Friday, June 9, 2017

Ansible Playbook with multiple lists in the variables with multiple with_items calls in the tasks example

Ansible Playbook with multiple lists in the variables with multiple with_items calls in the tasks

The sample playbook looks like this. This has four lists defined in the vars: section. 
First is the list of the packages to be installed name of the list being "packages" in the playbook.
Second list having name as "stopservice" is the list of the services to be stopped
Third list is the list of the services to be started also enabled with the name of the list being as "startservice"
As can be seen in the playbook the call to each of the items of a list is in the form of 

"{{item.name}}"
with_items  takes the values as
"{{packages}}" or "{{startservice}}" or "{{stopservice}}" as the name of the list



The fourth list is the list of the files to be got from a URL and to be copied to a certain location on the servers
The list name is "urls"
The name is the identifier
url is the URL wherefrom the file can be downloaded. 
dest is the location on the server on where the file has to be copied to while being received using the get_url module of ansible

here the important values to be passed to the get_url module are "url" and "dest"
the "url" and "dest" are different for each item in the list "urls"

The pairs of url and dest are passed to the get_url module as 

get_url:
  url: "{{item.url}}"
  dest: "{{item.dest}}"
with_items: "{{urls}}"

Also note the use of the "force" option of the get_url to ensure that the target file is overwritten when the contents at the source url change.

Here is the example playbook


[devops@ansible playbooks]$ cat firstplaybook.yml
---
- name: install packages
  hosts: all
  vars:
    - packages:
      - name: chrony
      - name: bash-completion
      - name: yum-utils
      - name: bind-utils
      - name: net-tools
      - name: ntp
      - name: firewalld
      - name: wget
      - name: curl
      - name: unzip

    - stopservice:
      - name: firewalld

    - startservice:
      - name: chronyd
      - name: ntpd

    - urls:
      - name: hosts
        url: http://ansible.lab.example.com/config/hosts
        dest: /etc/hosts
      - name: nsswitch.conf
        url: http://ansible.lab.example.com/config/nsswitch.conf
        dest: /etc/nsswitch.conf
      - name: profile
        url: http://ansible.lab.example.com/config/profile
        dest: /etc/profile
      - name: resolv.conf
        url: http://ansible.lab.example.com/config/resolv.conf
        dest: /etc/resolv.conf
      - name: selinuxconfig
        url: http://ansible.lab.example.com/config/selinuxconfig
        dest: /etc/selinux/config
      - name: yum.conf
        url: http://ansible.lab.example.com/config/yum.conf
        dest: /etc/yum.conf



  tasks:
    - name: install package
      yum:
        name: "{{item.name}}"
        state: latest
      with_items:
        - "{{packages}}"

    - name: stop the services
      service:
        state: stopped
        enabled: false
        name: "{{item.name}}"
      with_items:
        - "{{stopservice}}"

    - name: start and enable services
      service:
        name: "{{item.name}}"
        state: started
        enabled: true
      with_items:
        - "{{startservice}}"

    - name: copy configuration files from the URLs
      get_url:
        url: "{{item.url}}"
        dest: "{{item.dest}}"
        use_proxy: no
        force: yes
      with_items:
        - "{{urls}}"



[devops@ansible playbooks]$


----------------------------------

Run of the Playbook
----------------------------------


[devops@ansible playbooks]$ ansible-playbook firstplaybook.yml

PLAY [install packages] ********************************************************************************************

TASK [Gathering Facts] *********************************************************************************************
ok: [ansible.lab.example.com]
ok: [server2.lab.example.com]
ok: [server1.lab.example.com]
ok: [server3.lab.example.com]

TASK [install package] *********************************************************************************************
ok: [server1.lab.example.com] => (item={u'name': u'chrony'})
ok: [server2.lab.example.com] => (item={u'name': u'chrony'})
ok: [ansible.lab.example.com] => (item={u'name': u'chrony'})
ok: [server3.lab.example.com] => (item={u'name': u'chrony'})
ok: [server1.lab.example.com] => (item={u'name': u'bash-completion'})
ok: [ansible.lab.example.com] => (item={u'name': u'bash-completion'})
ok: [server2.lab.example.com] => (item={u'name': u'bash-completion'})
ok: [server3.lab.example.com] => (item={u'name': u'bash-completion'})
ok: [server1.lab.example.com] => (item={u'name': u'yum-utils'})
ok: [server2.lab.example.com] => (item={u'name': u'yum-utils'})
ok: [ansible.lab.example.com] => (item={u'name': u'yum-utils'})
ok: [server3.lab.example.com] => (item={u'name': u'yum-utils'})
ok: [server1.lab.example.com] => (item={u'name': u'bind-utils'})
ok: [server2.lab.example.com] => (item={u'name': u'bind-utils'})
ok: [ansible.lab.example.com] => (item={u'name': u'bind-utils'})
ok: [server3.lab.example.com] => (item={u'name': u'bind-utils'})
ok: [server2.lab.example.com] => (item={u'name': u'net-tools'})
ok: [server1.lab.example.com] => (item={u'name': u'net-tools'})
ok: [ansible.lab.example.com] => (item={u'name': u'net-tools'})
ok: [server3.lab.example.com] => (item={u'name': u'net-tools'})
ok: [server1.lab.example.com] => (item={u'name': u'ntp'})
ok: [server2.lab.example.com] => (item={u'name': u'ntp'})
ok: [ansible.lab.example.com] => (item={u'name': u'ntp'})
ok: [ansible.lab.example.com] => (item={u'name': u'firewalld'})
ok: [server3.lab.example.com] => (item={u'name': u'ntp'})
ok: [server1.lab.example.com] => (item={u'name': u'firewalld'})
ok: [server2.lab.example.com] => (item={u'name': u'firewalld'})
ok: [ansible.lab.example.com] => (item={u'name': u'wget'})
ok: [server3.lab.example.com] => (item={u'name': u'firewalld'})
ok: [server1.lab.example.com] => (item={u'name': u'wget'})
ok: [server2.lab.example.com] => (item={u'name': u'wget'})
ok: [ansible.lab.example.com] => (item={u'name': u'curl'})
ok: [server1.lab.example.com] => (item={u'name': u'curl'})
ok: [server3.lab.example.com] => (item={u'name': u'wget'})
ok: [ansible.lab.example.com] => (item={u'name': u'unzip'})
ok: [server2.lab.example.com] => (item={u'name': u'curl'})
ok: [server1.lab.example.com] => (item={u'name': u'unzip'})
ok: [server3.lab.example.com] => (item={u'name': u'curl'})
ok: [server2.lab.example.com] => (item={u'name': u'unzip'})
ok: [server3.lab.example.com] => (item={u'name': u'unzip'})

TASK [stop the services] *******************************************************************************************
ok: [ansible.lab.example.com] => (item={u'name': u'firewalld'})
ok: [server2.lab.example.com] => (item={u'name': u'firewalld'})
ok: [server3.lab.example.com] => (item={u'name': u'firewalld'})
ok: [server1.lab.example.com] => (item={u'name': u'firewalld'})

TASK [start and enable services] ***********************************************************************************
changed: [ansible.lab.example.com] => (item={u'name': u'chronyd'})
changed: [ansible.lab.example.com] => (item={u'name': u'ntpd'})
changed: [server2.lab.example.com] => (item={u'name': u'chronyd'})
changed: [server3.lab.example.com] => (item={u'name': u'chronyd'})
changed: [server1.lab.example.com] => (item={u'name': u'chronyd'})
changed: [server1.lab.example.com] => (item={u'name': u'ntpd'})
changed: [server3.lab.example.com] => (item={u'name': u'ntpd'})
changed: [server2.lab.example.com] => (item={u'name': u'ntpd'})

TASK [copy configuration files from the URLs] **********************************************************************
ok: [ansible.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/hosts', u'dest': u'/etc/hosts', u'name': u'hosts'})
ok: [ansible.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/nsswitch.conf', u'dest': u'/etc/nsswitch.conf', u'name': u'nsswitch.conf'})
ok: [ansible.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/profile', u'dest': u'/etc/profile', u'name': u'profile'})
ok: [server3.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/hosts', u'dest': u'/etc/hosts', u'name': u'hosts'})
ok: [server1.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/hosts', u'dest': u'/etc/hosts', u'name': u'hosts'})
ok: [server2.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/hosts', u'dest': u'/etc/hosts', u'name': u'hosts'})
ok: [ansible.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/resolv.conf', u'dest': u'/etc/resolv.conf', u'name': u'resolv.conf'})
ok: [ansible.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/selinuxconfig', u'dest': u'/etc/selinux/config', u'name': u'selinuxconfig'})
ok: [ansible.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/yum.conf', u'dest': u'/etc/yum.conf', u'name': u'yum.conf'})
ok: [server1.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/nsswitch.conf', u'dest': u'/etc/nsswitch.conf', u'name': u'nsswitch.conf'})
ok: [server3.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/nsswitch.conf', u'dest': u'/etc/nsswitch.conf', u'name': u'nsswitch.conf'})
ok: [server2.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/nsswitch.conf', u'dest': u'/etc/nsswitch.conf', u'name': u'nsswitch.conf'})
changed: [server3.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/profile', u'dest': u'/etc/profile', u'name': u'profile'})
changed: [server2.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/profile', u'dest': u'/etc/profile', u'name': u'profile'})
changed: [server1.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/profile', u'dest': u'/etc/profile', u'name': u'profile'})
ok: [server3.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/resolv.conf', u'dest': u'/etc/resolv.conf', u'name': u'resolv.conf'})
ok: [server1.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/resolv.conf', u'dest': u'/etc/resolv.conf', u'name': u'resolv.conf'})
ok: [server2.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/resolv.conf', u'dest': u'/etc/resolv.conf', u'name': u'resolv.conf'})
ok: [server1.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/selinuxconfig', u'dest': u'/etc/selinux/config', u'name': u'selinuxconfig'})
ok: [server3.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/selinuxconfig', u'dest': u'/etc/selinux/config', u'name': u'selinuxconfig'})
ok: [server2.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/selinuxconfig', u'dest': u'/etc/selinux/config', u'name': u'selinuxconfig'})
ok: [server1.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/yum.conf', u'dest': u'/etc/yum.conf', u'name': u'yum.conf'})
ok: [server2.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/yum.conf', u'dest': u'/etc/yum.conf', u'name': u'yum.conf'})
ok: [server3.lab.example.com] => (item={u'url': u'http://ansible.lab.example.com/config/yum.conf', u'dest': u'/etc/yum.conf', u'name': u'yum.conf'})

PLAY RECAP *********************************************************************************************************
ansible.lab.example.com    : ok=5    changed=1    unreachable=0    failed=0
server1.lab.example.com    : ok=5    changed=2    unreachable=0    failed=0
server2.lab.example.com    : ok=5    changed=2    unreachable=0    failed=0
server3.lab.example.com    : ok=5    changed=2    unreachable=0    failed=0

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