This page describes how to make a release of Apache Bigtop. Most of the content is shamelessly stolen from the the Whirr release process – thanks Whirr team!
0. Before you begin.
Apache Bigtop is following a predictable "train model" of releases popularized by the Ubuntu Linux. Currently releases happen every quarter. A release of Bigtop is a culmination of a quarter of development activities and also a testament to the particular state of the Hadoop ecosystem at the time. IOW, what are the most cutting edge versions of the components that still work together as an integrated system.
All release activities are coordinated by a volunteer release manager (RM) who is chosen during the release planning. If you happen to be a first time RM here's what you need to do in order to be able to carry out the mechnics of the release
- Generate PGP code signing keys. It's a good idea to generate RSA-based key (see the Binary Package Deployment section below)
- Because of long-standing bug in RPM sigs validation, you can not use subkeys for signing. See here for more information.
- Ensure that your PGP signing keys are available in: https://dist.apache.org/repos/dist/release/bigtop/KEYS More details can be found here. Basically you need:
- $ svn co https://dist.apache.org/repos/dist/release/bigtop; cd bigtop
- $ (gpg --list-sigs <your name> && gpg --armor --export <your name>) >> KEYS
- svn commit -m "Adding <your name>'s code signing key"
- Copy the new KEYS file to the release folder /www/www.apache.org/dist/bigtop on people.apache.org
If you are not already a member of the Web Of Trust (WOT) it would be a good idea to do so. (contact one of the prior release managers, e.g. Rvs, Cos, etc...). You can read more about key signing here.
Ensure that you have setup your ssh keys on people.apache.org, otherwise you'll have to enter your login password a number of times (best use ssh-agent for this as well). A good overview of this process can be found here (ssh-copy-id and ssh-agent in particular)
Workaround: an open issue BIGTOP-1499 requires that the release repo is clean. You can either make a new clone; or remove everything non-related to the repo (including files and directories listed in
Configure scm-publish plugin
Please make sure that you have correct configuration for scm-plugin SVN Provider condifuration. Create
$user.home/.scm/svn-settings.xml with the following content
set the permissions on the directory and the file to 700 as it contains your clean-text password (DANGER!)
See http://stackoverflow.com/questions/3618330/what-is-the-format-of-svn-settings-xml-for-use-with-maven-scm-plugin how to change your scm:svn: url and provide a password.
Done with the above? Proceed with the rest of the steps:
1. Scrubbing the JIRA.
3-4 weeks before a committed release date a release manager (RM) for a given release is supposed to start a process of scrubbing the JIRAs. This involves:
- taking care of all the patch available issues for a given release
- send an email to the bigtop-dev mailing list reminding the community of the upcoming release and asking them to spend 2-3 days raising the priority of the "must fix" issues for a given release to a "Blocker" status AND making sure that Fix Versions field is set to an upcoming release. Of course, it goes without saying that people have to volunteer to work on this issues – this is not an exercise of assigning work to others. Typically everybody has their own favorite issues that they would like to see fixed in the upcoming release, however do encourage folks to also take a look at the Unscheduled issues since those tend to accumulate lurkers. Also 'git grep' for the 'FIXME/WORKAROUD' prefix in the source code as to identify anything that doesn't need to be worked around anymore
- after waiting for 2-3 days for community to respond and for the Blockers to settle down – make sure that the resulting list looks reasonable and that there is a general expectation that the release can happen given the state of the source base.
- create the version tag for the next milestone release: navigate to the https://issues.apache.org/jira/plugins/servlet/project-config/BIGTOP/versions and add the tag there of the form 0.X.Z
- move all the non-blocker issues assigned to the current release to the next one by navigating to (make sure to replace 0.X.Y with your actual version number): https://issues.apache.org/jira/secure/IssueNavigator!executeAdvanced.jspa?jqlQuery=project+%3D+BIGTOP+AND+resolution+%3D+Unresolved+AND+fixVersion+%3D+%220.X.Y%22+and+priority+%21%3D+blocker and then select 'bulk update' from the tools menu (WARNING: MAKE SURE TO UNCHECK the 'Send mail for this update' toggle at the very bottom of the edit screen!!!)
2. Create a Release Series Branch
This only needs doing if this is the first release in a series (X.Y.0).
Update CHANGES.txt in master to replace
Release X.Y.0(unreleased changes)
Release X.Y.0 - YYYY-MM-DD. Commit:
Create a branch for the release series:
A.B.C-SNAPSHOT (unreleased changes)to CHANGES.txt in master.
Bump the version number in the master branch:
- Commit these changes to the master and push.
Checkout the release branch
Update the release branch's version information: the version number in the release branch ends in
-SNAPSHOT, but we need to remove this for the release. For example,
0.8.0-SNAPSHOTneeds to be changed to
Commit these changes to the release branch and push
- Shall you need to commit additional fixes into ongoing release, the commits should go to the release branch and only then be merged into master. Doing this other way around forces
git cherry-pickwhich leads to discrepancies in the commit hash-codes and makes the branch look untidy and hard to follow.
3. Generate the Release Notes
JIRA has the ability to generate release notes automatically (this is why it is so important to keep the fix version number accurate).
Manually check this list for accuracy! I've repeatedly seen closed bugs that were not fixed (i.e., duplicate) marked with a fix version, so that they incorrectly show up in this list. Find those, edit them to remove the fix release (only actually fixed bugs should have a fix release) and re-run the report. A better way to deal with it is to run
Select the correct version. Ask for both plain text and HTML formats.
Paste the plain text notes to the top of CHANGES.txt. Paste the HTML version into src/site/xdoc/release-notes.xml. Check this into master and the branch.
Wrap the title ("Release Notes - Bigtop - Version X.Y.Z") inside an <h3> element.
4. Commit and Tag
Tag, and push the changes and the tag to git:
5. Build and run Package and Smoke Tests
6. Build and Deploy Artifacts
First we need to prepare a build environment. Mac OS X is unlikely supported because we'll run through some tests that depends on the OS. Here I'm running on Ubuntu-14.04 (There's an issue for running on 16.04 traced by BIGTOP-2830).
Create a maven settings file ~/.m2/settings.xml with the following content:
Build the artifacts:
The following command deploys the binary release artifacts for iTest, tests and other helper files, checksums, and signatures (you will need to enter a GPG passphrase) to the Apache Staging repo.
For the last step to succeed you'd need to export HADOOP_HOME and HADOOP_CONF_DIR (BIGTOP-1464): the values don't matter - it is just a workaround. If this step fails with an Access denied error check that you have the required permissions on Nexus.
If the deployment step fails with an Access denied error check that you have the required permissions on Nexus.
If you have multiple keys, the build process seems to pick up the first one w/o asking. Make sure you're using the CODE SIGNING KEY by explicitly specifying it. For example:
Login to https://repository.apache.org using your Apache SVN credentials. Click on Staging on the left. Then click on orgapachebigtop in the list of repositories. In the panel below you should see an open repository that is linked to your username and IP. Select this repository and click Close. This will close the repository from future deployments and make it available for others to view.
BIGTOP-1463 is open to track the improvements of the release process.
7. Copy Release Artifacts
The artifacts that end up in the distribution directory are the source distributions (along with their checksums and signatures), so they need to be copied from the Maven repo to a release candidate directory on apache dist, so the vote can begin:
8. Sanity Check
- Check the SHA1 checksums
9. Run the Vote
Run the vote on the email@example.com
Here is an example email:
The release needs 3 +1 votes from the PMC.
10. Roll Out
Assuming the vote passes, the release can be rolled out as follows:
Move Artifacts into Place
TODO Update the instructions as per new use of apache dist
This step makes the artifacts available on the mirrors.
The last line is to remove the previous version, since only the most recent version on a particular branch should be in the dist directory (older versions are archived automatically, see http://archive.apache.org/dist/bigtop/ and http://www.apache.org/dev/mirrors.html).
Log in to https://repository.apache.org, click on Staging on the left. Select the repository that you closed earlier, and click Release, using a description like "Apache Bigtop X.Y.Z artifacts". This will make the artifacts publicly available.
You'll get an email from "Apache Reporter Service" asking to update the release info. If you aren't a member of the PMC, ask someone to log in and enter the release name and date.
Create permanent release tag under
Deploy binary packages to permanent location
- Building binary packages is an easy feast now, thanks to well-oiled Bigtop CI Ideally, the build job to produce the package will be created during the release preparation and the vote. If not, you can copy and make adjustment to the release job just like this one Bigtop 1.1.0 Once the build is over you should have packages ready for signing.
- Sign packages
On Debian systems create the signature for the top-level Release fil
On RPM-bases distros create ~/.rpmmacors files (due to a bug, RPM can not use DSA keys longer than 1024 bytes, so you better use a buggy RSA for that)
Sign *.repo and *list files
Sync signed packages to bigtop-repos.s3.amazonaws.com (ask a previous release manager about the details and credentials). Be aware: just sync apt/ directory for *.deb distributions, otherwise you'll copy two versions of the packages.
Commit the repo files to the svn next to the X.Y.Z release sources (refer to the last release for the structure of the
Add your signed armored GPG key to
reposdirectory to ease the key import for the users
Wait 24 Hours
It takes up to 24 hours for all the mirrors to sync, so don't announce the new release just yet.
Build and Deploy Site
Full version of this procedure is described and maintained in Deploying Bigtop's Apache Website
This will deploy the generated website to /www/bigtop.apache.org/ on people.apache.org. You can SSH there to check that things look OK.Once the deployment is done you need to publish new website via https://cms.apache.org/bigtop/: login and click "Publish bigtop site" link. Otherwise the content won't get propagated.
It will take an hour or so for the website to become live, but you can inspect the website by temporarily setting your browser proxy to see the new, unmirrored content (I used FoxyProxy in Firefox) as described in http://www.apache.org/dev/project-site.html.
11. Announce the Release
TODO: Add a news section to the website.
Send an email to firstname.lastname@example.org (the from: address must be @apache.org). E.g.
12. Add the Next Release to JIRA
Add the next version number (e.g. 0.2.0 after 0.1.0) to JIRA using this
In JIRA mark the released version as "released" on the "manage versions" page. Be sure to fill in a date if not already specified.