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https://issues.apache.org/jira/browse/FELIX-6229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on FELIX-6229 started by Raymond Augé.
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> Not compatible with the symlinks Kubernetes uses to mount ConfigMaps
> --------------------------------------------------------------------
>
> Key: FELIX-6229
> URL: https://issues.apache.org/jira/browse/FELIX-6229
> Project: Felix
> Issue Type: Bug
> Components: File Install
> Affects Versions: fileinstall-3.6.4
> Environment: linux
> Reporter: Lars Benedetto
> Assignee: Raymond Augé
> Priority: Major
> Fix For: fileinstall-3.7.0
>
>
> I am trying to deploy xml blueprint files in Karaf by using Kubernetes to
> mount a ConfigMap as a file inside Karafs deploy folder. Unfortunately, K8s
> doesn't just put the file in the deploy folder.
>
> {code:java}
> root@/apache-karaf/deploy# ls -al
> total 0
> drwxrwxrwx 3 root root 151 Feb 26 04:20 .
> drwxr-xr-x 1 root root 64 Feb 25 05:49 ..
> drwxr-xr-x 2 root root 98 Feb 26 04:20 ..2020_02_26_04_20_14.044787912
> lrwxrwxrwx 1 root root 31 Feb 26 04:20 ..data ->
> ..2020_02_26_04_20_14.044787912
> lrwxrwxrwx 1 root root 45 Feb 26 04:13 route.xml -> ..data/route.xml{code}
> K8s creates a chain of symlinks. This works at first, because Felix detects
> the creation of the symlink from route.xml -> data/route.xml, and follows the
> symlinks through to get to the actual file.
> But when K8s comes in to update with a new version of the route, it creates a
> new timestamped directory, and then updates the intermediate symlink from
> data -> timestamp.
>
> Felix detects this as well, but only partially. It deploys the new timestamp
> dir with {{wrap:jardir:}} and the new symlink to the timestamp dir as
> {{wrap:jardir:}} as well. But it does not reload the route.
>
> Steps to reproduce:
> In this variant, intermediate and final are detected and deployed as
> \{{wrap:jardir: }}and the route is detected and deployed correctly, but
> subsequent changes to the route are not.
>
> {code:java}
> mkdir final1
> cp /routev1.xml /apache-karaf/deploy/final1/route.xml
> ln -s final1 intermediate
> ln -s intermediate/route.xml route.xml
> # And then to mimic k8s switching to the new file
> mkdir final2
> cp /routev2.xml /apache-karaf/deploy/final2/route.xml
> rm intermediate
> ln -s final2 intermediate
> {code}
> In this variant, the route is never detected. But intermediate and final are
> both detected and deployed as {{wrap:jardir:}}
>
> {code:java}
> mkdir final1
> cp /routev1.xml /apache-karaf/deploy/final1/route.xml
> ln -s intermediate/route.xml route.xml
> ln -s final1 intermediate{code}
>
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