Question: Network restart stuff

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I know that ssh is smart enough to stay connected (or reconnect), but I am wondering if there is a general rule of thumb to keep in mind when restarting network services via ansible? ie. I am disabling NetworkManager on all systems, enabling the network, and then restarting the network. Any gotchas or anything else to be aware of?

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tasks file for disable_NetworkManager

  • name: Check if NetworkManager is installed
    shell: “rpm -qa | grep -i NetworkManager”
    changed_when: false
    no_log: true
    register: nm_installed
    ignore_errors: true

  • name: Gather list of ifcfg-* files
    shell: ls “{{ net_path }}” | grep ^ifcfg- | grep 0$ | grep -ve ifcfg-lo -e @ # @ excludes ansible backup files
    register: ifcfg_list
    changed_when: false

  • name: Disable NetworkManager control from ifcfg-* files
    lineinfile:
    path: “{{ net_path }}{{ item }}”
    regexp: “^NM_CONTROLLED.*”
    line: ‘NM_CONTROLLED=no’
    state: present
    with_items: “{{ ifcfg_list.stdout_lines }}”

  • fail:
    msg: “NetworkManager is not installed on {{ ansible_hostname }}. Nothing left to do. Stopping here to prevent network restart.”
    when: nm_installed.rc != 0

  • name: Uninstall NetworkManager
    yum:
    name: “{{ item }}”
    state: absent
    with_items: “{{ nm_installed.stdout_lines }}”
    when: nm_installed.rc == 0
    notify: Restart Networking

  • name: Disable NetworkManager and Enable networking services
    service:
    name: “{{item.name}}”
    enabled: “{{item.enabled}}”
    state: “{{item.state}}”
    changed_when: false
    with_items:

  • {name: “NetworkManager”, enabled: “no”, state: “stopped”}

  • {name: “network”, enabled: “yes”, state: “started”}
    ignore_errors: true
    notify: Restart Networking

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