Shulou(Shulou.com)06/03 Report--

1. What is Ansible?

Ansible is a set of modules in python and a set of automation tools in the system, which only need to use ssh protocol to connect and can be used for system management, automatic command execution and other tasks.

2. Why use Ansible?

It can realize batch system operation configuration, batch software service deployment, batch file data distribution, batch system information collection.

3, the meaning of using Ansible

Improve work efficiency (deploy integrated architecture) improve work accuracy, reduce maintenance costs and reduce repetitive work

4. Install and deploy

No configuration file (no configuration required) no need to start the service client no need to deploy tasks

5. Install Ansible

Yum-y install ansible

6. Learn the ansible host list

Vi / etc/ansible/hosts

In the SSH optimization section of the previous unit, we have changed the port to log in with a key, so write here otherwise, write normally

7, learn how to call Ansible module

The first thing is to get through the ssh remote function. Ansible is a batch management based on ssh communication.

1) ping module

Ansible host group name-m module name

Ansible nfs-m ping calls ping module

2) approximately equal to the omnipotent module shell (forget this command, ansible supports 2843 modules, each command has its own specialized module, don't use shell instead)

Ansible nfs-m shell-a "various commands"

This kind of syntax call module is more detailed, has more parameters, and has a big point that it will not be executed repeatedly. For example, you execute scripts to 100 clients on the management side.

If an error is reported in the middle, it can be executed directly again without reporting an error (ansible script)

Features: 1) indentation represents the relationship between different levels

2) there are strict requirements on the index

1) file module (the specific parameters of each module are in the official documentation. You must be able to read https://docs.ansible.com/ansible/latest/modules)

Ansible nfs-m file-a "path=/tmp/oldboy state=directory mode=644 owner=oldboy group=oldboy"

2) copy module

Ansible nfs-m copy-a "src=/etc/ssh/sshd_config dest=/tmp/ mode='644'"

3) script script module

Ansible nfs-m script-a "/ server/scripts/xx.sh"

4) user user module (create www users and groups uid and gid equals 666, described as oldboy, no home directory, / sbin/nologin)

Ansible nfs-m group-a "name=www gid=666"

Ansible nfs-m user-a "name=www uid=666 comment=oldboy shell=/sbin/nologin create home=no"

5) cron module

Ansible nfs-m cron-a 'name= "ntpdate" minute= "* / 5" job= "ntpdate time1.aliyun.com"'

6) yum module

Ansible nfs-m yum-a "name=ntpdate state=lastest"

Example 1: build NFS service

NFS server:

#! / bin/bash ansible nfs- m group-a "name=www gid=666 state=present" ansible nfs- m user-a "name=www uid=666 group=666 shell=/sbin/nologin create_home=no" ansible nfs- m yum-a "name=nfs-utils" ansible nfs- m file-a "path=/data state=directory" Ansible nfs-m copy-a "src=exports dest=/etc/exports backup=yes" ansible nfs-m service-a "name=rpcbind state=started enabled=yes" ansible nfs-m service-a "name=nfs state=started enabled=yes" ansible nfs-m shell-a "showmount-e"

NFS client:

#! / bin/bash ansible nfs_client-m group-a "name=www gid=666 state=present" ansible nfs_client-m user-a "name=www uid=666 group=666 shell=/sbin/nologin create_home=no" ansible nfs_client-m yum-a "name=nfs-utils" ansible nfs_client-m file-a "path=/data state=directory" Ansible nfs_client-m service-a "name=rpcbind state=started enabled=yes" ansible nfs_client-m shell-a "showmount-e 172.16.1.31" ansible nfs_client-m mount-a "src=172.16.1.31:/data path=/data fstype=nfs opts=defaults state=mounted"

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