Set custom facts persistently

Create /etc/ansible/facts.d/zerotier.fact on each node containing custom facts in json format. This can then be used to prevent pointless reconfiguration of existing nodes whenever a new one is added to the inventory. In this commit it merely skips the installation tasks.

files/set_facts.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+FACTS_DIR='/etc/ansible/facts.d'
+FACT_FILE="${FACTS_DIR}/zerotier.fact"
+NODE_STATUS=($(zerotier-cli status))
+NETWORKS=$(zerotier-cli listnetworks | tail -n+2)
+
+function file_content {
+    if [ ! -z "$NETWORKS" ]; then
+        echo "{"
+        echo "  \"node_id\":\"${NODE_STATUS[2]}\","
+        echo "  \"networks\": ["
+        while read -r; do
+            network=($REPLY)
+            echo "    {"
+            echo "    \"id\":\"${network[2]}\","
+            echo "    \"status\":\"${network[5]}\""
+            echo "    }"
+        done <<< $NETWORKS
+        echo "  ]"
+        echo "}"
+    else
+        echo "{\"node_id\":\"${NODE_STATUS[2]}\"}"
+    fi
+}
+
+if [ ! -d "$FACTS_DIR" ]; then
+    mkdir -p $FACTS_DIR
+fi
+
+file_content > $FACT_FILE
+
+
+# TO-DO
+# Consider something that hadles JSON better than Bash does
+# The above will fail when it runs in to more than 1 network

tasks/authorize_node.yml

@@ -1,24 +1,8 @@
 ---
-- block:
-  - name: Get Zerotier NodeID
-    shell: zerotier-cli info | awk '{print $3}'
-    register: nodeid
-    changed_when: false
-
-  - name: Set NodeID as fact
-    set_fact:
-      zerotier_node_id: "{{ nodeid.stdout }}"
-
-  when:
-  - zerotier_accesstoken is defined
-  - not ansible_check_mode
-  tags:
-  - configuration
-
 - block:
   - name: Authorize members to network
     uri:
-      url: "{{ zerotier_api_url }}/api/network/{{ zerotier_network_id }}/member/{{ zerotier_node_id }}"
+      url: "{{ zerotier_api_url }}/api/network/{{ zerotier_network_id }}/member/{{ ansible_local.zerotier.node_id }}"
       method: POST
       headers:
         Authorization: bearer {{ zerotier_accesstoken }}
@@ -32,7 +16,7 @@
 
   - name: Configure members in network
     uri:
-      url: "{{ zerotier_api_url }}/api/network/{{ zerotier_network_id }}/member/{{ zerotier_node_id }}"
+      url: "{{ zerotier_api_url }}/api/network/{{ zerotier_network_id }}/member/{{ ansible_local.zerotier.node_id }}"
       method: POST
       headers:
         Authorization: bearer {{ zerotier_accesstoken }}
@@ -46,7 +30,6 @@
     delegate_to: "{{ zerotier_api_delegate }}"
 
   when:
-  - zerotier_accesstoken is defined
   - not ansible_check_mode
   tags:
   - configuration

tasks/main.yml

@@ -3,10 +3,20 @@
 - import_tasks: install.yml
   when:
   - not skip_install|default(false)|bool
+  - ansible_local.zerotier is not defined
+
+- block:
+  - name: Update ansible_local facts
+    script: set_facts.sh
+
+  - name: Re-gather facts
+    setup: ~
+
 
 - import_tasks: authorize_node.yml
   when:
   - zerotier_accesstoken is defined
+  - ansible_local.zerotier.node_id is defined
 
 - import_tasks: join_network.yml
   when: