Added a script to backup linux container to google cloud store

proxmox/backup_gitea_gce.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+
+import os
+import re
+import subprocess
+import tempfile
+
+# Using SSH from another machine, tell proxmox to create a snapshot of the
+# gitea container, copy that snapshot to this machine, upload it to the
+# google cloud storage archival bucket, and then delete the backup from
+# proxmox. Why delete? Because I am a schmuck and have a too small SSD on
+# my proxmox box to store many backups.
+#
+# We are only adding files to the bucket, and you will have to manually
+# in the future go in and delete older backups.
+
+# The VMID (in terms of proxmox) for the Gitea container
+GITEA_VMID=104
+
+# IP address of our proxmox container
+PROXMOX_IP="10.0.1.200"
+
+# Google cloud bucket we are storing our backup into.
+GCE_BUCKET="gs://c9ad486f2e268b556ce305c1231b4e2d"
+
+# We are backing the container image to Google Cloud Platform, specifically
+# a cloud storage bucket with a storage class of Archive. Pricing is as of
+# writing this guide, assuming 5 GB per snapshot.
+#
+# Assuming ~5 GB per Snapshot;
+# Storage (Archive Class): $0.0012/GB/Month => $0.006/Month
+# Storage (Archive + Minimum Duration): 12 Months * $0.006 => $0.72
+# Network Egress: $0.12/GB => $0.60
+# Retrival: $0.05/GB => $0.25
+
+# First we tell proxmox to create a backup using snapshot mode of our
+# gitea container, compressing it with zstd.
+ps = subprocess.run(\
+	f'ssh root@{PROXMOX_IP} vzdump {GITEA_VMID} --mode snapshot --compress zstd --zstd 0 --dumpdir /tmp', \
+	shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, check=True, text=True)
+
+# Extract the path to the generated backup image.
+backup_filepath = re.findall("creating vzdump archive \'(.*)\'", ps.stdout)[0]
+
+# Send it to us so we can upload it locally without having to play around with credential handling
+# for gsutil.
+with tempfile.TemporaryDirectory() as local_tmpdir:
+	print(f'Using {local_tmpdir} as temporary directory to store local copy of {backup_filepath} from proxmox...')
+
+	# Copy it to this machine.
+	subprocess.call(f'rsync -avP root@{PROXMOX_IP}:\'{backup_filepath}\' {local_tmpdir}/', shell=True)
+
+	# And upload it to our bucket.
+	subprocess.call(f'gsutil cp {local_tmpdir}/* {GCE_BUCKET}', shell=True)