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| author | Sam Gilson <t-sagils@microsoft.com> | 2019-07-15 21:50:33 +0000 |
|---|---|---|
| committer | Server Team CI Bot <josh.powers+server-team-bot@canonical.com> | 2019-07-15 21:50:33 +0000 |
| commit | a24550aee4c7282cd3624bf63f9501444e517678 (patch) | |
| tree | 9dd5d148266673021a56f29c4282b61e6f372898 /doc/rtd/topics/debugging.rst | |
| parent | a6faf3acef02bd8cd4d46ac9efeebf24b3f21d81 (diff) | |
| download | vyos-cloud-init-a24550aee4c7282cd3624bf63f9501444e517678.tar.gz vyos-cloud-init-a24550aee4c7282cd3624bf63f9501444e517678.zip | |
Cloud-init analyze module: Added ability to analyze boot events.
This branch introduces a new command line feature for cloud-init.
Currently, the cloud-init module has the capability to analyze events in
cloud-init.log in three ways: 'show', 'blame', 'dump'.
These changes add a fourth capability, called 'boot'.
Running the command 'cloud-init analyze boot' will provide the user three
timestamps.
1) Timestamp for when the kernel starts initializing.
2) Timestamp for when the kernel finishes its initialization.
3) Timestamp for when systemd activates cloud-init.
This feature enables cloud-init users to analyze different boot phases.
This would aid in debugging performance issues related
to cloud-init startup or tracking regression.
Diffstat (limited to 'doc/rtd/topics/debugging.rst')
| -rw-r--r-- | doc/rtd/topics/debugging.rst | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/doc/rtd/topics/debugging.rst b/doc/rtd/topics/debugging.rst index 51363ea5..e13d9151 100644 --- a/doc/rtd/topics/debugging.rst +++ b/doc/rtd/topics/debugging.rst @@ -68,6 +68,19 @@ subcommands default to reading /var/log/cloud-init.log. 00.00100s (modules-final/config-rightscale_userdata) ... +* ``analyze boot`` Make subprocess calls to the kernel in order to get relevant + pre-cloud-init timestamps, such as the kernel start, kernel finish boot, and cloud-init start. + +.. code-block:: shell-session + + $ cloud-init analyze boot + -- Most Recent Boot Record -- + Kernel Started at: 2019-06-13 15:59:55.809385 + Kernel ended boot at: 2019-06-13 16:00:00.944740 + Kernel time to boot (seconds): 5.135355 + Cloud-init start: 2019-06-13 16:00:05.738396 + Time between Kernel boot and Cloud-init start (seconds): 4.793656 + Analyze quickstart - LXC --------------------------- |