exit
exit
[root@CentOS-7 ~]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
[root@CentOS-7 ~]# 

退出容器交互终端

通过Ctrl-p和Ctrl-q键,可以退出正在交互的容器终端,此时容器不会终止。
特别注意:通过exit命令或Ctrl+d键来退出容器终端时,所创建的容器立刻终止。

[root@CentOS-7 ~]# docker run --name test -it ubuntu bash
root@a445204315f3:/# 
root@a445204315f3:/#    # 先后按Ctrl-p和Ctrl-q键
[root@CentOS-7 ~]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
a445204315f3        ubuntu              "bash"              36 seconds ago      Up 34 seconds                           test
[root@CentOS-7 ~]# 

使用nsenter工具进入容器交互终端

nsenter启动一个新的shell进程(默认是/bin/bash), 同时会把这个新进程切换到和目标(target)进程相同的命名空间,相当于进入了容器内部。
nsenter包含在util-linux 2.23版本之后,而且运行需要root权限。
特别注意:通过exit命令或Ctrl+d键来退出容器终端时,所创建的容器不会终止。

[root@CentOS-7 ~]# rpm -qa |grep util-linux
util-linux-2.23.2-26.el7.x86_64
[root@CentOS-7 ~]# 
[root@CentOS-7 ~]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
a445204315f3        ubuntu              "bash"              2 hours ago         Up 2 hours                              test
[root@CentOS-7 ~]# 
[root@CentOS-7 ~]# PID=$(docker inspect --format "{{ .State.Pid }}" test)
[root@CentOS-7 ~]# 
[root@CentOS-7 ~]# nsenter --target $PID --uts --ipc --net --pid
[root@a445204315f3 ~]# 
[root@a445204315f3 ~]# exit
logout
[root@CentOS-7 ~]# 
[root@CentOS-7 ~]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
a445204315f3        ubuntu              "bash"              2 hours ago         Up 2 hours                              test
[root@CentOS-7 ~]# 

转载于:https://www.cnblogs.com/anliven/p/6771214.html

PS C:\Users\34537\dify\docker> docker compose up -d [+] Running 12/12 ✔ Network docker_default Created 0.1s ✔ Network docker_ssrf_proxy_network Created 0.0s ✔ Container docker-weaviate-1 Started 1.3s ✔ Container docker-sandbox-1 Started 1.5s ✔ Container docker-db-1 Healthy 4.0s ✔ Container docker-redis-1 Started 1.4s ✔ Container docker-ssrf_proxy-1 Started 1.5s ✔ Container docker-web-1 Started 1.5s ✔ Container docker-api-1 Started 4.7s ✔ Container docker-worker-1 Started 4.6s ✔ Container docker-plugin_daemon-1 Started 4.4s ✔ Container docker-nginx-1 Started 4.9s PS C:\Users\34537\dify\docker> docker compose ps NAME IMAGE COMMAND SERVICE CREATED STATUS PORTS docker-api-1 langgenius/dify-api:1.5.1 "/bin/bash /entrypoi…" api 14 seconds ago Up 9 seconds 5001/tcp docker-db-1 postgres:15-alpine "docker-entrypoint.s…" db 14 seconds ago Up 12 seconds (healthy) 5432/tcp docker-nginx-1 nginx:latest "sh -c 'cp /docker-e…" nginx 14 seconds ago Up 4 seconds 0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp docker-plugin_daemon-1 langgenius/dify-plugin-daemon:0.1.3-local "/bin/bash -c /app/e…" plugin_daemon 14 seconds ago Up 9 seconds 0.0.0.0:5003->5003/tcp docker-redis-1 redis:6-alpine "docker-entrypoint.s…" redis 14 seconds ago Up 13 seconds (health: starting) 6379/tcp docker-sandbox-1 langgenius/dify-sandbox:0.2.12 "/main" sandbox 14 seconds ago Up 13 seconds (health: starting) docker-ssrf_proxy-1 ubuntu/squid:latest "sh -c 'cp /docker-e…" ssrf_proxy 14 seconds ago Up 12 seconds 3128/tcp docker-weaviate-1 semitechnologies/weaviate:1.19.0 "/bin/weaviate --hos…" weaviate 14 seconds ago Up 13 seconds docker-web-1 langgenius/dify-web:1.5.1 "/bin/sh ./entrypoin…" web 14 seconds ago Restarting (0) 3 seconds ago docker-worker-1 langgenius/dify-api:1.5.1 "/bin/bash /entrypoi…" worker 14 seconds ago Up 9 seconds 5001/tcp PS C:\Users\34537\dify\docker> docker compose ps NAME IMAGE COMMAND SERVICE CREATED STATUS PORTS docker-api-1 langgenius/dify-api:1.5.1 "/bin/bash /entrypoi…" api 2 minutes ago Up 2 minutes 5001/tcp docker-db-1 postgres:15-alpine "docker-entrypoint.s…" db 2 minutes ago Up 2 minutes (healthy) 5432/tcp docker-nginx-1 nginx:latest "sh -c 'cp /docker-e…" nginx 2 minutes ago Restarting (1) 10 seconds ago docker-plugin_daemon-1 langgenius/dify-plugin-daemon:0.1.3-local "/bin/bash -c /app/e…" plugin_daemon 2 minutes ago Up 2 minutes 0.0.0.0:5003->5003/tcp docker-redis-1 redis:6-alpine "docker-entrypoint.s…" redis 2 minutes ago Up 2 minutes (healthy) 6379/tcp docker-sandbox-1 langgenius/dify-sandbox:0.2.12 "/main" sandbox 2 minutes ago Up 2 minutes (unhealthy) docker-ssrf_proxy-1 ubuntu/squid:latest "sh -c 'cp /docker-e…" ssrf_proxy 2 minutes ago Up 2 minutes 3128/tcp docker-weaviate-1 semitechnologies/weaviate:1.19.0 "/bin/weaviate --hos…" weaviate 2 minutes ago Up 2 minutes docker-web-1 langgenius/dify-web:1.5.1 "/bin/sh ./entrypoin…" web 2 minutes ago Restarting (0) 56 seconds ago docker-worker-1 langgenius/dify-api:1.5.1 "/bin/bash /entrypoi…" worker 2 minutes ago Up 2 minutes 5001/tcp PS C:\Users\34537\dify\docker> docker logs docker-web-1 PS C:\Users\34537\dify\docker> docker logs --tail 100 docker-web-1 PS C:\Users\34537\dify\docker> docker logs --previous docker-web-1 unknown flag: --previous See 'docker logs --help'. 其中docker-web-1一直在Restarting,并且关于web日志一直没反应,该怎么办(说中文)
最新发布
07-09
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