feat: container backup script

admin/scripts/joj-container-backup

@@ -0,0 +1,77 @@
+#!/bin/bash
+
+DATE=$(date +"%y%m%d")
+
+bck_list() {
+
+	zfs list -t snapshot
+}
+
+bck_update() {
+
+	LIST=($(zfs list -j -t snapshot | jq -rc '[ .datasets | .[] | {dataset: .dataset, version: .snapshot_name} ] | group_by(.dataset) | map({(.[0].dataset): .[-1].version}) | .[]' | tr "\n" " " | sed 's/[{}:"]/ /g'))
+	for((i=0; i < ${#LIST[@]}; i+=2)); do 
+		zfs snapshot ${LIST[i]}@$DATE
+		zfs send -v -i ${LIST[i]}@${LIST[$((i+1))]} ${LIST[i]}@$DATE | ssh grothendieck.nabla.li zfs recv -F backup/${LIST[i]/joj\/}
+	done
+
+}
+
+bck_prune() {
+	
+	LIST=($(zfs list -j -t snapshot | jq -rc '[ .datasets | .[] | {dataset: .dataset, version: .snapshot_name} ] | group_by(.dataset) | map({(.[0].dataset): .[-3].version}) | .[]' | tr "\n" " " | sed 's/[{}:"]/ /g'))
+
+	for((i=0; i < ${#LIST[@]}; i+=2)); do 
+		[ "${LIST[$((i+1))]}" != "null" ] && zfs destroy ${LIST[i]}@%${LIST[$((i+1))]}
+	done
+
+}
+
+bck_init() {
+
+	zfs snapshot joj/$FS
+	zfs send -v joj/$FS | ssh grothendieck.nabla.li zfs recv -F backup/$FS
+
+}
+
+test_net() {
+	
+	if ! ping -c 1 grothendieck.nabla.li; then
+		echo "Error: backup server cannot be reached."
+		exit 20
+	fi
+
+}
+
+case $1 in
+
+	list) 
+		bck_list 
+		;;
+
+	update) 
+		test_net
+		bck_update 
+		;;
+
+	prune) 
+		bck_prune
+		;;
+
+	init) 
+		test_net
+		shift
+		if [ -z "$1" ]; then
+			echo "Error: specificy the course code"
+			exit 10
+		else
+			FS=$1@$DATE
+			bck_init 
+		fi
+		;;
+
+	*) 
+		echo "Usage: $0 [list|init FSname|update|prune]"
+		;;
+
+esac