CRIU

Download/criu

Revision as of 20:43, 25 February 2014 by Xemul (talk | contribs) (+ 1.2)


v. 1.2

Tarball: criu-1.2.tar.bz2
Version: 1.2
Released: 26 Feb 2014
GIT tag: v1.2

New features

  • Performance improvements
    • Shared entries in reg-files image
    • Less accesses to /proc/$pid/map_files links
    • Cache for /proc/$pid/pagemap reads
    • VDSO page is seeked only in anonymous mappings
    • Task's auxv is read in one call
    • Merged mm and vma image files for better packing
    • NFS inodes' path resolution (for fsnotify) cache
    • One readlink() call when checking anon inodes
    • Don't dump kernel's zero-page
    • Parse fast /proc/self/maps when searching for hole for restorer
    • A bit faster write into image files with writev()
  • Library versioning
  • RPC API got closer to CLI
  • New "post-restore" call in action scripts
  • Logrotate rules file
  • Default log file for service when starting via systemd

Fixes

  • A lot for ARM cross-compile
  • Fsnotifies dumping didn't work on NFS
  • Images auto-deduplication only worked one level up
  • Packet socket ID was treated as file-descriptor and close()-d
  • Badly counted pages stats on restore
  • Linked remap name conflict when dump and restore on NFS
  • Sporadic failures in memory draining due to huge pipes used
  • Broken criu show of repeated fields
  • Failure to open mountpoint in foreign pid namespace
  • Unlinked bound unix socket dump error
  • Small memory leak when writing to incremental image(s)
  • Restoring fsnotify for links results in ELOOP
  • Host's PATH is not suitable when execv-ing tar/ip/iptable to restore namespace (workaround, proper fix will be in 1.3)
  • Using subdirs in log file name via RPC breaks security

v. 1.1

Tarball: criu-1.1.tar.bz2
Version: 1.1
Released: 28 Jan 2014
GIT tag: v1.1

Fixes

  • Errors from memory dumping are not handled resulting in corrupted dumps
  • EOF detection in stacked images is done with error
  • Stacked images don't work on non-shared FS (missing pagemap-s)

v. 1.1-rc2

Tarball: criu-1.1-rc2.tar.bz2
Version: 1.1-rc2
Released: 20 Jan 2014
GIT tag: v1.1-rc2

Fixes

  • Crash in criu check
  • RPC check always fail on 3.11 kernel
  • Failed fork() didn't abort restore
  • Dump fail not reported via RPC
  • RPC client disconnect wasn't handled
  • Page server could connect to self for writing images
  • Hang on pre-dumping task livig in net-namespace
  • VDSO page mis-handle on pre-dump
  • FPU state loss on pre-dump
  • Memory tracking turns ON w/o request
  • Various fixes (and improvements) in build system

v. 1.1-rc1

Tarball: criu-1.1-rc1.tar.bz2
Version: 1.1-rc1
Released: 30 Dec 2013
GIT tag: v1.1-rc1

New features

  • libcriu.so -- wrapper library for RPC clients
  • Plugins
    • External unix sockets
    • External bind mounts
    • External net devices
    • Unknown file types
  • Images deduplication in incremental dumps
  • Integration with systemd
  • Filtering of criu show output
  Note: The API defined in the first two items above may change after -rc1

Fixes

  • Errors in unlinked files/sockets detection on BTRFS
  • NFS silly-rename files are not treated as unlinked
  • Freezer fail to seize quickly forking/pthread_create-ing tasks
  • Extra stop signal queued for stopped tasks after pre-dump
  • Wrong dying task state detection
  • Lost RPC dump response
  • Crash when reporting restore error via RPC
  • Negative return code into shell
  • Tasks left in wrong states after failed dump
  • A little bit more verbose check action
  • Coverity checks fail here and there

v. 1.0

Tarball: criu-1.0.tar.bz2
Version: 1.0
Released: 25 Nov 2013
GIT tag: v1.0

Fixes

  • After --leave-running linked remaps were not cleaned
  • TCP was left locked after --leave-running
  • Weak criteria in memory COW detection
  • Private mapping's premmapped address overwrote file ID
  • Restorer memory could overlap with timers/signals arrays
  • RPC worker reused options from service task
  • Suboptimal memory utilization by restorer arguments
  • TCP unsent/unacked data boundary was lost
  • Wrong dev_t decoding on 64 bit
  • Unpredictable daemons (service and page-service) working dir
  • Parasite stack could be corrupted by its arguments
  • Error from exe link restore was ignored
  • Artificial small limit on the number of shared memory segments to restore
  • Bug in ARM VFP restore
  • VDSO proxy was unmapped at the very end of restore

New features

  • -W option to specify working dir
  • CHECK request in RPC
  • Optimized headers
  • More info in logs about undumpable files
  • More comments about tricky dump/restore places
  • Generic memory allocation for restorer

v. 0.8

Tarball: criu-0.8.tar.bz2
Version: 0.8
Released: 18 Oct 2013
GIT tag: v0.8

New features

  • RPC service
  • Ability to work from non-root user (via +s bit)
  • Handle stopped tasks
  • Restore tasks' root path
  • Dump and restore net ns iptables configuration (w/o conntracks)
  • Support for external net devices in netns (e.g. openvz venet)
  • Support CORK and NODELAY TCP options
  • SEQPACKET unix sockets support

Fixes and improvements

  • Unload restorer blob after restore
  • Fixes and enhancements in criu show
  • Fix in unsorted inotify wd restoring
  • Fixed trimmed messages in parasite transport
  • Fine-grained pgrps restore
  • Fix in large TCP buffers restore
  • Fixed buffer overflow in IPC ns dumping
  • Fix in early page server connection close on pre-dump
  • Fixed race in handling aborted parasite blob
  • Fixed lost unmapped criu vmas in restore
  • Fixes in parsing devices in /proc/pid/maps and /proc/locks
  • Fixed snd/rcv buf sockoptions restore
  • Enhanced logging in parasite

v. 0.7

Tarball: criu-0.7.tar.bz2
Version: 0.7
Released: 3 Sep 2013
GIT tag: v0.7

New features

  • TUN devices support (requires patched kernel)
  • Alternative stack (sigaltstack) C/R
  • Shared and master/slave mounts support
  • Restore statistics
  • Net device address C/R
  • Safer and simpler asynchronous parasite
  • Fixes in
    • Stack guard page dump/restore
    • Page server communications
    • COW mappings restore
    • Zombies restore
    • Aborting failed restore
    • TCP connection restore (some require patched kernel)
    • Semi-closed Unix sockets with data dump/restore
    • etc.

v. 0.6

Tarball: criu-0.6.tar.bz2
Version: 0.6
Released: 1 Jul 2013
GIT tag: v0.6

New features

  • Cross-compiling support
  • Ready to accept images from OpenVZ RHEL6-based kernel
    • VDSO conversion
  • Posix CPU timers C/R
  • Asynchronous parasite
    • Self-heal dumpee in case of crtools crash
  • Memory changes tracking (requires patched kernel)
    • Incremental backups
    • Pre-dump task command for smaller freeze time
  • Dump statistics
  • Return-arg for remote syscalls execution
  • Improved "show" output
  • Opened /proc/PID/ns/* files C/R
  • Daemon mode for page-server
  • Build-time features test (makes it possible to build on different distros)

v. 0.5

Tarball: criu-0.5.tar.bz2
Version: 0.5
Released: 30 Apr 2013
GIT tag: v0.5

New features

  • C/R netlink sockets
  • C/R pending signals
  • New format for memory dumps
  • Incremental dumps (preliminary)
  • Ability to directly send memory dumps on remote host (for faster live migration)
  • Images showing enhancements
  • Kernel features checking enhancements
  • Lots of BUGs fixed
  • Renamed crtools to criu (both binary and source package names)

v. 0.4

crtools-0.4.tar.bz2
Released: 20 Feb 2013
GIT tag: v0.4

New features

  • ARM port
  • Remote syscall execution
  • C/R of
    • FPU state
    • File locks (basic support)
    • Rlimits
    • FANotify descriptors
    • Shared fdtable (table of file descriptors)
    • Tasks' umask
    • Pipe buffer size
    • Unix sockets' credentials
    • TCP time-stamp offset (allows to migrate a TCP socket, requires custom kernel)
  • Automatic namespaces detection (--namespace option is deprecated)

Internal

  • Build system rework
  • Dumping/restoring memory pointers standardized (while doing ARM port)
  • Ability to collect coverage (gcov, reported here)
  • 32/64-bit problems mostly resolved (while doing ARM port)

v. 0.3

crtools-0.3.tar.bz2
Released: 11 Dec 2012
GIT tag: v0.3

New features

  • C/R of shell jobs
  • Handle files, that are opened and unlinked, but some other hard link exists
  • More SOL_SOCKET socket options. Two most interesting are:
    • Binding socket to device (SO_BINDTODEVICE)
    • Per-socket packet filter (SO_ATTACH_FILTER)
  • Shutdown state of a socket
  • Task scheduler parameters (nice, policy and prio)
  • Properly handle COW pages
  • Memory mapped packet sockets (with SOL- options this is enough for tcpdump tool support)
  • Complementary groups (getgroups(2))
  • Various mapping features, configured with madvise(2)
  • Tune TCP sockets support to work with IPv6 sockets
  • Closed (or not yet connected/bound) unix sockets

Bug fixes and improvements

  • Print timestamps in log files
  • Restructure source tree a little
    • PIE stuff in separate dir
    • Arch-specific code in arch/<Arch>/ directory
  • Nicer show -c output for pages/pipes/etc contents
  • Fixes in help text
  • Save and restore blocked signals mask for threads
  • Don't dump (and warn about it) corked UDP sockets
  • Fixed livelocks when restoring too big socket queues
  • Refresh info about sockets, that might have changed between diag dump and actual process freeze
  • Lost file params and socket options for some unix sockets
  • Fix inotify on opened and unlinked files
  • Fix shared anonymous memory detection
  • Properly close all files before restoring them
  • Fixes in running external tools (ip/tar)
  • Several fixes in control tty restoring code
  • RT signals handlers dumped and restored

v. 0.2

crtools-0.2.tar.bz2
Released: 20 Sep 2012
GIT tag: v0.2

v. 0.1

crtools-0.1.tar.bz2
Released: 23 Jul 2012
GIT tag: v0.1

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