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Information/Recipes for Curator Committers

Tools/Preparation

Development

Releasing Curator

Tools

Curator is built using Maven and Git. You should be familiar with both of these tools. For publishing, you also need to install GPG and create a key that is available from a well known public site.

GPG

Download GPG from http://www.gnupg.org/download/.

  1. Generate PGP code signing keys
  2. Ensure that your PGP signing keys are available in the KEYS file that is in the release directory (see SVN Setup).

If you are not already a member of the Web Of Trust (WOT) it would be a good idea to do so. 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).

Maven Settings

Your Maven settings (~/.m2/settings.xml) file should have the following (note: curator-website-checkout-path is used as a temporary path when deploying the Curator website):

<settings>
    ...
    <servers>
        ...
        <server>
            <id>apache.website.svnpub</id>
            <username>Your Apache Username</username>
            <privateKey>${user.home}/.ssh/id_rsa</privateKey>
        </server>
        ...
    </servers>

    <profiles>
        <profile>
            <properties>
                ...
                <curator-website-checkout-path>path-goes-here</curator-website-checkout-path>
    	        <gpg.keyname>id-of-your-pgp-key</gpg.keyname>
                ...
            </properties>
            ...
        </profile>
        ...
    </profiles>
    ...
</settings>

Note: you can store encrypted passwords your settings.xml if you want. Read the details here: http://maven.apache.org/guides/mini/guide-encryption.html

Git Setup

Apache has a good guide on how to prepare your environment for interacting with the Curator Git repo: https://git-wip-us.apache.org/.

SVN Setup

While Curator mainly uses git for source control, certain components required by Apache use SVN. You should checkout the following SVN projects into unique local directories:

Development

GitHub Flow

Curator loosely uses GitHub Flow. The short form:

  • Anything in the master branch is deployable
  • The upcoming release is always "master"
  • To work on something new, create a descriptively named branch off of the upcoming release - usually the ID of the Jira issue (e.g. CURATOR-16)
    • Commit to that branch locally and regularly push your work to the same named branch on the server
    • When you need feedback or help or you think the branch is ready for merging, send an email on dev@curator.incubator.org and ask for the branch to be reviewed
    • After someone else has reviewed and signed off on the feature, merge it into "master"

Jenkins

A Jenkins job has been created:

Jira

For all but minor changes, there should be a Jira "ticket" created at https://issues.apache.org/jira/browse/CURATOR.

Maven Checks

Regardless of which IDE you use, you should periodically perform a mvn clean install to validate that the various configured checks (such as license headers, etc.) are passing as well as the unit tests.

Releasing Curator

To release Curator, the following steps must be followed:

  1. The binary artifacts must be staged
  2. The Apache release must be staged
  3. The release must be voted on
  4. If the vote succeeds:
    • The Apache release must be promoted
    • The binary artifacts must be released

Prepare the Release

  1. Do a dry run of the release/prepare step by executing mvn -P apache-release release:prepare -DdryRun=true. The dry run will not commit any changes back to Git and gives you the opportunity to verify that the release process will complete as expected. If you need to cancel, execute mvn release:clean and then reset via git reset --hard.
  2. Verify that the release process completed as expected:
    • The release plugin will create pom.xml.tag files which contain the changes that would have been committed to SVN. The only differences between pom.xml.tag and its corresponding pom.xml file should be the version number.
    • If other formatting changes have been made you should review the changes and then commit and push them.
    • Once any failures or required updates have been committed to svn, rollback the release prepare files: mvn release:rollback
  3. Execute the release/prepare step for real this time
    • You'll be prompted for the same version information and optionally your GPG
      passphrase again
    • mvn -P apache-release release:prepare
    • mvn -P apache-release release:perform
  4. Verify the staged artifacts in the Apache Nexus repository:
  5. Close the Nexus staging repo by clicking on the curator repo and clicking the "Close" button.
  6. IMPORTANT: Do NOT release the binaries yet

Stage the Apache Release

  1. Create the stageable source artifacts
    • Checkout the release: git checkout apache-curator-X.X.X-incubating
    • mvn -P apache-release clean install
    • git checkout master
  2. Locate the artifacts in your local Maven repository. On Mac/*nix this will be ~/.m2/repository/org/apache/curator/apache-curator/.... The remainder of the directory will be the version being released. In the directory you will find 4 files that need to be staged:
    • apache-curator-X.X.X-incubating-source-release.zip
    • apache-curator-X.X.X-incubating-source-release.zip.asc
    • apache-curator-X.X.X-incubating-source-release.zip.md5
    • apache-curator-X.X.X-incubating-source-release.zip.sha1
  3. These files must be put into the staging directory (svn co https://dist.apache.org/repos/dist/dev/incubator/curator/)
    • Create a directory for the release
    • cp the files to this directory and then svn commit

Initiate a Vote On the Release

  1. Create a pre-VOTE email thread on dev@curator.incubator.apache.org to record votes as replies (see Example Emails).
    • This vote is to get a sense of the Curator PMC members
    • The release needs 3 +1 votes from the PMC
    • If this pre-VOTE succeeds, continue to the next step
    • Regardless of the vote result, send a RESULT VOTE email (see Example Emails).
  2. Create a VOTE email thread on @general to record votes as replies (see Example Emails).
  3. If the Vote succeeds, you can promote the release
  4. Regardless of the vote result, send a RESULT VOTE email (see Example Emails).

Promote the Release

  1. These files must be put into the release directory (svn co https://dist.apache.org/repos/dist/release/incubator/curator/)
    • Create a directory for the release
    • cp the files to this directory and then svn commit
  2. Release the binary artifacts
  3. Announce the release on the @general list (see Example Emails).
  4. Create a new git branch for the next release, delete the tag "next-release" and point that "next-release" tag at the new release branch.

How to Publish the Curator Website

Assuming you have a clean compile/install of Curator, from the root of the Curator directory:

mvn site site:stage

Have a look at the staged site and make sure it's good. Then:

mvn site-deploy

You'll need to make sure you've authenticated to the Apache Subversion server before you can push the site, else you may get an error along the lines of authorization failed: Could not authenticate to server: rejected Basic challenge. More reading material on how to secure your SVN credentials can be found here.

Also note if you get an error complaining that Server certificate verification failed: issuer is not trusted, you can add the repo certificate to the list of certificates accepted to your local svn client by simply listing the repository and accepting the cert permanently.

svn list https://svn.apache.org/repos/asf/incubator/curator/site/trunk

Error validating server certificate for 'https://svn.apache.org:443':
 - The certificate is not issued by a trusted authority. Use the
   fingerprint to validate the certificate manually!
Certificate information:
 - Hostname: *.apache.org
 - Valid: from Tue, 20 Dec 2011 00:00:00 GMT until Mon, 17 Feb 2014 23:59:59 GMT
 - Issuer: Thawte, Inc., US
 - Fingerprint: bc:5f:40:92:fd:6a:49:aa:f8:b8:35:0d:ed:27:5e:a6:64:c1:7a:1b
(R)eject, accept (t)emporarily or accept (p)ermanently? p
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