Difference between revisions of "Debugging"
Jump to navigation
Jump to search
(→strace) |
|||
| (One intermediate revision by the same user not shown) | |||
| Line 14: | Line 14: | ||
== Docker C/R == | == Docker C/R == | ||
| − | Docker keeps images in | + | Docker keeps images in and logs in <code>/var/lib/docker/containers//checkpoints/chp_/criu.work/</code> |
== Tracing == | == Tracing == | ||
| Line 22: | Line 22: | ||
== Images == | == Images == | ||
| − | The | + | The [[CRIT]] tool can help to decode [[images]] into a human readable format. |
[[Category:Using]] | [[Category:Using]] | ||
[[Category:Development]] | [[Category:Development]] | ||
[[Category:HOWTO]] | [[Category:HOWTO]] | ||
Latest revision as of 09:48, 16 February 2017
Raise verbosity[edit]
Make sure you use the -v4 option for extended logging and find logs in the work/images directories.
Getting core files[edit]
If CRIU crashes it's useful to build it with debug info and look into core file.
- build CRIU with debug info
make DEBUG=1 - setup core file generation which depends on distro settings, usually the core generation template is sitting in /proc/sys/kernel/core_pattern, see more details at core.5
Then upload core file into debugger gdb criu core-file and type bt command to fetch a backtrace.
Docker C/R[edit]
Docker keeps images in and logs in /var/lib/docker/containers//checkpoints/chp_/criu.work/
Tracing[edit]
CRIU uses ptrace(), so strace can't be used in some cases. perf trace is an alternative way. It isn't so informative, but it is still better than nothing.
Images[edit]
The CRIT tool can help to decode images into a human readable format.