docker学习

yum install -y docker

nsenter belongs to util-linux


docker run --name mydocker

 docker inspect -f "{{ .State.Pid  }}" mydocker

nsenter -t 14301 -m -u -i -n -p



[root@node1 ~]# ./docker.sh mydocker
root@ad347571682b:/# pwd
/
root@ad347571682b:/# exit
logout
[root@node1 ~]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
ad347571682b        docker.io/nginx     "/bin/bash"         25 minutes ago      Up 15 minutes       80/tcp, 443/tcp     mydocker
[root@node1 ~]# cat docker.sh
#!/bin/bash

# Use nsenter to access docker

docker_in(){
    NAME_ID=$1
    PID=$(docker inspect -f "{{ .State.Pid  }}" $NAME_ID)
    nsenter -t $PID -m -u -i -n -p
}

docker_in $1



[root@node1 ~]# docker exec mydocker ps
  PID TTY          TIME CMD
  165 ?        00:00:00 ps


[root@node1 ~]# docker exec mydocker ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.0  20236  1908 ?        Ss+  06:54   0:00 /bin/bash
root       173  0.0  0.0  17492  1132 ?        Rs   07:12   0:00 ps aux
[root@node1 ~]# docker exec -it mydocker /bin/bash
root@ad347571682b:/# exit
exit
[root@node1 ~]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
ad347571682b        docker.io/nginx     "/bin/bash"         28 minutes ago      Up 18 minutes       80/tcp, 443/tcp     mydocker
[root@node1 ~]#


docker exec and docker.sh 都能进入容器并且exit不会关闭容器


    rm        Remove one or more containers
    rmi       Remove one or more images

[root@node1 ~]# docker run --rm centos date

网络随机映射，-P随机映射，-p指定映射，多个-p可以多端口映射

docker run -d -p 192.168.3.3:81:80 --name mynginx nginx

[root@node1 ~]# docker port mynginx
80/tcp -> 192.168.3.3:81

docker ps 也能看到多个端口


[root@node1 /]# docker run -d --name nginx-volume-test1 -v /data nginx


docker run -d --name nginx-volume-test2 -v /data/docker:/data nginx

 共享容器
[root@node1 /data/docker]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
0e4589cafb94        nginx               "nginx -g 'daemon off"   12 minutes ago      Up 12 minutes       80/tcp, 443/tcp     nginx-volume-test2
6369516a1912        nginx               "nginx -g 'daemon off"   15 minutes ago      Up 15 minutes       80/tcp, 443/tcp     nginx-volume-test1
[root@node1 /data/docker]# docker run -it --name valume-test3 --volumes-from nginx-volume-test2 centos /bin/bash


[root@node1 ~]# docker run  -it --name nfsc --rm --volumes-from nfs centos /bin/bash


docker run --name mynginx -it centos
进容器，rpm -ivh epel
yum install -y nginx
/etc/nginx/nginx.conf
daemon off

[root@node1 ~]# docker commit -m "mynginx" 71d04e9e2b55 wis/nginx:v1
sha256:0e0458ff3f0d754dcbe3edb1f94e0565d728228103860c71511acd84b367d467
[root@node1 ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
wis/nginx           v1                  0e0458ff3f0d        5 seconds ago       349.8 MB

[root@node1 ~]# docker run -d -p81:80 --name nginxv1 wis/nginx:v1 nginx




[root@node1 /opt/dockerfile/nginx]# cat Dockerfile
# This Dockerfile

# Base image
FROM centos

# Maintainer
MAINTAINER Wis.Wang xxx@qq.com

# Commands
RUN rpm -ivh http://mirrors.aliyun.com/epel/epel-release-latest-7.noarch.rpm
RUN yum install -y nginx && yum clean all
RUN echo "daemon off;" >> /etc/nginx/nginx.conf
ADD index.html /usr/share/nginx/html/index.html
EXPOSE 80
CMD ["nginx"]

[root@node1 /opt/dockerfile/nginx]# pwd
/opt/dockerfile/nginx
[root@node1 /opt/dockerfile/nginx]# cat index.html
DengGOD

[root@node1 /opt/dockerfile/nginx]# docker build -t mynginx:v2 .

docker run --rm --name mynginxv3  -p 82:80 mynginx:v2

centos-ssh

app

requirements.txt

python-demo.ini


[root@node1 ~/docker]# tree .
.
|-- app
|   |-- shop-api
|   |   |-- Dockerfile
|   |   |-- app-supervisor.ini
|   |   |-- app.py
|   |   |-- requirements.txt
|   |   `-- supervisord.conf
|   `-- xxx-api
|-- runtime
|   |-- java
|   |-- php
|   |-- python
|   `-- python-ssh
|       `-- Dockerfile
`-- system
    |-- Dockerfile
    |-- a
    `-- epel.repo





https://github.com/vmware/admiral/blob/master/auth/src/main/java/com/vmware/admiral/auth/AuthInitialBootService.java