add ondemand_exporter

roles/openondemand-webnode-config/defaults/main.yml

@@ -1,2 +1,4 @@
 apache_server_limit: 8
 apache_threads_per_child: 32
+ondemand_exporter_version: 0.10.0
+ondemand_exporter_checksum: e56b0c14e2829141f94f44f35ca8577e7623305d83d7c082fb66bba945e0f321

roles/openondemand-webnode-config/files/ondemand_exporter.service

@@ -0,0 +1,18 @@
+[Unit]
+Description=OnDemand Prometheus Exporter
+Wants=basic.target
+After=basic.target network.target
+
+[Service]
+User=ondemand_exporter
+Group=ondemand_exporter
+SyslogIdentifier=ondemand_exporter
+Environment="LISTEN_ADDRESS=:9301"
+Environment="APACHE_STATUS_URL=http://localhost:81/server-status"
+ExecStart=/usr/local/bin/ondemand_exporter
+ExecReload=/bin/kill -HUP $MAINPID
+KillMode=process
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

roles/openondemand-webnode-config/files/ondemand_exporter_apache.conf

@@ -0,0 +1,22 @@
+ExtendedStatus On
+
+Listen 81
+<VirtualHost *:81>
+  ServerName localhost
+
+  <Location /server-status>
+      SetHandler server-status
+      Require ip 127.0.0.1 ::1
+  </Location>
+
+  <Location "/">
+    <RequireAny>
+      Require ip 127.0.0.1 ::1
+    </RequireAny>
+  </Location>
+
+  ## Logging
+  ErrorLog logs/ondemand_exporter_error.log
+  ServerSignature Off
+  CustomLog logs/ondemand_exporter_access.log combined
+</VirtualHost>

roles/openondemand-webnode-config/files/ondemand_exporter_sudo

@@ -0,0 +1,4 @@
+Defaults:ondemand_exporter !syslog
+Defaults:ondemand_exporter !requiretty
+ondemand_exporter ALL=(ALL) NOPASSWD:/opt/ood/nginx_stage/sbin/nginx_stage nginx_list
+ondemand_exporter ALL=(ALL) NOPASSWD:/usr/sbin/ondemand-passenger-status

roles/openondemand-webnode-config/handlers/main.yml

@@ -0,0 +1,9 @@
+---
+- name: Restart httpd
+  systemd:
+    name: apache2
+    state: restarted
+
+- name: Reload systemd
+  systemd:
+    daemon_reload: true

roles/openondemand-webnode-config/tasks/main.yml

@@ -100,3 +100,83 @@
     owner: root
     group: root
     mode: '0755'
+
+- name: Create ondemand_exporter group
+  ansible.builtin.group:
+    name: ondemand_exporter
+    state: present
+    system: true
+
+- name: Create ondemand_exporter user
+  ansible.builtin.user:
+    name: ondemand_exporter
+    group: ondemand_exporter
+    shell: /sbin/nologin
+    home: /var/lib/ondemand_exporter
+    system: true
+    create_home: false
+
+- name: Download ondemand_exporter binary
+  ansible.builtin.get_url:
+    url: "https://github.com/OSC/ondemand_exporter/releases/download/v{{ ondemand_exporter_version }}/ondemand_exporter-{{ ondemand_exporter_version }}.linux-amd64.tar.gz"
+    dest: "/tmp/ondemand_exporter-{{ ondemand_exporter_version }}.tar.gz"
+    checksum: "{{ ondemand_exporter_checksum }}"
+
+- name: Extract ondemand_exporter binary
+  ansible.builtin.unarchive:
+    src: "/tmp/ondemand_exporter-{{ ondemand_exporter_version }}.tar.gz"
+    dest: /tmp
+    extra_opts:
+      - --strip-components
+      - 1
+    remote_src: true
+    creates: /tmp/ondemand_exporter
+
+- name: Install ondemand_exporter binary
+  ansible.builtin.copy:
+    src: /tmp/ondemand_exporter
+    dest: /usr/local/bin/ondemand_exporter
+    remote_src: true
+    owner: root
+    group: root
+    mode: 0755
+
+- name: Install ondemand_exporter sudo rule
+  ansible.builtin.copy:
+    src: ondemand_exporter_sudo
+    dest: /etc/sudoers.d/ondemand_exporter
+    mode: 0440
+
+- name: Install Apache config for ondemand_exporter
+  ansible.builtin.copy:
+    src: ondemand_exporter_apache.conf
+    dest: /etc/apache2/mods-available/status.conf
+  notify: Restart httpd
+
+- name: Enable apache mod_status module
+  ansible.builtin.command:
+    cmd: a2enmod status.load
+    creates: /etc/apache2/mods-enabled/status.load
+  notify: Restart httpd
+
+- name: Enable apache ondemand_exporter conf
+  ansible.builtin.command:
+    cmd: a2enmod status.conf
+    creates: /etc/apache2/mods-enabled/status.conf
+  notify: Restart httpd
+
+- name: Install ondemand_exporter systemd unit file
+  ansible.builtin.copy:
+    src: ondemand_exporter.service
+    dest: /etc/systemd/system/ondemand_exporter.service
+  notify:
+    - Reload systemd
+
+- name: Flush handlers
+  meta: flush_handlers
+
+- name: Start ondemand_exporter service
+  ansible.builtin.systemd:
+    name: ondemand_exporter
+    state: started
+    enabled: true