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docker创建ansible

　
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文章目录

环境

Centos 7.6

Docker version 18.09.6, build 481bc77156

关键点：

  • Dockerfile 编写优化
  • Docker-compose.yml 编写
  • ansible-ssh 免密钥登录
  • 容器间22端口互通

创建文件夹

mkdir -p /root/docker/ansible-demo && /root/docker/ansible-demo/volume2 && cd ~/docker/ansible-demo

创建dockerfile、docker-compose

Dockerfile 文件

# Set the base p_w_picpath to centos
FROM centos:latest
MAINTAINER osbing osbing@china.net
#mount volume
VOLUME ["/root/docker/ansible-demo/volume2"]
################## BEGIN INSTALLATION ######################
#install EPEL
RUN rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm \
&& rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 \
&& yum install -y yum-priorities
# Install
#RUN yum clean all
RUN yum install -y sudo
RUN yum install -y \
net-tools \
openssh-clients \
openssh-server \
ansible \
vim
################## END INSTALLATION ######################
# 将sshd的UsePAM参数设置成no
RUN sed -i 's/UsePAM yes/UsePAM no/g' /etc/ssh/sshd_config
# 修改root用户密码
RUN echo "root:benny"|chpasswd
RUN ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
RUN ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
# 启动sshd服务并且暴露22端口
RUN mkdir /var/run/sshd
EXPOSE 22
ENTRYPOINT ["/usr/sbin/sshd","-D"]
# no cache创建镜像
#ddocker build --no-cache  -t osbing/centos_sshd:0.2 .
# 创建容器。特权模式--privileged=true
docker run -d -p 9021:22 --privileged=true --name ansible-controller1 osbing/centos_sshd:0.2
docker run -d -p 9021:22 --privileged=true --name ansible-controller osbing/centos_sshd:0.2
docker run -d -p 9022:22 --privileged=true --name ansible-node2 osbing/centos_sshd:0.2
docker run -d -p 9023:22 --privileged=true --name ansible-node3 osbing/centos_sshd:0.2

或者使用Docker-compose文件创建容器

ansible-controller:
   p_w_picpath: osbing/centos_sshd:0.2
   ports:
     - "9021:22"
   environment:
     HOSTNAME:ansible-controller
ansible-node2:
   p_w_picpath: osbing/centos_sshd:0.2
   ports:
     - "9022:22"
   environment:
     HOSTNAME:ansible-node2
 
ansible-node3:
   p_w_picpath: osbing/centos_sshd:0.2
   ports:
     - "9023:22"
   environment:
      HOSTNAME:ansible-node3

ssh连接到ansible-controller进行配置和管理节点

# ssh连接到ansible-controller 进行修改
ssh root@127.0.0.1 -p 9021
vim /etc/ansible/hosts
# 生成公钥
ssh-keygen

拷贝公钥到被管理节点的主机上

# ssh-copy-id 拷贝公钥到被管理节点的主机上
ssh-copy-id -i root@172.17.0.12
ssh-copy-id -i root@172.17.0.13
ssh-copy-id -i root@172.17.0.14

尝试在Ansible服务端运行命令

例子1：检查Ansible节点的运行时间（uptime）

#ping测试
ansible -m ping "test-servers"
#获取系统运行时间
ansible 'test-servers' -m command -a "uptime"

例子2：检查节点的内核版本

#获取内核版本
ansible 'test-ser

例子3：给节点增加用户

#增加用户
ansible "test-servers" -m command -a "useradd mark"
ansible "test-servers" -m command -a "grep mark /etc/passwd"

例子4：重定向输出到文件中

[root@c9db9b7e94b0 ansible]# ansible "test-servers" -m command -a "df -Th" > /tmp/command-output.txt
[root@c9db9b7e94b0 ansible]# cat /tmp/command-outp

原文链接：docker创建ansible，转载请注明来源！

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