Update notes on postgres.

docs/PODMAN.md

@@ -16,3 +16,5 @@ Example using [alvistack/ansible-role-podman](https://github.com/alvistack/ansib
         cmd: "loginctl enable-linger {{ sysadmin_username }}"
         creates: "/var/lib/systemd/linger/{{ sysadmin_username }}"
 ```
+
+Depending on the OS version you're using, you may have to account for the usage of deprecated apt-key functionality.

docs/POSTGRES.md

@@ -1,6 +1,6 @@
 # PostgreSQL
 
-This variation of the [original role](https://github.com/Tronde/ansible_role_deploy_wikijs_with_mariadb_pod) is intended to be composed with another role that sets up the database. Here is an example using [anxs.postgresql](https://github.com/ANXS/postgresql)
+Here is an example using [anxs.postgresql](https://github.com/ANXS/postgresql)
 
 ## Example Playbook
 
@@ -23,3 +23,36 @@ postgresql_databases:
     owner: wikijs
     state: present
 ```
+
+Depending on the OS version you're using, you may have to account for the usage of deprecated apt-key functionality.
+
+## PG 15
+
+I'm temporarily using this branch to get PG15:
+
+```yaml
+  - src: https://github.com/ANXS/postgresql
+    name: anxs.postgresql
+    version: development
+```
+## Backups
+
+```bash
+BACKUP_PG_DB() {
+    BACKUP_DIR=$HOME/archive/${TARGET}/postgresql
+    DUMP_FILE=/var/lib/postgresql/${1}_${TIMESTAMP}.dump.bz2
+    ssh root@${TARGET} "cd /var/lib/postgresql && doas -u postgres /usr/bin/pg_dump -Fc ${1} | /usr/bin/bzip2 > ${DUMP_FILE}"
+    mkdir -p ${BACKUP_DIR}
+    rsync -tav root@${TARGET}:${DUMP_FILE} ${BACKUP_DIR}/
+    ssh root@${TARGET} rm -v ${DUMP_FILE}
+
+    # Only remove older backups if newer backups exist
+    NEWER_BACKUPS=$(find $BACKUP_DIR -mtime -60 -type f -name "${1}_*.dump.bz2")
+    if [[ -n $NEWER_BACKUPS ]]; then
+        find $BACKUP_DIR -mtime +60 -type f -name "${1}_*.dump.bz2" -delete
+    else
+        echo "No newer backups found. Old backups not pruned."
+    fi
+}
+BACKUP_PG_DB wikijs
+```