Issue
- How to configure the upstream source of my custom update center(s)?
- I have several version of Jenkins in my CJP cluster, how to manage my update centers?
Environment
- CloudBees Jenkins Operations Center
- Operations Center Update Center Plugin
- CloudBees Update Center Plugin
Resolution
The CloudBees Update Center Plugin provides the ability to host and manage your own Update Center(s). In order to best manage your update center, you need to ensure that you track the correct upstream source:
Version Configuration
In the Upstream Source configuration, you can specify the Jenkins version to track.
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If you leave the version blank then the version of the Jenkins instance that is hosting Custom Update Center is used by default.
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If you leave the version with a two segment version number, e.g. 1.642, then the core updates will be the OSS HEAD line
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If you leave the version with a three segment version number, e.g. 1.642.1, then the core updates will be the OSS LTS line and plugin updates will be restricted to those declaring a core dependency that is not greater than the current OSS LTS line.
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If you leave the version with a four segment version number, e.g. 1.642.1.1, then the core version will be the CJE version and plugin updates will be restricted to those declaring a core dependency that is not greater than this CJE version.
Note: If you are running CJE, in most cases you want to define a specific version
Multiple controllers / Different Versions
In the case where you have a CJP cluster with Client controllers running different version, what you want to have is an update center for each CJE version line that you have client controllers in. The version you specify should be the lowest version in that line.
So if you have any CJE 15.11 client controllers, that is the 1.625.. line, so their update center should be pulling with the version specified as 1.625.1.1 even though the CJE controllers are running a mix of say 1.625.2.2 or 1.625.3.1.
How it Works
When Jenkins requests the update center data from the update center, the request is made with a query parameter added to the update center URL. That query parameter will be ?version=... where the ... is the version of Jenkins.
The CloudBees Update Center Plugin uses this to route each Jenkins version line to the correct update center data. You can see this using CURL:
$ curl -I -L http://jenkins-updates.cloudbees.com/update-center.json?version=1.609.1.1
HTTP/1.1 302 Found
Content-Length: 0
Date: Tue, 12 Jul 2016 08:37:49 GMT
Last-Modified: Mon, 11 Jul 2016 21:00:11 GMT
Location: /updateCenter/fgr6EFfA/update-center.json
Server: Apache-Coyote/1.1
Connection: keep-alive
HTTP/1.1 200 OK
Content-Length: 912824
Content-Type: application/javascript;charset=UTF-8
Date: Tue, 12 Jul 2016 08:37:49 GMT
Last-Modified: Mon, 11 Jul 2016 21:00:11 GMT
Server: Apache-Coyote/1.1
Connection: keep-alive
This allows us to filter the plugins that a specific Jenkins line will see such that only the versions that are compatible with that line are available.
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