[ https://issues.apache.org/jira/browse/YUNIKORN-2369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Craig Condit resolved YUNIKORN-2369. ------------------------------------ Fix Version/s: 1.5.0 Resolution: Fixed Merged to master. > Using unique generated Application IDs breaks scheduling > -------------------------------------------------------- > > Key: YUNIKORN-2369 > URL: https://issues.apache.org/jira/browse/YUNIKORN-2369 > Project: Apache YuniKorn > Issue Type: Bug > Components: shim - kubernetes > Reporter: Craig Condit > Assignee: Craig Condit > Priority: Critical > Labels: pull-request-available > Fix For: 1.5.0 > > > YUNIKORN-1273 added support to create unique application IDs instead of > grouping pods within a given namespace into a single application. However, > using this feature in combination with the YuniKorn admission controller > results in a failure to accept pods, as the pod UID (used in the generated > identifier) has not yet been created when admission controllers run. > For example, given a pod UID of *deadbeefcafe* running in namespace > {*}test{*}, the expected application ID is {*}test-deadbeefcafe{*}. However, > since the pod UID is not present when the admission controller runs, this > evaluates to `test-` and results in the pod being rejected by Kubernetes > since labels must contain only alphanumeric characters and "-", and must > start end end with alphanumeric characters. > One way to solve this would be to set the applicationId label in the > admission controller to something like *test-uniqueautogen* and then have the > scheduler interpret the presence of the *-uniqueautogen* suffix as a request > to use the pod UID as part of the name (since it will be available to the > scheduler). This satisfies the original design of YUNIKORN-1273, which was to > make the identifiers predictable (since they contain the pod UID), unique (as > they still are UUIDs) and consistent between restarts of the scheduler. A > drawback to this approach is that the applicationId label will not reflect > the real applicationId used. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@yunikorn.apache.org For additional commands, e-mail: dev-h...@yunikorn.apache.org