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UPDATING-FRAMEWORKS.md

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Updating a framework which uses the DC/OS Commons SDK

Any framework built using the DC/OS Commons SDK should be updated regularly in order to make use of new features in the SDK or consume bugfixes.

The parts of the SDK consumed consist of:

  • The SDK Java libraries including:
    • scheduler libraries
    • testing libraries
  • SDK artifacts including:
    • The bootstrap utility
  • CLI binaries for the three supported platforms
  • Build tooling
  • Testing utilities

This file describes the procedure for updating such framework to use the current SDK version.

Preparation

If the framework repository has never been updated in the way described below, then the following changes may be required:

Check build.gradle

Check that build.gradle in the project root contains the following dependencies in addition to any others required:

dependencies {
    compile "mesosphere:scheduler:${dcosSDKVer}"
    testCompile "mesosphere:testing:${dcosSDKVer}"
}

as well as the following entry in the ext specification:

ext {
    dcosSDKVer = "<CURRENT_SDK_VERSION>"
}

(where <CURRENT_SDK_VERSION> represents a version string such as 0.30.1)

Older versions of build.gradle contained the following dependencies and no entry in the ext specification:

  • compile "mesosphere:scheduler:<CURRENT_SDK_VERSION>"
  • testCompile "mesosphere:testing:<CURRENT_SDK_VERSION>"

Although this is supported in the current upgrade path, it is recommended that these are changed to match the dependencies at the start of this section as this will result in a single line diff in the build.gradle file on update.

Check the universe/resource.json file

URIs

In order to facilitate upgrades, the universe/resource.json file should contain the following entries in the "uris" section:

"uris": {
    "...": "...",
    "bootstrap-zip": "https://downloads.mesosphere.com/dcos-commons/artifacts/{{dcos-sdk-version}}/bootstrap.zip",
    "...": "..."
}

Note the use of the {{dcos-sdk-version}} mustache template to replace an explicit version specification.

CLIs

In addition, if no custom CLI command are required, the "cli" section in the universe/resource.json can be replaced by:

"cli":{
    "binaries":{
      "darwin":{
        "x86-64":{
          "contentHash":[ { "algo":"sha256", "value":"{{sha256:dcos-service-cli-darwin@https://downloads.mesosphere.com/dcos-commons/artifacts/{{dcos-sdk-version}}/SHA256SUMS}}" } ],
          "kind":"executable",
          "url":"https://downloads.mesosphere.com/dcos-commons/artifacts/{{dcos-sdk-version}}/dcos-service-cli-darwin"
        }
      },
      "linux":{
        "x86-64":{
          "contentHash":[ { "algo":"sha256", "value":"{{sha256:dcos-service-cli-linux@https://downloads.mesosphere.com/dcos-commons/artifacts/{{dcos-sdk-version}}/SHA256SUMS}}" } ],
          "kind":"executable",
          "url":"https://downloads.mesosphere.com/dcos-commons/artifacts/{{dcos-sdk-version}}/dcos-service-cli-linux"
        }
      },
      "windows":{
        "x86-64":{
          "contentHash":[ { "algo":"sha256", "value":"{{sha256:dcos-service-cli.exe@https://downloads.mesosphere.com/dcos-commons/artifacts/{{dcos-sdk-version}}/SHA256SUMS}}" } ],
          "kind":"executable",
          "url":"https://downloads.mesosphere.com/dcos-commons/artifacts/{{dcos-sdk-version}}/dcos-service-cli.exe"
        }
      }
    }
  }

Meaning that the CLIs for the templated {{dcos-sdk-version}} are used directly instead of building these separately.

Updating

Clean the current working directory

It is recommended that the update be performed in a clean git repository. Running the following commands should ensure this:

NOTE: This is a destructive operation

$ git checkout -b update-sdk-version-to-<NEW_SDK_VERSION>
$ git reset --hard HEAD
$ git clean -fdx

Now running `git status should yield:

$ git status
On branch update-sdk-version-to-<NEW_SDK_VERSION>
nothing to commit, working tree clean

Perform the update

Assuming the build.gradle and resource.json files have been updated accordingly, the update to a specific version of the SDK can be performed as follows:

$ docker pull mesosphere/dcos-commons:latest
$ docker run --rm -ti -v $(pwd):$(pwd) mesosphere/dcos-commons:latest copy-files $(pwd) --update-sdk <NEW_SDK_VERSION>

Running a git status after this process should show something like:

$ git status
On branch update-sdk-version-to-0.41.0
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

	modified:   TESTING.md
	modified:   UPDATING.md
	modified:   conftest.py
	modified:   test.sh
	modified:   testing/README.md
	[...]
	modified:   tools/validate_pip_freeze.py

no changes added to commit (use "git add" and/or "git commit -a")

Note that the update procedure could also delete unneeded files.

Check the differences in build.gradle and tools/release_builder.py to ensure that the <NEW_SDK_VERSION> is present in both files.

Now add the changes to version control using the required git commands (git add, git rm).

Further steps

  • See the SDK release notes and change log for any changes required when consuming the SDK.
  • If the build process is heavily customized, it may be that additional changes will be required to the build.sh file in the repo.
  • The API of the testing tools in testing could have changed, and any integration tests may need to be updated. Run git diff testing to check for any relevant changes.