Majorly 5 changes

1.  entries are moved to DCS section. This may simplify the DBA's work.
2.  is converted to . Because PG18 is deprecating md5.
3. Sample . Because majority of deployement needs it.
4. Section for creating additional users are removed. Additional users can be created at anytime.
5. Sample  section . Integration of Linux Watchdog is highly encouraged to perform STONITH / fencing when node hangs.

Author: jobinau

docs/solutions/ha-setup-apt.md

@@ -357,31 +357,19 @@ Run the following commands on all nodes. You can do this in parallel:
                   archive_mode: "on"
                   archive_timeout: 600s
                   archive_command: "cp -f %p /home/postgres/archived/%f"
+          pg_hba:
+          - local all all          peer
+          - host replication replicator 127.0.0.1/32 trust
+          - host replication replicator 192.0.0.0/8 scram-sha-256
+          - host all all 0.0.0.0/0 scram-sha-256
+          recovery_conf:
+            restore_command: cp /home/postgres/archived/%f %p
 
       # some desired options for 'initdb'
       initdb: # Note: It needs to be a list (some options need values, others are switches)
           - encoding: UTF8
           - data-checksums
-
-      pg_hba: # Add following lines to pg_hba.conf after running 'initdb'
-          - host replication replicator 127.0.0.1/32 trust
-          - host replication replicator 0.0.0.0/0 md5
-          - host all all 0.0.0.0/0 md5
-          - host all all ::0/0 md5
-
-      # Some additional users which needs to be created after initializing new cluster
-      users:
-          admin:
-              password: qaz123
-              options:
-                  - createrole
-                  - createdb
-          percona:
-              password: qaz123
-              options:
-                  - createrole
-                  - createdb 
-    
+  
     postgresql:
         cluster_name: cluster_1
         listen: 0.0.0.0:5432
@@ -403,6 +391,12 @@ Run the following commands on all nodes. You can do this in parallel:
         basebackup:
             checkpoint: 'fast'
 
+    watchdog:
+      mode: required # Allowed values: off, automatic, required
+      device: /dev/watchdog
+      safety_margin: 5
+
+
     tags:
         nofailover: false
         noloadbalance: false

docs/solutions/ha-setup-yum.md

@@ -366,31 +366,19 @@ Run the following commands on all nodes. You can do this in parallel:
                   archive_mode: "on"
                   archive_timeout: 600s
                   archive_command: "cp -f %p /home/postgres/archived/%f"
+          pg_hba:
+          - local all all          peer
+          - host replication replicator 127.0.0.1/32 trust
+          - host replication replicator 192.0.0.0/8 scram-sha-256
+          - host all all 0.0.0.0/0 scram-sha-256
+          recovery_conf:
+            restore_command: cp /home/postgres/archived/%f %p
 
       # some desired options for 'initdb'
       initdb: # Note: It needs to be a list (some options need values, others are switches)
           - encoding: UTF8
           - data-checksums
-
-      pg_hba: # Add following lines to pg_hba.conf after running 'initdb'
-          - host replication replicator 127.0.0.1/32 trust
-          - host replication replicator 0.0.0.0/0 md5
-          - host all all 0.0.0.0/0 md5
-          - host all all ::0/0 md5
-
-      # Some additional users which needs to be created after initializing new cluster
-      users:
-          admin:
-              password: qaz123
-              options:
-                  - createrole
-                  - createdb
-          percona:
-              password: qaz123
-              options:
-                  - createrole
-                  - createdb 
-    
+  
     postgresql:
         cluster_name: cluster_1
         listen: 0.0.0.0:5432
@@ -412,6 +400,12 @@ Run the following commands on all nodes. You can do this in parallel:
         basebackup:
             checkpoint: 'fast'
 
+    watchdog:
+      mode: required # Allowed values: off, automatic, required
+      device: /dev/watchdog
+      safety_margin: 5
+
+
     tags:
         nofailover: false
         noloadbalance: false