system-config/doc/source/gerrit.rst

title

Gerrit Installation

Gerrit

Objective

A workflow where developers submit changes to gerrit, changes are peer-reviewed and automatically tested by Jenkins before being committed to the main repo. The public repo is on github.

References

• http://gerrit.googlecode.com/svn/documentation/2.2.1/install.html
• http://feeding.cloud.geek.nz/2011/04/code-reviews-with-gerrit-and-gitorious.html
• http://feeding.cloud.geek.nz/2011/05/integrating-launchpad-and-gerrit-code.html
• http://www.infoq.com/articles/Gerrit-jenkins-hudson
• https://wiki.jenkins-ci.org/display/JENKINS/Gerrit+Trigger
• https://wiki.mahara.org/index.php/Developer_Area/Developer_Tools

Known Issues

• Don't use innodb until at least gerrit 2.2.2 because of: http://code.google.com/p/gerrit/issues/detail?id=518

Installation

Host Installation

Prepare Host

This sets the host up with the standard OpenStack system administration configuration. Skip this if you're not setting up a host for use by the OpenStack project.

sudo apt-get install puppet git openjdk-6-jre-headless mysql-server
git clone git://github.com/openstack-infra/config.git
cd config/
sudo bash run_puppet.sh

Install MySQL

Basic configuration of MySQL is handled via puppet.

Install Gerrit

Note that Openstack's gerrit installation currently uses a custom .war of gerrit 2.2.2. The following instruction is for the generic gerrit binaries:

wget http://gerrit.googlecode.com/files/gerrit-2.2.1.war
mv gerrit-2.2.1.war gerrit.war
java -jar gerrit.war init -d review_site

The .war file will bring up an interactive tool to change the settings, these should be set as follows. Note that the password configured earlier for MySQL should be provided when prompted:

*** Gerrit Code Review 2.2.1
***

Create '/home/gerrit2/review_site' [Y/n]?

*** Git Repositories
***

Location of Git repositories   [git]:

*** SQL Database
***

Database server type           [H2/?]: ?
Supported options are:
h2
postgresql
mysql
jdbc
Database server type           [H2/?]: mysql

Gerrit Code Review is not shipped with MySQL Connector/J 5.1.10
**  This library is required for your configuration. **
Download and install it now [Y/n]?
Downloading http://repo2.maven.org/maven2/mysql/mysql-connector-java/5.1.10/mysql-connector-java-5.1.10.jar ... OK
Checksum mysql-connector-java-5.1.10.jar OK
Server hostname                [localhost]:
Server port                    [(MYSQL default)]:
Database name                  [reviewdb]:
Database username              [gerrit2]:
gerrit2's password             :
confirm password :

*** User Authentication
***

Authentication method          [OPENID/?]:

*** Email Delivery
***

SMTP server hostname           [localhost]:
SMTP server port               [(default)]:
SMTP encryption                [NONE/?]:
SMTP username                  :

*** Container Process
***

Run as                         [gerrit2]:
Java runtime                   [/usr/lib/jvm/java-6-openjdk/jre]:
Copy gerrit.war to /home/gerrit2/review_site/bin/gerrit.war [Y/n]?
Copying gerrit.war to /home/gerrit2/review_site/bin/gerrit.war

*** SSH Daemon
***

Listen on address              [*]:
Listen on port                 [29418]:

Gerrit Code Review is not shipped with Bouncy Castle Crypto v144
If available, Gerrit can take advantage of features
in the library, but will also function without it.
Download and install it now [Y/n]?
Downloading http://www.bouncycastle.org/download/bcprov-jdk16-144.jar ... OK
Checksum bcprov-jdk16-144.jar OK
Generating SSH host key ... rsa... dsa... done

*** HTTP Daemon
***

Behind reverse proxy           [y/N]? y
Proxy uses SSL (https://)      [y/N]? y
Subdirectory on proxy server   [/]:
Listen on address              [*]:
Listen on port                 [8081]:
Canonical URL                  [https://review.openstack.org/]:

Initialized /home/gerrit2/review_site
Executing /home/gerrit2/review_site/bin/gerrit.sh start
Starting Gerrit Code Review: OK
Waiting for server to start ... OK
Opening browser ...
Please open a browser and go to https://review.openstack.org/#admin,projects

Configure Gerrit

The file /home/gerrit2/review_site/etc/gerrit.config will be setup automatically by puppet.

Set Gerrit to start on boot:

ln -snf /home/gerrit2/review_site/bin/gerrit.sh /etc/init.d/gerrit
update-rc.d gerrit defaults 90 10

Then create the file /etc/default/gerritcodereview with the following contents:

GERRIT_SITE=/home/gerrit2/review_site

Add "Approved" review type to gerrit:

mysql -u root -p
use reviewdb;
insert into approval_categories values ('Approved', 'A', 2, 'MaxNoBlock', 'N', 'APRV');
insert into approval_category_values values ('No score', 'APRV', 0);
insert into approval_category_values values ('Approved', 'APRV', 1);
update approval_category_values set name = "Looks good to me (core reviewer)" where name="Looks good to me, approved";

Expand "Verified" review type to -2/+2:

mysql -u root -p
use reviewdb;
update approval_category_values set value=2
  where value=1 and category_id='VRIF';
update approval_category_values set value=-2
  where value=-1 and category_id='VRIF';
insert into approval_category_values values
  ("Doesn't seem to work","VRIF",-1),
  ("Works for me","VRIF","1");

Reword the default messages that use the word Submit, as they imply that we're not happy with people for submitting the patch in the first place:

mysql -u root -p
use reviewdb;
update approval_category_values set name="Do not merge"
  where category_id='CRVW' and value=-2;
update approval_category_values
  set name="I would prefer that you didn't merge this"
  where category_id='CRVW' and value=-1;

OpenStack currently uses Gerrit's built in CLA system. This configuration is not recommended for new projects and is merely an artifact of legal requirements placed on the OpenStack project. Here are the SQL commands to set it up:

insert into contributor_agreements values (
'Y', 'Y', 'Y', 'ICLA',
'OpenStack Individual Contributor License Agreement',
'static/cla.html', 2);

Install Apache

apt-get install apache2

Create: /etc/apache2/sites-available/gerrit:

<VirtualHost *:80>
  ServerAdmin webmaster@localhost

  ErrorLog ${APACHE_LOG_DIR}/gerrit-error.log

  LogLevel warn

  CustomLog ${APACHE_LOG_DIR}/gerrit-access.log combined

  Redirect / https://review-dev.openstack.org/

</VirtualHost>

<IfModule mod_ssl.c>
<VirtualHost _default_:443>
  ServerAdmin webmaster@localhost

  ErrorLog ${APACHE_LOG_DIR}/gerrit-ssl-error.log

  LogLevel warn

  CustomLog ${APACHE_LOG_DIR}/gerrit-ssl-access.log combined

  SSLEngine on

  SSLCertificateFile    /etc/ssl/certs/ssl-cert-snakeoil.pem
  SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key
  #SSLCertificateChainFile /etc/apache2/ssl.crt/server-ca.crt

  <FilesMatch "\.(cgi|shtml|phtml|php)$">
      SSLOptions +StdEnvVars
  </FilesMatch>
  <Directory /usr/lib/cgi-bin>
      SSLOptions +StdEnvVars
  </Directory>

  BrowserMatch "MSIE [2-6]" \
      nokeepalive ssl-unclean-shutdown \
      downgrade-1.0 force-response-1.0
  # MSIE 7 and newer should be able to use keepalive
  BrowserMatch "MSIE [17-9]" ssl-unclean-shutdown

  RewriteEngine on
  RewriteCond %{HTTP_HOST} !review-dev.openstack.org
  RewriteRule ^.*$ https://review-dev.openstack.org/

      ProxyPassReverse / http://localhost:8081/
      <Location />
        Order allow,deny
        Allow from all
        ProxyPass http://localhost:8081/ retry=0
      </Location>


</VirtualHost>
</IfModule>

Run the following commands:

a2enmod ssl proxy proxy_http rewrite
a2ensite gerrit
a2dissite default

Install Exim

apt-get install exim4
dpkg-reconfigure exim4-config

Choose "internet site", otherwise select defaults

edit: /etc/default/exim4 :

QUEUEINTERVAL='5m'

GitHub Setup

Generate an SSH key for Gerrit for use on GitHub

sudo su - gerrit2
gerrit2@gerrit:~$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/gerrit2/.ssh/id_rsa):
Created directory '/home/gerrit2/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:

GitHub Configuration

1. create openstack-gerrit user on github
2. add gerrit2 ssh public key to openstack-gerrit user
3. create gerrit team in openstack org on github with push/pull access
4. add openstack-gerrit to gerrit team in openstack org
5. add public master repo to gerrit team in openstack org
6. save github host key in known_hosts

gerrit2@gerrit:~$ ssh git@github.com
The authenticity of host 'github.com (207.97.227.239)' can't be established.
RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'github.com,207.97.227.239' (RSA) to the list of known hosts.
PTY allocation request failed on channel 0

You will also need to create the file github-projects.secure.config in the /etc/github/ directory. The contents of this are as follows:

[github]
username = guthub-user
password = string

The username should be the github username for gerrit to use when communicating with github. The api_token can be found in github's account setting for the account.

Gerrit Replication to GitHub

The file review_site/etc/replication.config is needed with the following contents:

[remote "github"]
url = git@github.com:${name}.git

Jenkins / Gerrit Integration

Create a Jenkins User in Gerrit

With the jenkins public key, as a gerrit admin user:

cat jenkins.pub | ssh -p29418 review.openstack.org gerrit create-account --ssh-key - --full-name Jenkins --email jenkins@openstack.org jenkins

Create "CI Systems" group in gerrit, make jenkins a member

Create a Gerrit Git Prep Job in Jenkins

When gating trunk with Jenkins, we want to test changes as they will appear once merged by Gerrit, but the gerrit trigger plugin will, by default, test them as submitted. If HEAD moves on while the change is under review, it may end up getting merged with HEAD, and we want to test the result.

To do that, make sure the "Hudson Template Project plugin" is installed, then set up a new job called "Gerrit Git Prep", and add a shell command build step (no other configuration):

#!/bin/sh -x
git checkout $GERRIT_BRANCH
git reset --hard remotes/origin/$GERRIT_BRANCH
git merge FETCH_HEAD
CODE=$?
if [ ${CODE} -ne 0 ]; then
  git reset --hard remotes/origin/$GERRIT_BRANCH
  exit ${CODE}
fi

Later, we will configure Jenkins jobs that we want to behave this way to use this build step.

Auto Review Expiry

Puppet automatically installs a daily cron job called expire-old-reviews onto the gerrit servers. This script follows two rules:

1. If the review hasn't been touched in 2 weeks, mark as abandoned.
2. If there is a negative review and it hasn't been touched in 1 week, mark as abandoned.

If your review gets touched by either of these rules it is possible to unabandon a review on the gerrit web interface.

Launchpad Integration

Keys

The key for the launchpad account is in ~/.ssh/launchpad_rsa. Connecting to Launchpad requires oauth authentication - so open the URL in a browser and log in to launchpad as the hudson-openstack user. Subsequent runs will use the cached credentials.

Gerrit IRC Bot

Installation

Ensure there is an up-to-date checkout of openstack-infra/config in ~gerrit2.

apt-get install python-irclib python-daemon python-yaml
cp ~gerrit2/openstack-infra/config/gerritbot.init /etc/init.d
chmod a+x /etc/init.d/gerritbot
update-rc.d gerritbot defaults
su - gerrit2
ssh-keygen -f /home/gerrit2/.ssh/gerritbot_rsa

As a Gerrit admin, create a user for gerritbot:

cat ~gerrit2/.ssh/gerritbot_rsa | ssh -p29418 review.openstack.org gerrit create-account --ssh-key - --full-name GerritBot gerritbot

Configure gerritbot, including which events should be announced in the gerritbot.config file:

[ircbot]
nick=NICNAME
pass=PASSWORD
server=chat.freenode.net
channel=openstack-dev
port=6667

[gerrit]
user=gerritbot
key=/home/gerrit2/.ssh/gerritbot_rsa
host=review.openstack.org
port=29418
events=patchset-created, change-merged, x-vrif-minus-1, x-crvw-minus-2

Register an account with NickServ on FreeNode, and put the account and password in the config file.

sudo /etc/init.d/gerritbot start

Launchpad Bug Integration

In addition to the hyperlinks provided by the regex in gerrit.config, we use a Gerrit hook to update Launchpad bugs when changes referencing them are applied.

Installation

Ensure an up-to-date checkout of openstack-infra/config is in ~gerrit2.

apt-get install python-pyme
cp ~gerrit2/gerrit-hooks/change-merged ~gerrit2/review_site/hooks/

Create a GPG and register it with Launchpad:

gerrit2@gerrit:~$ gpg --gen-key
gpg (GnuPG) 1.4.11; Copyright (C) 2010 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Please select what kind of key you want:
   (1) RSA and RSA (default)
   (2) DSA and Elgamal
   (3) DSA (sign only)
   (4) RSA (sign only)
Your selection?
RSA keys may be between 1024 and 4096 bits long.
What keysize do you want? (2048)
Requested keysize is 2048 bits
Please specify how long the key should be valid.
         0 = key does not expire
      <n>  = key expires in n days
      <n>w = key expires in n weeks
      <n>m = key expires in n months
      <n>y = key expires in n years
Key is valid for? (0)
Key does not expire at all
Is this correct? (y/N) y

You need a user ID to identify your key; the software constructs the user ID
from the Real Name, Comment and Email Address in this form:
    "Heinrich Heine (Der Dichter) <heinrichh@duesseldorf.de>"

Real name: Openstack Gerrit
Email address: review@openstack.org
Comment:
You selected this USER-ID:
    "Openstack Gerrit <review@openstack.org>"

Change (N)ame, (C)omment, (E)mail or (O)kay/(Q)uit? o
You need a Passphrase to protect your secret key.

gpg: gpg-agent is not available in this session
You don't want a passphrase - this is probably a *bad* idea!
I will do it anyway.  You can change your passphrase at any time,
using this program with the option "--edit-key".

We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.

gpg: /home/gerrit2/.gnupg/trustdb.gpg: trustdb created
gpg: key 382ACA7F marked as ultimately trusted
public and secret key created and signed.

gpg: checking the trustdb
gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
gpg: depth: 0  valid:   1  signed:   0  trust: 0-, 0q, 0n, 0m, 0f, 1u
pub   2048R/382ACA7F 2011-07-26
        Key fingerprint = 21EF 7F30 C281 F61F 44CD  EC48 7424 9762 382A CA7F
uid                  Openstack Gerrit <review@openstack.org>
sub   2048R/95F6FA4A 2011-07-26

gerrit2@gerrit:~$ gpg --send-keys --keyserver keyserver.ubuntu.com 382ACA7F
gpg: sending key 382ACA7F to hkp server keyserver.ubuntu.com

Log into the Launchpad account and add the GPG key to the account.

Adding New Projects

Generate an SSH key for Gerrit

sudo su - gerrit2
gerrit2@gerrit:~$ ssh-keygen -f ~/.ssh/example_project_id_rsa
Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:

---

Creating a new Gerrit Project with Puppet

Gerrit project creation is now managed through changes to the openstack-infra/config repository. The old manual processes are documented below as the processes are still valid and documentation of them may still be useful when dealing with corner cases. That said, you should use this method whenever possible.

Puppet and its related scripts are able to create the new project in Gerrit, create the new project on Github, create a local git replica on the Gerrit host, configure the project Access Controls, and create new groups in Gerrit that are mentioned in the Access Controls. You might also want to configure Zuul and Jenkins to run tests on the new project. The details for that process are in the next section.

Gerrit projects are configured in the openstack-infra/config:modules/openstack_project/templates/review.projects.yaml.erb. file. This file contains two sections, the first is a set of default config values that each project can override, and the second is a list of projects (each may contain their own overrides).

As a Gerrit admin, create a user for example-project-creator:

cat ~gerrit2/.ssh/example_project_id_rsa | ssh -p29418 review.openstack.org gerrit create-account --ssh-key - --full-name "Example Project Creator" --email example-project-creator@example.org example-project-creator

1. Config default values:

   - homepage: http://example.org
     local-git-dir: /var/lib/git
     gerrit-host: review.example.org
     gerrit-user: example-project-creator
     gerrit-key: /home/gerrit2/.ssh/example_project_id_rsa
     github-config: /etc/github/github-projects.secure.config
     has-wiki: False
     has-issues: False
     has-pull-requests: False
     has-downloads: False

Note The gerrit-user 'example-project-creator' should be added to the "Project Bootstrapers" group in acl.

1. Project definition:

   - project: example/gerrit
     description: Fork of Gerrit used by Example
     remote: https://gerrit.googlesource.com/gerrit
   - project: example/project1
     description: Best project ever.
     has-wiki: True
     acl-config: /path/to/acl/file

The above config gives puppet and its related scripts enough information to create new projects, but not enough to add access controls to each project. To add access control you need to have have an acl-config option for the project in review.projects.yaml.erb file. That option should have a value that is a path to the project.config for that project.

That is the high level view of how we can configure projects using the pupppet repository. To create an actual change that does all of this for a single project you will want to do the following:

1. Add a modules/openstack_project/files/gerrit/acls/project-name.config file to the repo. You can refer to the project-config section below if you need more details on writing the project.config file, but contents will probably end up looking like the below block (note that the sections are in alphabetical order and each indentation is 8 spaces):

   [access "refs/heads/*"]
           label-Code-Review = -2..+2 group project-name-core
           label-Approved = +0..+1 group project-name-core
           workInProgress = group project-name-core
   [access "refs/heads/milestone-proposed"]
           label-Code-Review = -2..+2 group project-name-milestone
           label-Approved = +0..+1 group project-name-milestone
   [project]
           state = active
   [receive]
           requireChangeId = true
           requireContributorAgreement = true
   [submit]
           mergeContent = true

2. Add a project entry for the project in openstack-infra/config:modules/openstack_project/templates/review.projects.yaml.erb.:

   - project: openstack/project-name
     acl-config: /home/gerrit2/acls/project-name.config

3. If there is an existing repo that is being replaced by this new project you can set the upstream value for the project. When an upstream is set, that upstream will be cloned and pushed into Gerrit instead of an empty repository. eg:

   - project: openstack/project-name
     acl-config: /home/gerrit2/acls/project-name.config
     upstream: git://github.com/awesumsauce/project-name.git

That is all you need to do. Push the change to gerrit and if necessary modify group membership for the groups you configured in the project.config through Launchpad.

Have Zuul Monitor a Gerrit Project

Define the required jenkins jobs for this project using the Jenkins Job Builder. Edit openstack-infra/config:modules/openstack_project/files/jenkins_job_builder/config/projects.yaml and add the desired jobs. Most projects will use the python jobs template.

A minimum config:

- project:
    name: PROJECT
    github-org: openstack
    node: precise
    tarball-site: tarballs.openstack.org
    doc-publisher-site: docs.openstack.org

    jobs:
      - python-jobs

Full example config for nova:

- project:
    name: nova
    github-org: openstack
    node: precise
    tarball-site: tarballs.openstack.org
    doc-publisher-site: docs.openstack.org

    jobs:
      - python-jobs
      - python-diablo-bitrot-jobs
      - python-essex-bitrot-jobs
      - openstack-publish-jobs
      - gate-{name}-pylint

Edit openstack-infra/config:modules/openstack_project/files/zuul/layout.yaml and add the required jenkins jobs to this project. At a minimum you will probably need the gate-PROJECT-merge test in the check and gate queues.

A minimum config:

- name: openstack/PROJECT
    check:
      - gate-PROJECT-merge:
    gate:
      - gate-PROJECT-merge:

Full example config for nova:

- name: openstack/nova
    check:
      - gate-nova-merge:
      - gate-nova-docs
      - gate-nova-pep8
      - gate-nova-python26
      - gate-nova-python27
      - gate-tempest-devstack-vm
      - gate-tempest-devstack-vm-cinder
      - gate-nova-pylint
    gate:
      - gate-nova-merge:
      - gate-nova-docs
      - gate-nova-pep8
      - gate-nova-python26
      - gate-nova-python27
      - gate-tempest-devstack-vm
      - gate-tempest-devstack-vm-cinder
    post:
      - nova-branch-tarball
      - nova-coverage
      - nova-docs
    pre-release:
      - nova-tarball
    publish:
      - nova-tarball
      - nova-docs

Creating a Project in Gerrit

Using ssh key of a gerrit admin (you):

ssh -p 29418 review.openstack.org gerrit create-project --name openstack/PROJECT

If the project is an API project (eg, image-api), we want it to share some extra permissions that are common to all API projects (eg, the OpenStack documentation coordinators can approve changes, see acl). Run the following command to reparent the project if it is an API project:

ssh -p 29418 review.openstack.org gerrit set-project-parent --parent API-Projects openstack/PROJECT

Add yourself to the "Project Bootstrappers" group in Gerrit which will give you permissions to push to the repo bypassing code review.

Do the initial push of the project with:

git push ssh://USERNAME@review.openstack.org:29418/openstack/PROJECT.git HEAD:refs/heads/master
git push --tags ssh://USERNAME@review.openstack.org:29418/openstack/PROJECT.git

Remove yourself from the "Project Bootstrappers" group, and then set the access controls as specified in acl.

Create a Project in GitHub

As a github openstack admin:

• Visit https://github.com/organizations/openstack
• Click New Repository
• Visit the gerrit team admin page
• Add the new repository to the gerrit team

Pull requests can not be disabled for a project in Github, so instead we have a script that runs from cron to close any open pull requests with instructions to use Gerrit.

• Edit openstack-infra/config:modules/openstack_project/templates/review.projects.yaml.erb

and add the project to the list of projects in the yaml file

For example:

- project: openstack/PROJECT

Adding Local Git Replica

Gerrit replicates all repos to a local directory so that Apache can serve the anonymous http requests out directly.

On the gerrit host:

sudo git --bare init /var/lib/git/openstack/PROJECT.git
sudo chown -R gerrit2:gerrit2 /var/lib/git/openstack/PROJECT.git

Adding A New Project On The Command Line

All of the steps involved in adding a new project to Gerrit can be accomplished via the commandline, with the exception of creating a new repo on github.

First of all, add the .gitreview file to the repo that will be added. Then, assuming an ssh config alias of review for the gerrit instance, as a person in the Project Bootstrappers group:

ssh review gerrit create-project --name openstack/$PROJECT
git review -s
git push gerrit HEAD:refs/heads/master
git push --tags gerrit

At this point, the branch contents will be in gerrit, and the project config settings and ACLs need to be set. These are maintained in a special branch inside of git in gerrit. Check out the branch from git:

git fetch gerrit +refs/meta/*:refs/remotes/gerrit-meta/*
git checkout -b config remotes/gerrit-meta/config

There will be two interesting files, groups and project.config. groups contains UUIDs and names of groups that will be referenced in project.config. UUIDs can be found on the group page in gerrit. Next, edit project.config to look like:

[access "refs/*"]
        owner = group Administrators
[receive]
        requireChangeId = true
        requireContributorAgreement = true
[submit]
        mergeContent = true
[access "refs/heads/*"]
        label-Code-Review = -2..+2 group $PROJECT-core
        label-Approved = +0..+1 group $PROJECT-core
[access "refs/heads/milestone-proposed"]
        label-Code-Review = -2..+2 group $PROJECT-milestone
        label-Approved = +0..+1 group $PROJECT-milestone

If the project is for a client library, the refs/* section of project.config should look like:

[access "refs/*"]
        owner = group Administrators
        create = group $PROJECT-milestone
        pushTag = group $PROJECT-milestone

Replace $PROJECT with the name of the project.

Finally, commit the changes and push the config back up to Gerrit:

git commit -m "Initial project config"
git push gerrit HEAD:refs/meta/config

At this point you can follow the steps above for creating the project's github replica, the local git replica, and zuul monitoring/jenkins jobs.

Migrating a Project from bzr

Add the bzr PPA and install bzr-fastimport:

add-apt-repository ppa:bzr/ppa apt-get update apt-get install bzr-fastimport

Doing this from the bzr PPA is important to ensure at least version 0.10 of bzr-fastimport.

Clone the git-bzr-ng from termie:

git clone https://github.com/termie/git-bzr-ng.git

In git-bzr-ng, you'll find a script, git-bzr. Put it somewhere in your path. Then, to get a git repo which contains the migrated bzr branch, run:

git bzr clone lp:${BRANCHNAME} ${LOCATION}

So, for instance, to do glance, you would do:

git bzr clone lp:glance glance

And you will then have a git repo of glance in the glance dir. This git repo is now suitable for uploading in to gerrit to become the new master repo.

Project Config

There are a few options which need to be enabled on the project in the Admin interface.

• Merge Strategy should be set to "Merge If Necessary"
• "Automatically resolve conflicts" should be enabled
• "Require Change-Id in commit message" should be enabled
• "Require a valid contributor agreement to upload" should be enabled

Optionally, if the PTL agrees to it:

• "Require the first line of the commit to be 50 characters or less" should be enabled.

Access Controls

High level goals:

1. Anonymous users can read all projects.
2. All registered users can perform informational code review (+/-1) on any project.
3. Jenkins can perform verification (blocking or approving: +/-1).
4. All registered users can create changes.
5. The OpenStack Release Manager and Jenkins can tag releases (push annotated tags).
6. Members of $PROJECT-core group can perform full code review (blocking or approving: +/- 2), and submit changes to be merged.
7. Members of openstack-release (Release Manager and PTLs), and $PROJECT-milestone (PTL and release minded people) exclusively can perform full code review (blocking or approving: +/- 2), and submit changes to be merged on milestone-proposed branches.
8. Full code review (+/- 2) of API projects should be available to the -core group of the corresponding implementation project as well as to the OpenStack Documentation Coordinators.
9. Full code review of stable branches should be available to the -core group of the project as well as the openstack-stable-maint group.
10. Drivers (PTL and delegates) of client library projects should be able to add tags (which are automatically used to trigger releases).

To manage API project permissions collectively across projects, API projects are reparented to the "API-Projects" meta-project instead of "All-Projects". This causes them to inherit permissions from the API-Projects project (which, in turn, inherits from All-Projects).

These permissions try to achieve the high level goals:

All Projects (metaproject):
  refs/*
    read: anonymous
    push annotated tag: release managers, ci tools, project bootstrappers
    forge author identity: registered users
    forge committer identity: project bootstrappers
    push (w/ force push): project bootstrappers
    create reference: project bootstrappers, release managers
    push merge commit: project bootstrappers

  refs/for/refs/*
    push: registered users

  refs/heads/*
    label code review:
      -1/+1: registered users
      -2/+2: project bootstrappers
    label verified:
      -2/+2: ci tools
      -2/+2: project bootstrappers
      -1/+1: external tools
    label approved 0/+1: project bootstrappers
    submit: ci tools
    submit: project bootstrappers

  refs/heads/milestone-proposed
    label code review (exclusive):
      -2/+2 openstack-release
      -1/+1 registered users
    label approved (exclusive): 0/+1: openstack-release
    owner: openstack-release

  refs/heads/stable/*
    label code review (exclusive):
      -2/+2 opestack-stable-maint
      -1/+1 registered users
    label approved (exclusive): 0/+1: opestack-stable-maint

  refs/meta/*
    push: project bootstrappers

  refs/meta/config
    read: project bootstrappers
    read: project owners

API Projects (metaproject):
  refs/*
    owner: Administrators

  refs/heads/*
    label code review -2/+2: openstack-doc-core
    label approved 0/+1: openstack-doc-core

project foo:
  refs/*
    owner: Administrators
    create reference: foo-milestone  [client library only]
    push annotated tag: foo-milestone  [client library only]

  refs/heads/*
    label code review -2/+2: foo-core
    label approved 0/+1: foo-core

  refs/heads/milestone-proposed
    label code review -2/+2: foo-milestone
    label approved 0/+1: foo-milestone

Renaming a Project

Renaming a project is not automated and is disruptive to developers, so it should be avoided. Allow for an hour of downtime for the project in question, and about 10 minutes of downtime for all of Gerrit. All Gerrit changes, merged and open, will carry over, so in-progress changes do not need to be merged before the move.

To rename a project:

1. Prepare a change to the Puppet configuration which updates projects.yaml/ACLs and jenkins-job-builder for the new name.

2. Stop puppet on review.openstack.org to prevent your interim configuration changes from being reset by the project management routines:

   sudo puppetd --disable

3. Make the project inacessible by editing the Access pane. Add a "read" ACL for "Administrators", and mark it "exclusive". Be sure to save changes.

4. Update the database on review.openstack.org:

   sudo mysql --defaults-file=/etc/mysql/debian.cnf reviewdb
   
   update account_project_watches
   set project_name = "openstack/NEW"
   where project_name = "openstack/OLD";
   
   update changes
   set dest_project_name = "openstack/NEW"
   where dest_project_name = "openstack/OLD";

5. Take Jenkins offline through its WebUI.

6. Stop Gerrit on review.openstack.org and move both the Git repository and the mirror:

   sudo invoke-rc.d gerrit stop
   sudo mv ~gerrit2/review_site/git/openstack/{OLD,NEW}.git
   sudo mv /var/lib/git/openstack/{OLD,NEW}.git
   sudo invoke-rc.d gerrit start

7. Bring Jenkins online through its WebUI.

8. Merge the prepared Puppet configuration change, removing the original Jenkins jobs via the Jenkins WebUI later if needed.

9. Start puppet again on review.openstack.org:

   sudo puppetd --enable

10. Rename the project in GitHub or, if this is a move to a new org, let the project management run create it for you and then remove the original later (assuming you have sufficient permissions).

11. If this is an org move and the project name itself is not changing, gate jobs may fail due to outdated remote URLs. Clear the workspaces on persistent Jenkins slaves to mitigate this:

    ssh -t $h.slave.openstack.org 'sudo rm -rf ~jenkins/workspace/*PROJECT*'

12. Again, if this is an org move rather than a rename and the GitHub project has been created but is empty, trigger replication to populate it:

    ssh -p 29418 review.openstack.org gerrit replicate --all

13. Wait for puppet changes to be applied so that the earlier restrictive ACL will be reset for you (ending the outage for this project).

14. Submit a change that updates .gitreview with the new location of the project.

Developers will either need to re-clone a new copy of the repository, or manually update their remotes with something like:

git remote set-url origin https://github.com/$ORG/$PROJECT.git

Deleting a User from Gerrit

This isn't normally necessary, but if you find that you need to completely delete an account from Gerrit, here's how:

delete from account_agreements where account_id=NNNN;
delete from account_diff_preferences where id=NNNN;
delete from account_external_ids where account_id=NNNN;
delete from account_group_members where account_id=NNNN;
delete from account_group_members_audit where account_id=NNNN;
delete from account_patch_reviews where account_id=NNNN;
delete from account_project_watches where account_id=NNNN;
delete from account_ssh_keys where account_id=NNNN;
delete from accounts where account_id=NNNN;

ssh review.openstack.org -p29418 gerrit flush-caches --all