Ceph » Stable releases

After the [[HOWTO run integration and upgrade tests|tests successfully]] run on the [[HOWTO populate the integration branch|integration branch]]:

h3. Get approval on a backport

The backports that were done by someone in the *stable releases* team need to be approved by a developer or a lead, even after successfully passing the relevant teuthology suite. Although a discussion with the developer or the lead could be engaged before testing, it is less work for a busy developer or lead to review a backport that is known to pass integration tests. 

* List the pull requests that have been merged in the integration branch with something like:

<pre>

$ git log --oneline --merges ceph/giant..ceph/giant-backports

538d012 Merge 4214: osd/osd_types.cc: 456: FAILED assert(m_seed < old_pg_num)

</pre>

* For each commit in each pull request, lookup the person who merged the backported commit in master

** follow the link on the commit hash of the *cherry-pick from* part of the commit message of the backport

** follow the link to the pull request that included this commit

** the person who merged the pull request was responsible for merging this commit in master

* If there are more than one person responsible for merging the commits of a given pull request, pick one (at random if there does not seem to be a reason to chose one rather than the other)

* Ask the person responsible for merging the commits, via a comment in the pull request:

<pre>

@person this backport passed the XXX suite (URL to the pulpito page for the suite), do you think it can be merged ?

</pre>

* The person can either merge the pull request (her|him)self or add a comment like LGTM.

h3. Merge a pull request

The backports from the integration branch can be merged (via github so that the pull requests are properly tagged as being merged) into the release branch if:

* the backport was done by the original developer of the commit

* the backport was approved by the developer or the lead (see above)

Merging the pull requests goes like this:

* for each pull request merged in the integration branch

* go to the github web interface

* click on the "Merge button"

* add the "Reviewed-by:" field to the input box

* when all pull requests are merged **git log --format='%H %s' --graph ceph/$release..ceph/$release-backports** must not show any commit (i.e. the integration branch must have nothing left because all cherry-picked commits are now found in the $release branch).

* the $release-backports branch is reset to the $release branch to make it clear that it has been merged (git reset --hard ceph/$release)

h3. Resolving the matching issue

For each pull request that is merged:

* go to the corresponding issue that should be listed as a link in the pull request comment

* change the status of the issue to *Resolved*

Note: Since the merge is not from the integration branch, the commit that has been tested won't match the SHA. This is inconvenient when trying to figure out if a mistake has been done. The content of the integration branch should be merged with a script instead of manually via the github web interface to avoid mistakes.