RHUI で NFS ストレージを安全にアンマウントする手順
Issue
RHUA または CDS ノードで NFS ストレージ (/var/lib/rhui/remote_share) をアンマウントしようとすると、以下に示すように "device is busy" というエラーが発生して失敗します。
# umount -f /var/lib/rhui/remote_share
umount.nfs4: /var/lib/rhui/remote_share: device is busy
# fuser -muv /var/lib/rhui/remote_share
USER PID ACCESS COMMAND
/var/lib/rhui/remote_share:
root kernel mount (root)/var/lib/rhui/remote_share
pulp 1251 ..c.. (pulp)pulpcore-worker
pulp 1253 ..c.. (pulp)pulpcore-worker
pulp 1255 ..c.. (pulp)pulpcore-worker
pulp 1261 ..c.. (pulp)pulpcore-worker
pulp 1262 ..c.. (pulp)pulpcore-worker
pulp 1263 ..c.. (pulp)pulpcore-worker
pulp 1264 ..c.. (pulp)pulpcore-worker
pulp 1267 ..c.. (pulp)pulpcore-worker
pulp 2859 ..c.. (pulp)gunicorn
pulp 3330 ..c.. (pulp)gunicorn
Environment
Red Hat Update Infrastructure 4
Red Hat Update Infrastructure 5
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