[root@centos7 ~]# yum install -y ansible已加载插件：fastestmirrorLoading mirror speeds from cached hostfile * base: mirrors.bfsu.edu.cn * extras: mirrors.bfsu.edu.cn * updates: mirrors.neusoft.edu.cnbase | 3.6 kB 00:00:00extras | 2.9 kB 00:00:00updates | 2.9 kB 00:00:00updates/7/x86_64/primary_db | 13 MB 00:00:10没有可用软件包 ansible。错误：无须任何处理
需要先安装
[root@centos7 ~]# yum install -y epel-release[root@centos7 ~]# yum install -y ansible
配置机器信息 root账号登录ansible机器，创建文件夹playbooks；playbooks目录下创建名为hosts的文件，内容如下，cdh-group是群组名，该群组内有一个机器配置信息，包含名称、IP地址，SSH端口，SSH账号密码等：[root@centos7 playbooks]# pwd/root/playbooks[root@centos7 playbooks]# cat hosts[k8s-group]master0 ansible_host=172.70.10.161 ansible_port=22 ansible_user=root ansible_password=******master1 ansible_host=172.70.10.162 ansible_port=22 ansible_user=root ansible_password=******node1 ansible_host=172.70.10.163 ansible_port=22 ansible_user=root ansible_password=******node2 ansible_host=172.70.10.164 ansible_port=22 ansible_user=root ansible_password=******node3 ansible_host=172.70.10.165 ansible_port=22 ansible_user=root ansible_password=******node4 ansible_host=172.70.10.166 ansible_port=22 ansible_user=root ansible_password=******
laybooks目录下创建名为ansible.cfg的文件，内容如下，这是个ansible的配置文件，执行ansible命令时用到，这里面指定了主机信息在hosts文件中查找：[root@centos7 playbooks]# cat ansible.cfg[defaults]inventory = ~/playbooks/hostshost_key_checking = Falseforks = 6
体验[root@centos7 playbooks]# ansible -i /root/playbooks/hosts all -m shell -a "free -g"[WARNING]: Invalid characters were found in group names but not replaced, use -vvvv to see detailsmaster0 | CHANGED | rc=0 >> total used free shared buff/cache availableMem: 15 0 12 0 2 14Swap: 7 0 7master1 | CHANGED | rc=0 >> total used free shared buff/cache availableMem: 15 0 12 0 2 14Swap: 7 0 7node2 | CHANGED | rc=0 >> total used free shared buff/cache availableMem: 15 0 12 0 2 14Swap: 7 0 7node4 | CHANGED | rc=0 >> total used free shared buff/cache availableMem: 15 0 12 0 2 14Swap: 7 0 7node3 | CHANGED | rc=0 >> total used free shared buff/cache availableMem: 15 0 12 0 2 14Swap: 7 0 7node1 | CHANGED | rc=0 >> total used free shared buff/cache availableMem: 15 0 12 0 2 14Swap: 7 0 7
体验playbook(base) [root@node1 playbooks]# cat install_docker.yaml- name: install docker hosts: k8s-group gather_facts: True tasks: - name: add repo shell: cd ~ && mkdir tmp && cd ~/tmp && wget http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo && mv docker-ce.repo /etc/yum.repos.d/ - name: install docker yum: name=docker-ce - name: add systemctl shell: systemctl start docker && systemctl enable docker
执行：
(base) [root@node1 playbooks]# ansible-playbook install_docker.yaml[WARNING]: Invalid characters were found in group names but not replaced, use -vvvv to see detailsPLAY [install k8s] ****************************************************************************************************************************************************************************************TASK [Gathering Facts] ************************************************************************************************************************************************************************************ok: [node4]ok: [node2]ok: [node1]TASK [add repo] *******************************************************************************************************************************************************************************************changed: [node4]changed: [node2]changed: [node1]TASK [install docker] *************************************************************************************************************************************************************************************ok: [node4]ok: [node2]ok: [node1]TASK [add systemctl] **************************************************************************************************************************************************************************************changed: [node2]changed: [node4]changed: [node1]PLAY RECAP ************************************************************************************************************************************************************************************************node1 : ok=4 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0node2 : ok=4 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0node4 : ok=4 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
备注：
# ansible-playbook a.yml --syntax-check #检查yaml文件的语法是否正确# ansible-playbook a.yml --list-task #检查tasks任务# ansible-playbook a.yml --list-hosts #检查生效的主机# ansible-playbook a.yml --start-at-task='Copy Nginx.conf' #指定从某个task开始运行