linuxexpert-practice-labs/labs/ex294/4-1-ansible-playbook-and-navigator/setup.sh

# The control node: ansible-core, python3-pip (for ansible-navigator's
# virtual environment) and greg with a key and quiet rootless podman.
for p in ansible-core python3-pip; do
	pkg_installed $p || { echo $p >>"$LAB_STATE/missing"; pkg_install $p; }
done
user_add greg
install -d -m 700 -o greg -g greg /home/greg/.ssh
runuser -u greg -- ssh-keygen -q -t ed25519 -N '' -f /home/greg/.ssh/id_ed25519
# Without a systemd user session (su, sudo -i), podman would warn on every
# run; the cgroupfs manager works the same in any login.
install -d -m 755 -o greg -g greg /home/greg/.config /home/greg/.config/containers
printf '[engine]\ncgroup_manager = "cgroupfs"\nevents_logger = "file"\n' >/home/greg/.config/containers/containers.conf
chown greg: /home/greg/.config/containers/containers.conf

# greg's project: ansible.cfg, inventory, ansible-navigator.yml without a
# mode, and site.yml, which records each run on the node (task 1).
install -d -m 755 -o greg -g greg /home/greg/ansible
cat >/home/greg/ansible/ansible.cfg <<'X'
[defaults]
inventory = ./inventory
remote_user = devops
host_key_checking = false

[privilege_escalation]
become = true
X
printf '[nodes]\nnode1\nnode2\n' >/home/greg/ansible/inventory
cat >/home/greg/ansible/ansible-navigator.yml <<'X'
---
ansible-navigator:
  execution-environment:
    image: localhost/lab-ee:2.16
    pull:
      policy: never
  playbook-artifact:
    enable: false
X
cat >/home/greg/ansible/site.yml <<'X'
---
- name: Check the managed nodes
  hosts: all
  vars:
    run_by: "{{ 'ansible-navigator' if lookup('ansible.builtin.env', 'ANSIBLE_STDOUT_CALLBACK') == 'awx_display' else 'ansible-playbook' }}"
    run_in: "{{ 'an execution environment' if lookup('ansible.builtin.env', 'container') else 'the control node' }}"
  tasks:
    - name: Make sure the node answers
      ansible.builtin.ping:

    - name: Record this run in /var/log/lab-runs.log
      ansible.builtin.lineinfile:
        path: /var/log/lab-runs.log
        line: "{{ now(utc=true, fmt='%Y-%m-%d %H:%M:%S') }} {{ run_by }} in {{ run_in }}, limit {{ ansible_limit | default('none') }}"
        create: true
        mode: "0644"
      changed_when: false
X
chown greg: /home/greg/ansible/*

# The note for task 3, outside the project.
N=$(od -An -N6 -tx1 /dev/urandom | tr -d ' \n')
state_set note "$N"
printf 'The note says: %s\n' "$N" >/tmp/lab-note.txt
chown greg: /tmp/lab-note.txt

# The managed nodes, with devops: greg's key and passwordless sudo.
nodes_up 2
for n in $(nodes_names); do
	in_node "$n" 'useradd -m devops && printf "devops ALL=(ALL) NOPASSWD: ALL\n" >/etc/sudoers.d/devops && chmod 440 /etc/sudoers.d/devops && install -d -m 700 -o devops -g devops /home/devops/.ssh'
	in_node -i "$n" 'cat >/home/devops/.ssh/authorized_keys && chown devops: /home/devops/.ssh/authorized_keys && chmod 600 /home/devops/.ssh/authorized_keys' </home/greg/.ssh/id_ed25519.pub
done

# ansible-navigator from PyPI, in its own virtual environment. Only the
# command goes on the PATH, so ansible-playbook stays the RPM's (and
# --ee false runs the control node's ansible-core).
if [ ! -e /usr/local/bin/ansible-navigator ]; then
	say "${C_DIM}Installing ansible-navigator...${C_0}"
	python3 -m venv /opt/le-lab-navigator
	for i in 1 2 3; do
		/opt/le-lab-navigator/bin/pip install -q --disable-pip-version-check 'ansible-navigator==26.10.0' >/dev/null && break
		sleep 5
	done
	ln -s /opt/le-lab-navigator/bin/ansible-navigator /usr/local/bin/ansible-navigator
	/usr/local/bin/ansible-navigator --version >/dev/null
	state_set navigator installed
fi

# The execution environment localhost/lab-ee:2.16: the node image with
# ansible-core and ansible.posix and community.general from Ansible Galaxy.
# Built as root, given to greg's rootless podman, and removed from root's.
say "${C_DIM}Building the execution environment image...${C_0}"
d=$(mktemp -d)
cat >"$d/Containerfile" <<X
FROM $LE_NODE_IMAGE
LABEL ansible-execution-environment=true
RUN dnf -y -q --setopt=install_weak_deps=False install ansible-core \\
    && for i in 1 2 3; do \\
        ansible-galaxy collection install -p /usr/share/ansible/collections \\
            'ansible.posix:>=2,<3' 'community.general:>=11,<12' && break; sleep 5; \\
    done \\
    && ansible-doc community.general.lvg >/dev/null && ansible-doc ansible.posix.seboolean >/dev/null \\
    && dnf clean all
X
podman build -q --layers=false -t localhost/lab-ee:2.16 "$d" >/dev/null
rm -rf "$d"
podman save localhost/lab-ee:2.16 | runuser -l greg -c 'podman load -q' >/dev/null 2>&1
podman rmi localhost/lab-ee:2.16 >/dev/null
runuser -l greg -c 'podman image exists localhost/lab-ee:2.16'