remove old backups only after testing new ones, improve bootstrap

howto/postgresql.md

@@ -2146,16 +2146,48 @@ This will eventually become the default, but for now that needs to be
 added by hand, either in `hiera/roles/$ROLE.yaml` or
 `hiera/nodes/$FQDN.yaml` if the node does not have a role.
 
+The configuration of the new backup can be tested with this command on
+the client:
+
+    sudo -u postgres pgbackrest --stanza=`hostname -f` check
+
+For example, this was done to test `weather-01`:
+
+    root@weather-01:~# sudo -u postgres pgbackrest --stanza=weather-01.torproject.org check
+
 Then Puppet needs to run on the "client" (the PostgreSQL server) and
 on the "repository" (the backup server, currently
 `backup-storage-01`). The full backups will run in the coming week,
-but can be ran manually with:
+but can be ran manually on the repository server with:
 
     systemctl start pgbackrest-backup-full@$HOSTNAME.service
 
 For example:
 
-    systemctl start pgbackrest-backup-full@materculae.service
+    root@backup-storage-01:~# systemctl start pgbackrest-backup-full@materculae.service
+
+You should be able to see information about that backup with the
+`info` command on the client:
+
+    sudo -u postgres pgbackrest --stanza=`hostname -f` info
+
+For example:
+
+```
+root@weather-01:~# sudo -u postgres pgbackrest --stanza=`hostname -f` info
+stanza: weather-01.torproject.org
+    status: ok
+    cipher: none
+
+    db (current)
+        wal archive min/max (15): 000000010000001F00000004/00000001000000210000002F
+
+        full backup: 20241118-202245F
+            timestamp start/stop: 2024-11-18 20:22:45 / 2024-11-18 20:28:43
+            wal start/stop: 000000010000001F00000009 / 000000010000001F00000009
+            database size: 40.3MB, database backup size: 40.3MB
+            repo1: backup set size: 7.6MB, backup size: 7.6MB
+```
 
 Finally, the old backup directory needs to be moved out to avoid
 warnings on the old storage server (currently `bungei`):
@@ -2170,15 +2202,6 @@ The old backups should be scheduled for removal with:
 
     echo rm -r /srv/backups/pg/$HOSTNAME.old | at now + 30 days
 
-The configuration of the new backup can be tested with this command on
-the client:
-
-    sudo -u postgres pgbackrest --stanza=$FQDN check
-
-For example, this was done to test `weather-01`:
-
-    root@weather-01:~# sudo -u postgres pgbackrest --stanza=weather-01.torproject.org check
-
 ### Manual configuration
 
 Those instructions are kept for historical reference, and are all