configure prod MongoDB replicate set

Signed-off-by: Jakub Sokołowski <jakub@status.im>

ansible/dev.yml

@@ -1,6 +1,6 @@
 ---
-- name: Configure MongoDB
+- name: Configure MongoDB dev cluster
-  hosts: mongodb
+  hosts: db.dev
   roles:
     - mongodb-firewall
     - mongodb-setup

ansible/group_vars/db.prod.yml

@@ -1,6 +1,7 @@
 ---
 # versions
 mongodb_version: "4.0"
+# Fixes: https://github.com/ansible/ansible/issues/44970
 mongodb_pymongo_pip_version: 3.8.0
 
 # listening address & port
@@ -33,11 +34,15 @@ mongodb_oplog_users:
 mongodb_login_host_vars: '{{ hostvars[groups["db.prod"][0]] }}'
 mongodb_login_host: '{{ mongodb_login_host_vars["dns_entry"] }}'
 
-# TODO generate this dynamically
 mongodb_replication_params:
+  - host_name: '{{ hostvars[groups["db.prod"][0]].dns_entry }}'
   - host_name: '{{ hostvars[groups["db.prod"][1]].dns_entry }}'
   - host_name: '{{ hostvars[groups["db.prod"][2]].dns_entry }}'
 
+# avoid having to auth on localhost
+mongodb_set_parameters:
+  enableLocalhostAuthBypass: "true"
+
 # backups auth
 mongodb_backup_db_name: '{{ mongodb_users[0].database }}'
 mongodb_backup_db_user: '{{ mongodb_users[0].name }}'

ansible/host_vars/node-01.us-east-1a.db.prod

@@ -0,0 +1,4 @@
+---
+# use this variable for replica set init only
+# or when master is moved from initial master node
+mongodb_master: true

ansible/prod.yml

@@ -0,0 +1,11 @@
+---
+- name: Configure MongoDB prod cluster
+  hosts: db.prod
+  roles:
+    - mongodb-firewall
+    - mongodb-setup
+    - mongodb-backups
+  post_tasks:
+    - name: MongoDB URI string
+      debug:
+        msg: 'mongodb://{{ mongodb_users[0].name }}:{{ mongodb_users[0].password }}@{{ dns_entry }}:{{ mongodb_net_port }}/{{ mongodb_users[0].database }}'

ansible/requirements.yml

@@ -19,6 +19,8 @@
   src: git@github.com:status-im/infra-role-s3cmd-backup.git
   scm: git
 
+# WARNING: Fails if python3 is the default
+# Details:
 - name: mongodb-setup
   src: https://github.com/UnderGreen/ansible-role-mongodb.git
   scm: git