From 21f20d7b030b7dbd8e1988fa3d5800d64ae12d77 Mon Sep 17 00:00:00 2001
From: JuliusFreudenberger <julius+git@jfreudenberger.de>
Date: Sun, 20 Feb 2022 19:00:21 +0100
Subject: [PATCH] Initial commit

---
 backup_script.sh | 92 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100755 backup_script.sh

diff --git a/backup_script.sh b/backup_script.sh
new file mode 100755
index 0000000..3cc1748
--- /dev/null
+++ b/backup_script.sh
@@ -0,0 +1,92 @@
+#!/usr/bin/env bash
+
+### CONFIG
+HC_HOST=https://health.jfreudenberger.de
+###
+
+PING_ROUTE=$HC_HOST/ping/$HC_UUID
+HAS_HOOKS=""
+
+checkInput() {
+  for variable in SERVICE BACKUP_PATH HC_UUID RESTIC_REPOSITORY RESTIC_PASSWORD; do
+    if [[ -z ${!variable} ]]; then
+      echo "Variable $variable not given"
+      exit 1
+    fi
+  done
+}
+
+checkForHooks() {
+  test -f "$SERVICE.sh" && HAS_HOOKS=1
+}
+
+loadServiceHooks() {
+  if [ "$HAS_HOOKS" == "1" ]; then
+    echo "Loading hooks for service $SERVICE"
+    source "$SERVICE.sh"
+  fi
+}
+
+# Send a curl to start the backup
+healthStart() {
+  curl -fsS -m 10 --retry 5 -o /dev/null "$PING_ROUTE"/start
+}
+
+# Send a curl to finish the backup
+healthFinish() {
+  curl -fsS -m 10 --retry 5 -o /dev/null "$PING_ROUTE"
+}
+
+# Check for General Error
+checkNoError() {
+  if [ "$1" -ne 0 ]; then
+      curl -fsS -m 10 --retry 5 --data-raw "$2 error" "$PING_ROUTE"/fail
+      printf "\n%s ERROR !!!\n" "$3"
+  else
+      printf "\n%s SUCESSFULL\n" "$3"
+  fi
+}
+
+# Check for Error in Restic backup
+checkResticError() {
+  if [ "$1" -eq 1 ]; then
+      exitPrematurely "restic fatal error" 
+  elif [ "$1" -eq 2 ]; then
+      exitPrematurely "restic remaining files" 
+  else
+      printf "\nRESTIC SUCCESSFULL\n"
+  fi
+}
+
+exitPrematurely() {
+  if [ "$HAS_HOOKS" == "1" ]; then
+    post
+  fi
+  
+  curl -fsS -m 10 --retry 5 --data-raw "$1" "$PING_ROUTE"/fail
+  printf "\n$1 ERROR !!!\n"
+  exit -1
+}
+
+# Backup the service and call healthchecks
+backup() {
+  checkInput
+  healthStart
+  checkForHooks
+
+  if [ "$HAS_HOOKS" == "1" ]; then
+    loadServiceHooks
+    pre
+  fi
+
+  restic backup $BACKUP_PATH
+  checkResticError "$?"
+
+  if [ "$HAS_HOOKS" == "1" ]; then
+    post
+  fi
+
+  healthFinish
+}
+
+backup