Ansible随记
For linux and kubernetes
Hosts config
[cluster1_controller] 10.219.235.210 10.219.235.213 10.219.235.214 [cluster1_compute] 10.219.235.[215:219] [cluster1_nodes:children] cluster1_controller cluster1_compute [cluster1_nodes:vars] ansible_ssh_user=guest2admin ansible_ssh_pass=@users ansible_python_interpreter=/usr/bin/python ansible_ssh_common_args: -c aes256-cbc ansible_become_password: root@root@su ansible_become_method: su ansible_become_exe: sudo su - ############################################# [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 [other-test] 192.168.1.250:1234
Ansible command parameters
-f 'FORKS', --forks 'FORKS' specify number of parallel processes to use (default=5)
Module
authorized_key 模块实现节点批量免密
module 简要参数说明:
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')}}’ : 指定要推送的公钥文件所在的路径(常用应该是 id_rsa.pub )
path=’/root/.ssh/authorized_keys’ : 将密钥推送到远程主机的哪个目录下并重命名 [Default: (user home dir)+/.ssh/authorized_keys]
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 : 是否移除 authorized_keys 文件中其它非指定 key [default: no]
state (Choices: present, absent) : present 添加指定 key 到 authorized_keys 文件中;absent 从 authorized_keys 文件中移除指定 key [Default: present]
-k : 本次操作通过密码认证节点
ps: 如果是第一次ssh连接对端节点,可以考虑 ssh-keyscan -H ${node_ip} >> ~/.ssh/known_hosts 批量添加节点ssh指或者直接将ansible host_key_checking 设置为False (ssh-keyscan 中 -H参数代表将相关指纹和主机名结果都进行哈希化加密)
command line example:
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"
自动切到root用户(-b)
ansible all -b -m shell -a "cat <<< \$(jq '. + {\"bip\": \"192.168.0.1/28\"}' /etc/docker/daemon.json) > /etc/docker/daemon.json"
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/"
ansible all -m copy -a "src=./authorized_keys dest=~/.ssh/authorized_keys mode=600" -k
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(本次会话生效)
$ eval `ssh-agent` # you might have agent already running so this might not be needed $ ssh-add ~/.ssh/id_rsa