added multica agent hosts

ansible/roles/multica_agent_host/tasks/node.yml

@@ -0,0 +1,93 @@
+---
+# Installed from the official nodejs.org tarball rather than a distro repo so
+# that multica_node_version is a real pin on every distribution.
+
+- name: Node | Check whether the pinned runtime is already present
+  ansible.builtin.stat:
+    path: "{{ multica_install_dir }}/node"
+  register: _multica_node_stat
+  check_mode: false
+
+- name: Node | Read the installed version
+  ansible.builtin.command:
+    argv: ["{{ multica_install_dir }}/node", "--version"]
+  register: _multica_node_installed
+  when: _multica_node_stat.stat.exists
+  changed_when: false
+  failed_when: false
+  check_mode: false
+
+- name: Node | Decide whether an install is needed
+  ansible.builtin.set_fact:
+    _multica_node_needs_install: >-
+      {{ (not _multica_node_stat.stat.exists)
+         or (_multica_node_installed.rc | default(1)) != 0
+         or (_multica_node_installed.stdout | default('') | trim) != ('v' ~ multica_node_version) }}
+
+- name: Node | Install the pinned runtime
+  when: _multica_node_needs_install | bool
+  block:
+    - name: Node | Create the install prefix
+      ansible.builtin.file:
+        path: "{{ multica_node_prefix }}"
+        state: directory
+        owner: root
+        group: root
+        mode: "0755"
+      become: true
+
+    # get_url resolves `sha256:<url>` against the file's basename in SHASUMS256.txt.
+    - name: Node | Download the tarball with checksum verification
+      ansible.builtin.get_url:
+        url: "{{ multica_node_dist_base_url }}/v{{ multica_node_version }}/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}.tar.xz"
+        dest: "/tmp/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}.tar.xz"
+        checksum: "sha256:{{ multica_node_dist_base_url }}/v{{ multica_node_version }}/SHASUMS256.txt"
+        mode: "0644"
+      become: true
+
+    - name: Node | Unpack it
+      ansible.builtin.unarchive:
+        src: "/tmp/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}.tar.xz"
+        dest: "{{ multica_node_prefix }}"
+        remote_src: true
+        owner: root
+        group: root
+        creates: "{{ multica_node_prefix }}/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}/bin/node"
+      become: true
+
+    - name: Node | Remove the downloaded tarball
+      ansible.builtin.file:
+        path: "/tmp/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}.tar.xz"
+        state: absent
+      become: true
+
+# Symlinked into /usr/local/bin, which is on systemd's default PATH — the
+# daemon's autostart unit does not source /etc/profile.d.
+- name: Node | Link node, npm and npx onto the default PATH
+  ansible.builtin.file:
+    src: "{{ multica_node_prefix }}/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}/bin/{{ item }}"
+    dest: "{{ multica_install_dir }}/{{ item }}"
+    state: link
+    force: true
+  become: true
+  loop: [node, npm, npx]
+
+- name: Node | Create the daemon user's npm global prefix
+  ansible.builtin.file:
+    path: "{{ multica_npm_prefix }}"
+    state: directory
+    owner: "{{ multica_user }}"
+    group: "{{ multica_group }}"
+    mode: "0755"
+  become: true
+
+- name: Node | Point the daemon user's npm at that prefix
+  ansible.builtin.lineinfile:
+    path: "{{ multica_user_home }}/.npmrc"
+    regexp: '^prefix='
+    line: "prefix={{ multica_npm_prefix }}"
+    create: true
+    owner: "{{ multica_user }}"
+    group: "{{ multica_group }}"
+    mode: "0644"
+  become: true