Ansible Common modules and APIs

Ansible Installation

Install Epel as a yum source for installing ansible (CentOS6.4):

RPM-UVH http://ftp.linux.ncsu.edu/pub/epel/6/i386/epel-release-6-8.noarch.rpm

Install Ansible:

Yum Install ansible-y

Configuration file:

Path:/etc/ansible/hosts
Configuration Description: Webservers is the group name, and the following IP or domain name is the host that belongs to the group.

[Webservers] 192.168. 1.111 192.168. 1.112 192.168. 1.113

Test:

Ansible webservers-m ping-k   # Ping the webservers group

Because the master and the host are not configured with the SSH certificate trust, you need to add the-K parameter when executing the ansible command, requiring a root (default) account password.

To configure the SSH certificate trust:
Main control side:
To generate a key pair:

SSH-KEYGEN-T RSA # All the way     to the return, in the/root/.ssh/directory will generate Id_rsa (private key), id_rsa.pub (public key) key pair

The managed host that sends the public key:

Ssh-copy-id-i/root/.ssh/id_rsa.pub [email protected]

Common modules

Command line call module format:

Ansible operation Target-M module name (default Module command)-a module parameter # Example:-M Ping

Help command:

ansible-Doc Module name # Example:ansible-doc Ping

1. Remote Command Module

Command: Execute remote shell commands
Script: Scripts stored on the host side of the controlled side, equivalent to Scp+shell
Shell: Execute script stored on the managed side
Cases:

' df-h ' # execute the df-h command on the controlled side ' /root/test.sh ' # Execute the test.sh script on the controlled side (test.sh script on the master side) ' /root/test.sh ' # Execute the test.sh script on the controlled side (test.sh script on the controlled side)

2. Copy Module

Copy: Copy files from the host to the managed side, similar to the SCP function
Cases:

' src=/root/test.py dest=/tmp owner=root group=root mode=0755 ' # Copy the test.py file from the host to the/TMP directory on the managed side, and specify the owner and permissions of the file

3. Stat Module

Stat: Get remote file status information, including Atime, CTime, Mtime, MD5, UID, GID, etc.
Cases:

' path=/etc/sysctl.conf ' # get the/etc/sysctl.conf file status information for the managed side

4. Get_url Module

Get_url: Enables the controlled end to download the specified URL, supports sha256sum checksum
Cases:

' url=http://www.baidu.com dest=/tmp/index.html mode=0440 force=yes ' # controlled end Download Baidu home page to/tmp/index.html

5. Software operation module (yum, APT)

Yum/apt:linux Platform software package management operations
Cases:

' Name=curl state=latest ' # The controlled end uses Yum to install the latest Curl ' Pkg=curl state=latest ' # The controlled end uses apt to install the latest Curl

6. Cron Module

Cron: Managed End cron Configuration
Cases:

" name= ' Check dirs ' hour= ' 5,2 ' job= ' ls-alh >/dev/null ' " # managed End cron Results: # Ansible:check dirs* 5,2 * * * LS-ALH >/dev/null

7. Mount Module

Mount: Managed side partition Mount
Cases:

' name=/mnt/data src=/dev/sd0 fstype=ext3 opts=ro state=present ' # mount the/dev/sd0 to/mnt/data with the right to RO

8. Service Module

Service: Managed terminal System Services management
Cases:

' name=httpd state=stopped ' # Close httpd Service ' name=httpd state=restarted ' #  'name=httpd state=started'# launch httpd service

9. Sysctl Package Management Module

SYSCTL: Controlled End sysctl Configuration
Cases:

' name= "Net.ipv4.ip_forward" value=1 sysctl_set=yes state=present reload=yes ' # set up route forwarding and take effect

10. User Service Module

User: Managed terminal system users
Cases:

" name=johnd Comment=hohn Doe " # Add user John " name=johnd state=absent Remove=yes " # Delete user John

Resources:

Liu Tians "Python Automated operations technology and best practices"

Ansible Common modules and APIs