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TODO.md

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TODO list for byteback

  • byteback-prune does not cope with the case where the mount point is not writeable (should print error explaining that)

  • retrieve scripts for checking status etc. from Bytemark managed hosts, integrate into main project.

  • byteback-setup-client should support use of own accounts on server (i.e. not forcing you to ssh to byteback@server, change password etc.)

  • byteback directory should be at the end of the load path, not start

  • change default retry parameters to cover 24 hour window

  • "backup could not be marked as complete" message unhelpful on client system - why? (should retry when SSH error == 255, otherwise give up)

  • how do we stop backups from crashing server's kernel?

    • locking up completely (e.g. "touch newfile" never returns)
    • starting to run very very slowly until a btrfsck / remount
    • often nothing to do but "echo b > /proc/sysrq-trigger"

  • give nilfs / zfs a go as alternatives?

  • try to deal with https://btrfs.wiki.kernel.org/index.php/Problem_FAQ#I_get_.22No_space_left_on_device.22_errors.2C_but_df_says_I.27ve_got_lots_of_space ?

  • out-of-date check should suspend judgment when backup is in progress

  • add idea of progress on server side?

  • report differences between backups (new, deleted, changed files)

  • spotting a /var/lib/mysql directory and making a safe snapshot and re-copy of a MySQL data directory (using FLUSH TABLES WITH READ LOCK)

  • (same for postgres using pg_start_backup() and pg_stop_backup())

jhackett@bm-jhackett:~$ sudo byteback-setup-client --destination [email protected] No hostname set, using bm-jhackett.bytemark.co.uk

Skipping key generation, delete /etc/byteback/key if that's wrong [email protected]'s password: /usr/lib/ruby/1.9.1/fileutils.rb:247:in mkdir': Permission denied - bm-jhackett.bytemark.co.uk (Errno::EACCES) from /usr/lib/ruby/1.9.1/fileutils.rb:247:in fu_mkdir' from /usr/lib/ruby/1.9.1/fileutils.rb:221:in block (2 levels) in mkdir_p' from /usr/lib/ruby/1.9.1/fileutils.rb:219:in reverse_each' from /usr/lib/ruby/1.9.1/fileutils.rb:219:in block in mkdir_p' from /usr/lib/ruby/1.9.1/fileutils.rb:205:in each' from /usr/lib/ruby/1.9.1/fileutils.rb:205:in mkdir_p' from /usr/bin/byteback-setup-client-receive:30:in

' *** Remote setup didn't work jhackett@bm-jhackett:~$ sudo byteback-setup-client --destination [email protected] No hostname set, using bm-jhackett.bytemark.co.uk

Skipping key generation, delete /etc/byteback/key if that's wrong [email protected]'s password: Create subvolume 'bm-jhackett.bytemark.co.uk/current' Setup worked! To take your first backup run: byteback-backup --verbose jhackett@bm-jhackett:$ sudo byteback-backup --verbose system: ssh -o BatchMode=yes -o ConnectionAttempts=5 -o ConnectTimeout=30 -o ServerAliveInterval=60 -o TCPKeepAlive=yes -x -a -i /etc/byteback/key -l byteback@byteback byteback-server.default.tethra.uk0.bigv.io byteback-receive --ping --verbose Permission denied (publickey,password). *** Could not connect to byteback@[email protected]: jhackett@bm-jhackett:$ sudo -u ^Cyteback-backup --verbose jhackett@bm-jhackett:~$ cd /etc/byteback/ jhackett@bm-jhackett:/etc/byteback$ ls destination key key.pub jhackett@bm-jhackett:/etc/byteback$ cat destination byteback@[email protected] jhackett@bm-jhackett:/etc/byteback$ dpkg -l | ^C