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| author | Ryan Hallisey <rhallise@redhat.com> | 2015-03-11 09:35:00 -0400 |
|---|---|---|
| committer | Ryan Hallisey <rhallise@redhat.com> | 2015-03-18 10:33:42 -0400 |
| commit | 4075c851edc3339adee8ef02bcc291e21b8a738c (patch) | |
| tree | 0c5e56fd03bfc014a1f2dbf5f4ad8b511eca57b6 /docs | |
| parent | 53d7e3b6fa12169463688410202e4f47e358fc06 (diff) | |
| download | kolla-4075c851edc3339adee8ef02bcc291e21b8a738c.tar.gz kolla-4075c851edc3339adee8ef02bcc291e21b8a738c.zip | |
The wait_for function needs to be added into all the images
This affects both fedora and the centos base images.
Wait_for will be intregrated into kolla-common.
Co-authored by: Charles Crouch <charcrou@cisco.com>
Change-Id: Ide2304b787d4c3bf6fb3949f09e2cf1f450c2173
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/wait-for.md | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/docs/wait-for.md b/docs/wait-for.md new file mode 100644 index 000000000..3317c315f --- /dev/null +++ b/docs/wait-for.md @@ -0,0 +1,18 @@ +# Wait-for function + +The usage of the wait_for function looks like the following + $ SCRIPT_NAME LOOPS_NUMBER SLEEP_TIME ARGS + +The ARGS are read and concatenated together into a single command +and the command is executed in a loop until it succeeds or reaches +the max number of attempts (LOOPS_NUMBER). + +An optional FAIL_MATCH_OUTPUT variable may also be set to control +if the loop exits early if the commands stdout/stderr matches the +supplied regex string. +Examples: + $ wait_for 30 10 ping -c 1 192.0.2.2 + $ wait_for 10 1 ls file_we_are_waiting_for + $ wait_for 10 3 date \| grep 8 + $ FAIL_MATCH_OUTPUT=CREATE_FAILED wait_for 30 10 heat stack-show undercloud + $ SUCCESSFUL_MATCH_OUTPUT=CREATE_COMPLETE wait_for 30 10 heat stack-show undercloud |