- Fixes user-defined configuration

Author: Alan Christie

README.md

@@ -31,14 +31,9 @@ As well as the 'standard' postgres user you can optionally also create
 a second (auxiliary) user with a database and optional super-user privileges
 using the `pg_aux` parameters (see `roles/postgresql/defaults/main.yaml`).
 
-## Fine-tuning postgres with an extra configuration file
-You can configure any additional database [parameters] using a postgres
-configuration file. An example is present in the root of this project
-(`postgres-extra.conf`).
-
-If you need a file, prepare it and then name it using the playbook's
-`pg_extra_configuration_file` parameter, which will be injected into the
-postgres **Pod** as a **ConfigMap** and processed by postgres as it starts.
+## Fine-tuning postgres with configuration
+You can configure any additional database [parameters] using the playbook
+variable `pg_configuration`.
 
 ---
 

parameters-template.yaml

@@ -23,3 +23,7 @@ pg_copy_vol_storageclass: efs
 pg_aux_user: frag
 pg_aux_user_password: blob1234
 pg_aux_database: frag
+
+pg_configuration: |
+  listen_addresses = '*'
+  shared_buffers = 512MB

postgres-extra.conf

@@ -53,6 +53,22 @@ pg_aux_user_is_superuser: yes
 # What is placed here is written to the container as '/tmp/postgresql.conf',
 # which is then copied to 'PGDATA/postgresql.conf' at run-time
 # by our initialisation script '01-init.sh'.
+#
+# The pg_configuration can be used to set any postgres configuration
+# parameter: -
+#
+#   pg_configuration: |
+#     listen_addresses = '*'
+#     autovacuum_max_workers = 2
+#     logging_collector = true
+#     log_min_messages = notice
+#     max_worker_processes = 2
+#     max_parallel_workers = 2
+#     max_parallel_workers_per_gather = 2
+#     max_wal_size = 1GB
+#     shared_buffers = 128kB
+#     synchronous_commit = off
+#     work_mem = 4MB
 pg_configuration: |
   listen_addresses = '*'
 

roles/postgresql/defaults/main.yaml

@@ -10,7 +10,7 @@ data:
     set -e
 
     # Copy configuration into place
-    cat /tmp/postgresql.conf > /var/lib/postgresql/data/postgresql.conf
+    cat /tmp/postgresql.conf > $PGDATA/postgresql.conf
 
 {% if pg_aux_user_fact %}
     # Configure aux user