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app-admin/kubelet-wrapper: mark kubelet datadir volume as a recursive mount

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So far `/var/lib/kubelet` was mounted as an implicit non-recursive mount.
This changes the wrapper to an explicit recursive mount.

As shown in https://github.com/kubernetes/kubernetes/issues/38498#issuecomment-282493681,
current non-recursive behavior seems to confuse the kubelet which
is incapable of cleaning up resources for orphaned pods, as the
extisting mountpoints for them are not available inside kubelet
chroot.
With `recursive=true`, those mounts are made available in the
chroot and can be unmounted on the host-side from kubelet chroot
via shared back-propagation.

Fixes https://github.com/coreos/bugs/issues/1831
This commit is contained in:
Luca Bruno 2017-04-05 08:38:51 +00:00
parent 8eb77d504c
commit 51650980eb
1 changed files with 1 additions and 1 deletions
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sdk_container/src/third_party/coreos-overlay/app-admin/kubelet-wrapper/files/kubelet-wrapper vendored
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@ -66,7 +66,7 @@ exec ${RKT} ${RKT_GLOBAL_ARGS} \
--volume etc-ssl-certs,kind=host,source=/etc/ssl/certs,readOnly=true \
--volume usr-share-certs,kind=host,source=/usr/share/ca-certificates,readOnly=true \
--volume var-lib-docker,kind=host,source=/var/lib/docker,readOnly=false \
--volume var-lib-kubelet,kind=host,source=/var/lib/kubelet,readOnly=false \
--volume var-lib-kubelet,kind=host,source=/var/lib/kubelet,readOnly=false,recursive=true \
--volume var-log,kind=host,source=/var/log,readOnly=false \
--volume os-release,kind=host,source=/usr/lib/os-release,readOnly=true \
--volume run,kind=host,source=/run,readOnly=false \