說明

宿主機需要安裝Docker和Docker-compose
建立3個容器：
主機名分別為host1、host2和ansible
host1和host2安裝python、openssh server
ansible安裝openssh server、openssh client、ansible

步驟

按如下目錄結構建立檔案

.
├── alpine
│   └── Dockerfile
├── ansible
│   └── Dockerfile
└── docker-compose.yml

alpine/Dockerfile內容為

FROM alpine:3.10

  RUN echo http://mirrors.aliyun.com/alpine/v3.10/main/ > /etc/apk/repositories && \

    echo http://mirrors.aliyun.com/alpine/v3.10/community/ >> /etc/apk/repositories

  RUN apk update && apk upgrade

RUN apk add --no-cache openssh-server tzdata python3 && \
    cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
    sed -i "s/#PermitRootLogin.*/PermitRootLogin yes/g
 
" /etc/ssh/sshd_config && \
    ssh-keygen -t rsa -P "" -f /etc/ssh/ssh_host_rsa_key && \
    ssh-keygen -t ecdsa -P "" -f /etc/ssh/ssh_host_ecdsa_key && \
    ssh-keygen -t ed25519 -P "" -f /etc/ssh/ssh_host_ed25519_key && \
    echo "root:root" | chpasswd

EXPOSE 22

CMD ["/usr/sbin/sshd
 
", "-D"]

ansible/Dockerfile內容為

FROM alpine:3.10

  RUN echo http://mirrors.aliyun.com/alpine/v3.10/main/ > /etc/apk/repositories && \

      echo http://mirrors.aliyun.com/alpine/v3.10/community/ >> /etc/apk/repositories

  RUN apk update && apk upgrade

 
RUN apk add --no-cache openssh-server tzdata ansible openssh && \
    cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
    sed -i "s/#PermitRootLogin.*/PermitRootLogin yes/g" /etc/ssh/sshd_config && \
    ssh-keygen -t rsa -P "" -f /etc/ssh/ssh_host_rsa_key && \
    ssh-keygen -t ecdsa -P "" -f /etc/ssh/ssh_host_ecdsa_key && \
    ssh-keygen -t ed25519 -P "" -f /etc/ssh/ssh_host_ed25519_key

RUN mkdir -p /etc/ansible && \
    echo -e "[dev]\nhost1\nhost2" >/etc/ansible/hosts && \
    ssh-keygen -t rsa -P "" -f ~/.ssh/id_rsa

EXPOSE 22

CMD ["/usr/sbin/sshd", "-D"]

docker-compose.yml內容為

version: "2.4"
services:
  host1:
    build: alpine
  host2:
    build: alpine
  ansible:
    build: ansible

執行下面的命令構建映象並啟動服務：

docker-compose up -d

進入ansible容器

docker-compose exec ansible sh

執行下面命令，複製公鑰到遠端機器：

ssh-copy-id host1
ssh-copy-id host2

會提示輸入密碼，密碼是root

使用

我們使用ping命令測試一下：

ansible dev -m ping

輸出類似下面的資訊：

host1 | SUCCESS => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python3.7"
    },
    "changed": false,
    "ping": "pong"
}

host2 | SUCCESS => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python3.7"
    },
    "changed": false,
    "ping": "pong"
}

轉載出處 有地方做了修改才正常使用