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--- lab:ansible_virtualbox_autoboot_linux:test_the_first_ubuntu_vm_on_ansible [2024/01/19 02:41] – [Confirm the Server is Up] user
+++ lab:ansible_virtualbox_autoboot_linux:test_the_first_ubuntu_vm_on_ansible [2024/05/10 05:17] (current) – removed user
@@ Line 1: / Line 1: @@
-====== Test the First Ubuntu VM on Ansible ======
-In this step we will test the basic connectivity to our new server.
-===== Test SSH Access =====
-  - Log in to your host machine and become the user ''ansible''
-    * Option 1 - ssh to your host machine as the user ''ansible''
-    * Option 2 - log in as usual and run ''su - ansible''
-  - SSH to the IP address of the new server
-    * ''ssh <ip_address>''
-      * The IP address is displayed on the VM's console screen when it starts up
-      * Another option is to look at your router's DHCP clients list
-      * Yet another another option is nmap
-  - The login succeeds without entering a password (you do need accept the fingerprint to add to the list of known hosts)
-    * Will use the user ''ansible'' to manage the server
-===== Test Ansible to the New Server =====
-==== Create the Inventory File ====
-hosts
-==== Confirm the Server is Up ====
-anisble -i hosts ping
-Under [nodes] add the IP address
-Run some test Ansible ad hoc commands
-<code bash>
-ansible -i hosts all --list-hosts
-ansible -i hosts all -m ping
-ansible -i hosts servers -m ping
-ansible -i hosts servers -a "sudo /sbin/reboot"
-</code>
-==== Update Ubuntu ====
-<file yaml update_servers.yml>
----
-- hosts: nodes
-  become: true
-  become_user: root
-  tasks:
-    - name: Update apt repo and cache on all Debian/Ubuntu boxes
-      apt: update_cache=yes force_apt_get=yes cache_valid_time=3600
-    - name: Upgrade all packages on servers
-      apt: upgrade=dist force_apt_get=yes
-    - name: Check if a reboot is needed on all servers
-      register: reboot_required_file
-      stat: path=/var/run/reboot-required get_md5=no
-    - name: Reboot the box if kernel updated
-      reboot:
-        msg: "Reboot initiated by Ansible for kernel updates"
-        connect_timeout: 5
-        reboot_timeout: 300
-        pre_reboot_delay: 0
-        post_reboot_delay: 30
-        test_command: uptime
-      when: reboot_required_file.stat.exists
-</file>
-''ansible-playbook -i hosts update_servers.yml''
-==== Disable DNS Stub Resolver ====
-Even though each node receives its DNS information via DHCP, Ubuntu 22.04 will at times fail to resolve names. Rebooting solves the problem temporarily, but it will come back.
-<file yaml disable_dns_stub.yml>
----
-- name: Disable DNS stub listener
-  hosts: nodes
-  remote_user: ansible
-  become: true
-  tasks:
-    - name: Disable DNS stub listener
-      ini_file: dest=/etc/systemd/resolved.conf section=Resolve option=DNSStubListener value=no backup=yes
-      tags: configuration
-    - name: Restart NetworkManager
-      systemd:
-        name: NetworkManager
-        state: restarted
-    - name: Restart systemd-resolved
-      systemd:
-        name: systemd-resolved
-        state: restarted
-    - name: daemon-reload
-      systemd:
-        daemon_reload: true
-</file>
-ansible-playbook -i hosts disable-dns-stub.yml