library/roles/postgresql: Fix the pgpool recovery scripts to be compatible with pgpool 2.5.

postgresql/tasks/postgres_pgpool.yml

@@ -39,7 +39,7 @@
   tags: [ 'postgresql', 'postgres', 'pgpool' ]
 
 - name: Install the pgpool recovery and remote restart scripts. They assume that the postgresql hosts can talk to each other
-  template: src={{ item.1 }}.j2 dest={{ item.0.backend_data_directory }}/{{ item.1 }} owner=postgres group=postgres mode=0500
+  template: src={{ item.1 }}.j2 dest={{ item.0.backend_data_directory }}/main/{{ item.1 }} owner=postgres group=postgres mode=0500
   with_nested: 
     - '{{ pgpool_backends | default([]) }}'
     - [ '{{ pgpool_recovery_stage1_script }}', '{{ pgpool_recovery_stage2_script }}', '{{ pgpool_remote_start_script }}' ]

postgresql/templates/pgpool_recovery_stage_1.j2

@@ -4,13 +4,16 @@
 #
 TS=$(date +%Y-%m-%d_%H-%M-%S)
 MASTER_HOST=$(hostname -f)
-# The variables $1 and $3 are {{ psql_data_dir }}/main
+# $1 is {{ psql_data_dir }}/main while  $3 is {{ psql_data_dir }}
 MASTER_DATA=$1
 MASTER_DATA_BASE_DIR={{ psql_data_dir }}
-RECOVERY_TARGET=$2
-RECOVERY_DATA=$3
+RECOVERY_TARGET=${2}
+RECOVERY_DATA=${3}/main
 RECOVERY_DATA_BASE_DIR={{ psql_data_dir }}
 
+logger "pgpool_recovery_1: MASTER_DATA=$MASTER_DATA"
+logger "pgpool_recovery_1: RECOVERY_DATA=$RECOVERY_DATA"
+
 archive_dir={{ psql_wal_archiving_log_dir }}
 
 # Ensure that postgres is shut down on the target node

postgresql/templates/pgpool_recovery_stage_2.j2

@@ -2,14 +2,19 @@
 # Online recovery 2nd stage script
 #
 MASTER_DATA_BASE_DIR={{ psql_data_dir }}
-MASTER_DATA=$1
-RECOVERY_TARGET=$2
+MASTER_DATA=${1}
+RECOVERY_TARGET=${2}
 RECOVERY_DATA_BASE_DIR={{ psql_data_dir }}
-RECOVERY_DATA=$3
+RECOVERY_DATA=${3}
 port={{ psql_db_port }}        # PostgreSQL port number
 
 archive_dir={{ psql_wal_archiving_log_dir }}
 
+logger "pgpool_recovery_2: MASTER_DATA=$MASTER_DATA"
+logger "pgpool_recovery_2: RECOVERY_DATA=$RECOVERY_DATA"
+logger "pgpool_recovery_2: archive_dir=$archive_dir"
+
+
 # Force to flush current value of sequences to xlog
 psql -p $port -t -c 'SELECT datname FROM pg_database WHERE NOT datistemplate AND datallowconn' template1|
 while read i