Release Guide

This guide describes the process of doing an official release of Mesos.

Prerequisites

Ensure that you have a GPG key or generate a new one, e.g., using gpg --gen-key.
Add your GPG public key to the Apache Mesos dist repository in the KEYS file.
Fetch the svn repository svn co https://dist.apache.org/repos/dist/release/mesos
Append your public key using one of methods described in KEYS, e.g., (gpg --list-sigs <your name> && gpg --armor --export <your name>) >> KEYS.
Push the commit: svn ci
Submit your GPG public key to a keyserver, e.g., MIT PGP Public Key Server.
Add your GPG fingerprint to your Apache account.

Create a Maven settings file (~/.m2/settings.xml) for the Apache servers where you must copy your encrypted Apache password which you can get from running mvn --encrypt-password (NOTE: you may need to first generate a master password.

<settings>
  <servers>
    <server>
      <id>apache.snapshots.https</id>
      <username>APACHE USERNAME</username>
      <password>APACHE ENCRYPTED PASSWORD</password>
    </server>
    <server>
      <id>apache.releases.https</id>
      <username>APACHE USERNAME</username>
      <password>APACHE ENCRYPTED PASSWORD</password>
    </server>
  </servers>
</settings>

Use gpg-agent to avoid typing your passphrase repeatedly.

Preparation

Go to Apache Jira and make sure that the CHANGELOG for the release version is up to date.

NOTE: You should move all Unresolved tickets marked with Fix Version as the release version to the next release version.

PROTIP: Use bulk edit option in JIRA to move the tickets and make sure to uncheck the option that emails everyone about the move.
Update and commit the CHANGELOG for the release.

NOTE: You should use JIRA to generate the CHANGELOG for you. Click on the release version in JIRA and click on the Release Notes. Make sure to configure the release notes in text format.
If not already done, update and commit configure.ac for the release.
Update and commit docs/configuration.md to reflect the current state of the master, slave, and configure flags.
Update and commit docs/upgrades.md with instructions about how to upgrade a live cluster from the previous release version to this release version.
If this is a major release please write and commit documentation for this feature.

Tagging the release candidate

Ensure that you can build and pass all the tests.
```
$ make -j3 distcheck
```
First tag the required SHA locally.
```
$ git tag <X.Y.Z-rcR>
```
NOTE: X.Y.Z is based on semantic versioning scheme. R is release candidate version that starts with 1.
Tag the release externally and deploy the corresponding JAR to the Apache maven repository. It is recommended to use the support/tag.sh script to accomplish this.
```
$ ./support/tag.sh X.Y.Z R
```
NOTE: This script assumes that you have the requisite permissions to deploy the JAR. For instructions on how to set it up, please refer to src/java/MESOS-MAVEN-README.
It is not uncommon to release multiple release candidates, with increasing release candidate version, if there are bugs found.
Update to the next Mesos version in configure.ac: change AC_INIT([mesos], [X.Y.Z])) and commit.

Voting the release candidate

Once a release candidate is deemed worthy to be officially released you should call a vote on the [email protected] (and optionally [email protected]) mailing list.
It is recommended to use the support/vote.sh script to vote the release candidate.
```
$ ./support/vote.sh X.Y.Z R
```
The release script also spits out an email template that you could use to send the vote email.

Releasing the release candidate

You should only release an official version if the vote passes with at least 3 +1 binding votes and no -1 votes. For more information, please refer to Apache release guidelines.
It is recommended to use support/release.sh script to release the candidate.
```
$ ./support/release.sh X.Y.Z R
```
The release script also spits out an email template that you could use to notify the mailing lists about the result of the vote and the release.

NOTE: Make sure you fill the email template with the names of binding voters.

Updating the website

After a successful release please update the website pointing to the new release.
It is also recommended to write a blog post announcing the feature.

Remove old releases from svn

Per the guidelines when to archive, we should only keep the latest release in each version under development.

Checkout the mesos distribution folder: svn co https://dist.apache.org/repos/dist/release/mesos
Remove all minor versions that are no longer under development and commit the change.

Set the release date

Find the released Mesos version on https://issues.apache.org/jira/plugins/servlet/project-config/MESOS/versions, and update the release date.

Update external tooling

Update the Mesos Homebrew package.
Update the Homebrew formula for Mesos and test.
Submit a PR to the Homebrew repo.
Once accepted, verify that brew install mesos works.