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serv-01-baselinux/tasks/addtoobservium.yml

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+---
+- name: Extract SNMP community string from snmpd.conf using shell
+#  become: true
+  shell: |
+    awk '/^com2sec\s+readonly/ {print $4}' /etc/snmp/snmpd.conf | head -1
+  register: snmp_comm_out
+  changed_when: false
+
+- name: Set fact with SNMP community
+  set_fact:
+    snmp_community: "{{ snmp_comm_out.stdout | trim }}"
+
+- name: Debug found community
+  debug:
+    msg: "SNMP community: {{ snmp_community }}"
+
+# 2️⃣ Check if this host is already in Observium — runs on the Observium server
+- name: Check if host is already in Observium database
+  become: false
+  delegate_to: "{{ observium_server }}"
+  shell: |
+    docker exec {{ observium_container }} bash -c '
+      MYHOST={{ inventory_hostname }};
+      echo "SELECT device_id FROM devices WHERE hostname = '\''$MYHOST'\'';" | \
+      mysql -u"$OBSERVIUM_DB_USER" -p"$OBSERVIUM_DB_PASS" \
+        -h "$OBSERVIUM_DB_HOST" "$OBSERVIUM_DB_NAME"
+    '
+  register: observium_check
+  changed_when: false
+
+- name: Determine if host is already present in Observium
+  set_fact:
+    observium_device_id: >-
+      {{
+        observium_check.stdout_lines
+        | select('match', '^[0-9]+')
+        | list
+        | first
+        | default('')
+      }}
+
+- name: Show if host is already present
+  debug:
+    msg: "✅ Host {{ inventory_hostname }} is already in Observium (Device ID: {{ observium_device_id }})"
+  when: observium_device_id != ""
+
+# 3️⃣ Add the host to Observium if it does not exist
+- name: Add host to Observium
+  become: false
+  delegate_to: "{{ observium_server }}"
+  shell: |
+    docker exec {{ observium_container }} bash -c './add_device.php {{ inventory_hostname }} {{ snmp_community }} v2c'
+  register: add_result
+  when: observium_device_id == ""
+
+- name: Check if add_device.php output shows success
+  set_fact:
+    observium_add_success: "{{ add_result.stdout is search('Added device') }}"
+  when: observium_device_id == ""
+
+- name: Show result of Observium addition
+  debug:
+    msg: >-
+      {% if observium_add_success %}
+        ✅ Host {{ inventory_hostname }} was successfully added to Observium.
+      {% else %}
+        ⚠️ Host {{ inventory_hostname }} was NOT added to Observium. Check manually!
+      {% endif %}
+  when: observium_device_id == ""