chore: postgresql services file and rds commands

knowledge base/postgresql.md

@@ -38,6 +38,14 @@ postgres.lan:5643:postgres:postgres:BananaORama
 *:*:sales:elaine:modestPassword
 EOF
 chmod '600' ~/'.pgpass'
+
+# Set up the per-user services file.
+cat <<EOF > ~/'.pg_service.conf'
+[prod]
+host = prod.0123456789ab.eu-west-1.rds.amazonaws.com
+port = 5433
+user = master
+EOF
 ```
 
 ```sh
@@ -51,6 +59,7 @@ psql 'my-db' 'user'
 psql 'postgresql://host:5433/my-db?sslmode=require'
 psql -U 'username' -d 'my-db' -h 'hostname' -p 'port' -W
 psql --host 'host.fqnd' --port '5432' --username 'postgres' --database 'postgres' --password
+psql "service=prod sslmode=require"
 
 # List available databases.
 psql … --list

snippets/ansible/tasks.yml

@@ -384,3 +384,10 @@
                 -r --no-role-passwords
               changed_when: false
               register: dump_execution
+        - name: Wait for pending changes to be applied
+          amazon.aws.rds_instance_info:
+            db_instance_identifier: "{{ db_instance_identifier }}"
+          register: instance_check
+          retries: 12
+          delay: 15
+          until: instance_check.instances[0].pending_modified_values.keys() | length > 0

snippets/aws/commands.fish

@@ -79,6 +79,17 @@ echo {1..5} | xargs -p -n '1' -I '{}' aws rds start-export-task …
 
 aws rds describe-export-tasks --query 'ExportTasks[].WarningMessage' --output 'json'
 
+aws rds restore-db-instance-to-point-in-time \
+	--source-db-instance-identifier 'awx' --target-db-instance-identifier 'awx-pitred' \
+	--restore-time '2024-07-31T09:29:40+00:00' \
+	--allocated-storage '20'
+
+aws rds restore-db-instance-from-db-snapshot \
+	--db-instance-identifier 'awx-pitr-snapshot' \
+	--db-snapshot-identifier 'rds:awx-2024-07-30-14-15'
+
+aws rds delete-db-instance --skip-final-snapshot --db-instance-identifier 'awx'
+
 aws s3api list-buckets --output 'text' --query 'Buckets[].Name' | xargs -pn '1' aws s3api list-multipart-uploads --bucket
 
 aws ec2 describe-volumes --output 'text' --filters 'Name=status,Values=available' \