From 791c61aa9478cdc065f87904adf41f2537df85f5 Mon Sep 17 00:00:00 2001
From: m3tam3re <m@m3tam3re.com>
Date: Wed, 5 Jul 2023 15:05:59 +0200
Subject: [PATCH] backup timer lkk-nix-1

---
 hosts/common/base/default.nix        |  2 +-
 hosts/lkk-nix-1/services/backup.nix  | 86 ++++++++++++++++++++++++++++
 hosts/lkk-nix-1/services/default.nix |  1 +
 3 files changed, 88 insertions(+), 1 deletion(-)
 create mode 100644 hosts/lkk-nix-1/services/backup.nix

diff --git a/hosts/common/base/default.nix b/hosts/common/base/default.nix
index 5fbc563..1cea47c 100644
--- a/hosts/common/base/default.nix
+++ b/hosts/common/base/default.nix
@@ -7,5 +7,5 @@
   users.defaultUserShell = pkgs.fish;
 
   environment.systemPackages =
-    [ inputs.agenix.packages.x86_64-linux.default pkgs.coreutils ];
+    [ inputs.agenix.packages.x86_64-linux.default pkgs.coreutils pkgs.fd ];
 }
diff --git a/hosts/lkk-nix-1/services/backup.nix b/hosts/lkk-nix-1/services/backup.nix
new file mode 100644
index 0000000..dbbd21e
--- /dev/null
+++ b/hosts/lkk-nix-1/services/backup.nix
@@ -0,0 +1,86 @@
+{ pkgs, ... }: {
+
+  systemd = {
+    timers.backup-timer = {
+      wantedBy = [ "timers.target" ];
+      partOf = [ "backup-timer.service" ];
+      timerConfig.OnCalendar = "*-*-* 4:00:00";
+    };
+    services.backup-timer = {
+      serviceConfig.Type = "oneshot";
+      script = ''
+        BKG_DIR=/var/backup
+
+        EXCLUDE_APPS=("s3/")
+        EXCLUDE_VOLUMES=("wireguard_data")
+        EXCLUDE_CLEANUP=("s3/")
+
+        DAYS=7              # how many days should daily backups be stored
+        DF=daily            # folder name for daily backups
+        WF=weekly           # folder name for weekly backups
+        MF=monthly          # folder name for monthly backups
+
+        MBD=22              # day of month for monthly backup
+        WBD=3               # weekday for weekly backups
+        PV=podman-volumes   # folder name for podman volumes
+
+        cd $BKG_DIR
+        PODMAN_VOLUMES=$(podman volume ls --format '{{.Name}}')
+        # Podman volume backup
+        if [ ! -d $PV ]; then
+            mkdir $PV
+        fi
+        for vol in $PODMAN_VOLUMES; do
+            if [[ " $\{EXCLUDE_VOLUMES[@]} " =~ " $\{vol} " ]]; then
+                continue
+            fi
+            cd $BKG_DIR/$PV
+            podman volume export $vol --output $vol.tar ; gzip $vol.tar
+        done
+
+        BACKUP_APPS=$(fd . -td -d 1 $BKG_DIR)
+        # App backup
+        for bkg in $BACKUP_APPS; do
+            if [[ " $\{EXCLUDE_APPS[@]} " =~ " $\{bkg} " ]]; then
+                continue
+            fi
+            cd $bkg
+            #monthly
+            if [ ! -d $MF ]; then
+        	mkdir $MF
+            fi
+            DOM=$(date +%d)
+            if [ $DOM -eq $MBD ]; then
+        	 fd . -tf -d 1 -x cp {/} $MF/$(date +"%Y%m")-{/}
+            fi
+
+            #weekly
+            if [ ! -d $WF ]; then
+        	mkdir $WF
+            fi
+            DOW=$(date +%u)
+            if [ $DOW -eq $WBD ]; then
+        	 fd . -tf -d 1 -x cp {/} $WF/$(date +"%U%Y")-{/}
+            fi
+
+            #dailies
+            if [ ! -d $DF ]; then
+        	mkdir $DF
+            fi
+            fd . -tf -d 1 -x mv {/} $DF/$(date +"%Y%m%d")-{/}
+        done
+
+        # Delete old backups
+        for bkg in $BACKUP_APPS; do
+            if [[ " $\{EXCLUDE_CLEANUP[@]} " =~ " $\{bkg} " ]]; then
+                continue
+            fi
+            fd . $bkg"daily" --changed-before "$DAYS days" -x rm
+            fd . $bkg"weekly" --changed-before "4 weeks" -x rm
+            fd . $bkg"monthly" --changed-before "8 weeks" -x rm
+        done
+      '';
+    };
+  };
+
+}
diff --git a/hosts/lkk-nix-1/services/default.nix b/hosts/lkk-nix-1/services/default.nix
index a65b070..4cf7481 100644
--- a/hosts/lkk-nix-1/services/default.nix
+++ b/hosts/lkk-nix-1/services/default.nix
@@ -1,5 +1,6 @@
 {
   imports = [
+    ./backup.nix
     ./container.nix
     ./gitea.nix
     ./invidious.nix