使用 ansible 安装 NGINX

官方文档:https://docs.ansible.com/ansible/latest/index.html
1.修改主机名

hostname master1 #192.168.67.11
hostname master2 #192.168.67.12

2.ssh-keygen做免密

[root@master1 etc]# ssh-keygen -t rsa
一路回车
[root@master1 etc]# ssh-copy-id root@192.168.67.12

3.添加域名解析

[root@master1 etc]# cat <<EOF >> /etc/hosts
192.168.67.11 master1
192.168.67.12 master2
EOF
[root@master1 etc]# ssh root@192.168.67.12
[root@master2 etc]# cat <<EOF >> /etc/hosts
192.168.67.11 master1
192.168.67.12 master2
EOF

yum安装epel源和ansible #参考官方安装文档:https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html#installing-ansible-on-rhel-centos-or-fedora

[root@master1 etc]# yum install -yq epel-release && sudo yum install -yq ansible
[root@master1 ansible-nginx]# ansible --version
ansible 2.9.25
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.5 (default, Oct 14 2020, 14:45:30) [GCC 4.8.5 20150623 (Red Hat 4.8.5-44)]

编写写安装nginx的yml文件 #参考示例:https://github.com/ansible/ansible/blob/stable-2.11/examples/ansible.cfg 示例:https://github.com/ansible/ansible-examples

[root@master1 etc]# mkdir $HOME/ansible-nginx/tasks/
[root@master1 etc]# cat <<EOF > $HOME/ansible-nginx/deploy.yml
- hosts: nginx
  tasks:
    - include: 'tasks/install_nginx.yml'
EOF
[root@master1 etc]# cat <<EOF > $HOME/ansible-nginx/tasks/install_nginx.yml
- name: NGINX | Installing NGINX repo rpm
  yum:
    name: http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
- name: NGINX | Installing NGINX
  yum:
    name: nginx
    state: latest
- name: NGINX | Starting NGINX
  service:
    name: nginx
    state: started
EOF
[root@master1 etc]# mv /etc/ansible/hosts /etc/ansible/hosts.backup
[root@master1 etc]# cat <<EOF > /etc/ansible/hosts
[nginx]
master2
EOF

Ansible 提示输入 SSH 密码，输出如下。recap 中显示 failed=0 这条信息，意味着部署成功了。

[root@master1 etc]# ansible-playbook --ask-pass $HOME/ansible-nginx/deploy.yml
SSH password: 

PLAY [nginx] ************************************************************************************************************************

TASK [Gathering Facts] **************************************************************************************************************
ok: [master2]

TASK [NGINX | Installing NGINX repo rpm] ********************************************************************************************
changed: [master2]

TASK [NGINX | Installing NGINX] *****************************************************************************************************
changed: [master2]

TASK [NGINX | Starting NGINX] *******************************************************************************************************
changed: [master2]

PLAY RECAP **************************************************************************************************************************
master2                    : ok=4    changed=3    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   

查看效果

[root@master2 kubelet]# ps -ef | grep nginx
root      48337      1  0 15:04 ?        00:00:00 nginx: master process /usr/sbin/nginx
nginx     48338  48337  0 15:04 ?        00:00:00 nginx: worker process
nginx     48339  48337  0 15:04 ?        00:00:00 nginx: worker process
nginx     48340  48337  0 15:04 ?        00:00:00 nginx: worker process
nginx     48341  48337  0 15:04 ?        00:00:00 nginx: worker process
root      48480  14520  0 15:05 pts/1    00:00:00 grep --color=auto nginx