X-Git-Url: https://git.frykholm.com/butterbackup.git/blobdiff_plain/f0a474cc3fffb605079ea05815d94b93625212c9..41690a07f95e91c0c629013e2fb179a7e9e755bc:/butterbackup.py

diff --git a/butterbackup.py b/butterbackup.py
index a049efc..a1086b9 100755
--- a/butterbackup.py
+++ b/butterbackup.py
@@ -1,53 +1,99 @@
 #!/usr/bin/env python3
 import os
 import sys
-from subprocess import check_call
+from subprocess import check_call, CalledProcessError
 import shlex
 import datetime
-class BackupRunner():
-    def __init__(self, config_dir, dest_dir):
-        self.config_dir = config_dir
-        self.dest_dir = dest_dir
-        if not os.path.exists(self.config_dir):
-            print("No config found", self.config_dir)
-            sys-exit(-1)
+import configparser
 
-    def run(self):
-        self.hosts = os.listdir(self.config_dir)
-        for host in self.hosts:
-            fp = open(os.path.join(self.config_dir, host),"r")
-            self.backup_host(host, fp)
-            fp.close()
+class Host():
+    def __init__(self, name, config):
+        self.name = name
+        self.config = config 
+        if not self.config.has_section('host'):
+            self.config.add_section('host')
+        self.store_dir = self.config['host']['store_dir']
+        self.host_dir = os.path.join(self.store_dir, name)
+        self.subvol_dir = os.path.join(self.host_dir, "latest")
+        self.keep = int(self.config.get("host", "keep", fallback=-1))
 
-    def backup_host(self, host, host_config):
-        subvol_dir = os.path.join(self.dest_dir, host)
-        dest_dir = os.path.join(subvol_dir, "latest")
-        if not os.path.exists(subvol_dir):
-            print("New host",host,".")
+    def backup(self):
+        if not os.path.exists(self.host_dir):
+            print("New host",self.name,".")
+            os.makedirs(self.host_dir)
+        if not os.path.exists(self.subvol_dir):
             try:
-                check_call(shlex.split("btrfs subvol create %s"% subvol_dir))
-            except subprocess.CalledProcessError as ex:
+                check_call(shlex.split("btrfs subvol create %s"% self.subvol_dir))
+            except CalledProcessError as ex:
                 print("Failed to create subvol! Aborting backup.")
                 return() 
-            os.makedirs(dest_dir)
-        command = ("rsync --timeout=10 -a --numeric-ids --delete --delete-excluded --human-readable --inplace ")
-        excludes = host_config.readline()[:-1]
+            
+        command = ("rsync -a --acls --xattrs --whole-file --numeric-ids --delete --delete-excluded --human-readable --inplace ")
+        excludes = " --exclude " + " --exclude ".join(self.config.get("host", "exclude").split(',')) #FIXME
         try:
-            check_call(shlex.split(command + excludes + " root@%s:/ "%(host) + dest_dir))
-        except subprocess.CalledProcessError as ex:
-            if ex.returncode not in (30, 255):
-                print("Rsync did not transfer anything, skipping snapshot.")
+            print(command + excludes + " root@%s:/ "%(self.name) + self.subvol_dir)
+            check_call(shlex.split(command + excludes + " root@%s:/ "%(self.name) + self.subvol_dir))
+        except CalledProcessError as ex:
+            if ex.returncode in (24,):
+                pass
+            else:
+                print("Rsync error from %s, skipping snapshot. Rsync exit value=%s"%(self.name, ex.returncode))
                 return()
         todays_date = datetime.datetime.now().date().strftime("%F")
+        if os.path.exists(os.path.join(self.host_dir, todays_date)):
+            #There is a snapshot for today, removing it and creating a new one
+            try:
+                check_call(shlex.split("btrfs subvol delete %s"%(os.path.join(self.host_dir, todays_date))))
+            except CalledProcessError as ex: 
+                pass    
         try:
-            check_call(shlex.split("btrfs subvol snapshot %s %s"%(subvol_dir,os.path.join(subvol_dir, todays_date))))
-        except subprocess.CalledProcessError as ex: 
+            check_call(shlex.split("btrfs subvol snapshot -r %s %s"%(self.subvol_dir,os.path.join(self.host_dir, todays_date))))
+        except CalledProcessError as ex: 
             pass
 
+    def prune_snapshots(self):
+        if self.keep == -1:
+            print("No keep specified for %s, keeping all"%self.name)
+            return
+        if not os.path.exists(self.host_dir):
+            print("New host, no pruning needed")
+            return
+        snaps = sorted([snap for snap in os.listdir(self.host_dir) if not snap == "latest" ], reverse=True)
+        while len(snaps) > self.keep:
+            snap = snaps.pop()
+            try:
+                check_call(shlex.split("btrfs subvol delete %s"%(os.path.join(self.host_dir, snap))))
+            except CalledProcessError as ex: 
+                pass    
+
+class BackupRunner():
+    def __init__(self, config_dir):
+        self.config_dir = config_dir
+        if not os.path.exists(self.config_dir):
+            print("No config found", self.config_dir)
+            sys-exit(-1)
+
+    def run(self):
+        self.hosts = os.listdir(self.config_dir)
+
+        for host in self.hosts:
+            if host == 'default.cfg':
+                continue
+            try:
+                config = configparser.ConfigParser(strict=False)
+                config.read_file(open(os.path.join(self.config_dir, 'default.cfg'),'r'))
+                config.read(os.path.join(self.config_dir, host))
+            except BaseException as ex:
+                print("Config error for %s. Skipping host."%host)
+                continue
+            h = Host(host, config)
+            h.prune_snapshots()
+            h.backup()
+    
 if __name__ == "__main__":
     if os.geteuid() != 0:
         print("You need to be root. Otherwise all permissions will be lost.")
         sys.exit(-1)
-    br = BackupRunner("/etc/butterbackup", "/mnt/data2")
+    br = BackupRunner("/etc/butterbackup")
     br.run()
     sys.exit(0)