Ansible随记

来自三线的随记
Admin讨论 | 贡献2021年7月6日 (二) 19:56的版本

For linux and kubernetes


Hosts config

[k8s]
k8s-node-1 ansible_ssh_host=172.16.139.102
k8s-node-2 ansible_ssh_host=172.16.139.103
k8s-node-3 ansible_ssh_host=172.16.139.104

[test]
192.168.1.250 ansible_ssh_port=1234
192.168.1.251 ansible_ssh_user=xxx ansible_ssh_pass=yyy


Module

authorized_key

user=root : 将密钥推送到远程主机的哪个用户下

key=’{{ lookup('file', '/root/.ssh/authorized_keys')}}’ : 指定要推送的密钥文件所在的路径

path=’/root/.ssh/authorized_keys’ [Default: (homedir)+/.ssh/authorized_keys] : 将密钥推送到远程主机的哪个目录下并重命名

manage_dir=no : 指定模块是否应该管理 authorized key 文件所在的目录。如果设置为 yes,模块会创建目录,以及设置一个已存在目录的拥有者和权限。如果通过 path 选项,重新指定了一个 authorized key 文件所在目录,那么应该将该选项设置为 no

exclusive [default: no] : 是否移除 authorized_keys 文件中其它非指定 key

state (Choices: present, absent) [Default: present] : present 添加指定 key 到 authorized_keys 文件中;absent 从 authorized_keys 文件中移除指定 key

ansible all -m authorized_key -a "user=root key='{{ lookup('file', '/root/.ssh/authorized_keys')}}' path='/root/.ssh/authorized_keys' manage_dir=no" -k


selinux

ansible k8s -m selinux -m selinux -a state=disabled

https://my.oschina.net/ozakilsc/blog/693023

shell

ansible k8s -m shell -a getenforce
ansible k8s -m shell -a hostname
ansible k8s -m shell -a "iptables -F && iptables -X && iptables -F -t nat && iptables -t nat -X && iptables -t raw -F && iptables -t raw -X && iptables -t mangle -F && iptables -t mangle -X"
ansible k8s -m shell -a "modprobe bridge && modprobe br_netfilter && sysctl -p /etc/sysctl.d/kubernetes.conf"
ansible k8s -m shell -a "timedatectl set-timezone Asia/Shanghai && timedatectl status"
ansible all -m shell -a "rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm"
ansible all -m shell -a "yum --enablerepo=elrepo-kernel install -y kernel-lt"
ansible all -m shell -a "grub2-set-default 0"


ping

(用于判断远程客户端是否在线)

ansible k8s -m ping


command

(ansible default module)


yum

(default state:installed)

ansible k8s -m yum -a 'name=vim state=installed'
ansible k8s -m yum -a 'name=vim'
ansible k8s -m yum -a 'name=vim, httpd'
ansible k8s -km yum -a "name=yum-utils,chrony,conntrack,ipvsadm,ipset,jq,iptables,curl,sysstat,libseccomp,wget,socat,git"
ansible k8s -m yum -a 'name=vsftpd  state=removed'
ansible k8s -m yum -a "name=bridge-utils"
ansible  all  -m yum -a "name=epel-release,chrony,conntrack,ipvsadm,ipset,jq,iptables,curl,sysstat,libseccomp,wget,socat,git,bind-utils state=installed"


service

ansible k8s -m service -a " name='nginx' enabled=yes"
ansible k8s -m service -a "name=httpd state=started"
ansible k8s -m service -a "name=firewalld state=stopped enabled=no"
ansible k8s -km service -a "name=postfix state=stopped enabled=no"
ansible k8s -m service -a "name=chronyd enabled=yes state=started"


copy

ansible k8s -m copy -a "src=./kubernetes.conf dest=/etc/sysctl.d/"


file

ansible k8s -m file -a "path=/opt/k8s/bin state=directory"
ansible k8s -m file -a "path=/opt/k8s/work state=directory"
ansible k8s -m file -a "path=/opt/k8s/work state=absent"


others

ansible k8s -m shell -a "rpm --import file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7"


Playbook

copy

---
- hosts: all
  tasks:
    - name: copy kubernetes server executeable file to master node
      copy:
        src: '{{ item.src }}'
        dest: '{{item.dest}}'
        mode: '0744'
      with_items:
       - {src: './apiextensions-apiserver', dest: '/opt/k8s/bin/'}
       - {src: './kubeadm', dest: '/opt/k8s/bin/'}
       - {src: './kube-apiserver', dest: '/opt/k8s/bin/'}
       - {src: './kube-controller-manager', dest: '/opt/k8s/bin/'}
       - {src: './kubectl', dest: '/opt/k8s/bin/'}
       - {src: './kubelet', dest: '/opt/k8s/bin/'}
       - {src: './kube-proxy', dest: '/opt/k8s/bin/'}
       - {src: './kube-scheduler', dest: '/opt/k8s/bin/'}
       - {src: './mounter', dest: '/opt/k8s/bin/'}


Other operations

use the passphrase protected ssh private key without input the password

使用带密码保护的私钥并且避免每次都要输入私钥密码

$ eval `ssh-agent`  # you might have agent already running so this might not be needed
$ ssh-add ~/.ssh/id_rsa