如何通过puppet管理远程docker容器并配置puppet和实现变更

这篇文章将为大家详细讲解有关如何通过puppet管理远程docker容器并配置puppet和实现变更，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。

前提准备：

1.master和docker节点上分别安装好puppet master和puppet agent；

2.docker节点上安装好docker1.2.0、nsenter（被脚本用于连接容器），并pull一个镜像：training/webapp

master上的准备工作：

创建docker模块：

mkdir -p /etc/puppet/modules/docker/{manifests,files,templates}vi /etc/puppet/modules/docker/manifests/init.pp#编写docker类class docker {    exec { "dockerlaunch" :        command => "/usr/bin/docker run -d -p 1000:5000 --name webbase training/webapp python app.py && /usr/bin/docker run -d -p 2000:5000 --name web1 --link webbase:webbase training/webapp python app.py",         }             exec { "dockerlogs" :        command => "/bin/mkdir -p /var/log/dockerlaunch && /usr/bin/docker inspect webbase >> /var/log/dockerlaunch/webbase.log && /usr/bin/docker inspect web1 >> /var/log/dockerlaunch/web1.log",         }             file { "/root/status.log" :        ensure  => file,        mode    => '740',        content => "docker container is running:webbase and web1 please use broswer access the ip address of docker.hzg.com and the 1000 or the 2000 port.You can use the control.sh script help you to manage the container",         }             file { "/root/control.sh" :        ensure  => file,        mode    => '1777',        source  => "puppet:///modules/docker/control.sh",         }             notify { "Docker container is running on node $fqdn !": }}

编写管理脚本，并放置到/etc/puppet/modules/docker/files目录中：

vi control.sh#脚本如下#!/bin/bash#used for access the specific container#written by Hochikongwhile truedo{read -p "What you want to do?try input 'help' to get some tips(please input the words in ''): " whatif [ $what = 'help' ];then   echo "################################################################################################################################";   echo "                                            The helping information about this script                                           ";   echo "################################################################################################################################";   echo "COMMAND                                       INFO                                                                              ";   echo "################################################################################################################################";   echo "'status'                                      get the info about the running containers.                                        ";   echo "'access'                                      access the specific contianer.                                                    ";   echo "'manage'                                      manage the contianer,such as 'start','stop' and 'delete'.                         ";   echo "'exit'                                        exit this script.                                                                 ";   echo "'statusa'                                     show the infomation about all containers.                                         ";             echo "'statusl'                                     show the latest infomation about container.                                       ";   echo "################################################################################################################################";   echo "MAINCOMMAND                  SUBCOMMAND                  INFO                                                                   ";   echo "################################################################################################################################";   echo "'manage'                     'start'                     launch a exist contianer                                               ";   echo "'manage'                     'stop'                      stop a running container                                               ";   echo "'manage'                     'delete'                    detele a not-running container                                         ";   echo "'manage'                     'status'                    get the info about the running containers                              ";   echo "'manage'                     'statusa'                   show the infomation about all containers.                              ";   echo "'manage'                     'statusl'                   show the latest infomation about container.                            ";   echo "################################################################################################################################";fi      if [ $what = 'status' ];then    echo "The running containers are:\n";    docker ps;fiif [ $what = 'statusa' ];then     echo "All containers's status:\n";    docker ps -a;fiif [ $what = 'statusl' ];then    echo "The latest infomation about containers:\n";    docker ps -l;fi      if [ $what = 'access' ];then    read -p "Please input the specific container's name:" name;    CPID=$(docker inspect --format '{{.State.Pid}}' $name);    nsenter --target $CPID --mount --uts --ipc --net --pid;fiif     [ $what = 'manage' ];then    while true        do        {            read -p "Please input the container name which you want to manage,or 'exit',or 'help'?: " name2;                if [ $name2 = 'help' ];        then            echo "#############################################################################################################";        echo "          SUBCOMMAND                  INFO                                                                   ";        echo "#############################################################################################################";        echo "          'start'                     launch a exist contianer                                               ";        echo "          'stop'                      stop a running container                                               ";        echo "          'delete'                    detele a not-running container                                         ";        echo "          'status'                    get the info about the running containers                              ";        echo "          'statusa'                   show the infomation about all containers.                              ";        echo "          'statusl'                   show the latest infomation about container.                            ";        echo "#############################################################################################################";                break;        fi                      if [ $name2 = 'status' ];        then            echo "Running container:";       docker ps;continue;        fi                      if [ $name2 = 'exit' ];        then            echo "Exiting";           break;        fi                if [ $name2 = 'statusa' ];        then             echo "All infomation about containers:\n";                docker ps -a;continue;        elif [ $name2 = 'statusl' ];        then            echo "The latest infomation about containers:\n";                docker ps -l;continue;        fi                  read -p "Do you want to 'start' or 'stop' or 'delete' your container?: " what2;                if [ $what2 = 'start' ];    then        echo "Notice:Please make sure this container is not running";        docker start $name2;continue    elif [ $what2 = 'stop' ];    then        echo "Notice:container is stopping";        docker stop $name2;continue;    elif [ $what2 = 'delete' ];    then        echo "Notice:You cannot delete a running container,if the container is running,please stop it first!";        docker rm $name2;continue;        else            echo "Error:Command Error,no such command!";continue;    fi                  }donefiif [ $what = 'exit' ];then     exit;fi}done

编辑/etc/puppet/manifests/nodes/docker.hzg.com.pp,加载docker类：

node 'docker.hzg.com' {    include docker}

编辑/etc/puppet/manifests/site.pp,加载docker节点的配置，增加这么一行：

import "nodes/docker.hzg.com.pp"

编辑/etc/puppet/fileserver.conf，授权docker对modules和files的访问，添加内容：

[files]  path /etc/puppet/files  allow docker.hzg.com#  allow *.example.com#  deny *.evil.example.com#  allow 192.168.0.0/24[files]  path /etc/puppet/modules  allow *.hzg.com

编辑/etc/puppet/puppet.conf，在[main]那一段增加以下内容（可选）：

modulepath = /etc/puppet/modules

PS：因为我使用puppet kick实现配置，要为agent做点配置工作：

agent上：

编辑puppet.conf，在[agent]那段增加以下内容（可选）：

listen = true

实现配置：

master上：

root@workgroup:~# puppet kick docker.hzg.comWarning: Puppet kick is deprecated. See http://links.puppetlabs.com/puppet-kick-deprecationWarning: Failed to load ruby LDAP library. LDAP functionality will not be availableTriggering docker.hzg.comGetting statusstatus is successdocker.hzg.com finished with exit code 0Finished

因为我没有配置LDAP，所以有些警告内容。

检查docker节点上的信息：

root@docker:~# lsBACKUPDockerfile  control.sh  Dockerfile  hzg.sh  init.pp  status.log  test2.sh  test.py  util-linux-2.24root@docker:~# cd /var/log/dockerlaunch/root@docker:/var/log/dockerlaunch# lsweb1.log  webbase.logroot@docker:/var/log/dockerlaunch# cd ~root@docker:~# docker psCONTAINER ID        IMAGE                    COMMAND             CREATED              STATUS              PORTS                    NAMES050ebb07cf25        training/webapp:latest   "python app.py"     About a minute ago   Up About a minute   0.0.0.0:2000->5000/tcp   web1                   0ef5d56e4c89        training/webapp:latest   "python app.py"     About a minute ago   Up About a minute   0.0.0.0:1000->5000/tcp   web1/webbase,webbase

可以看到相应的东西都创建了。

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