Bug 1556782

Summary: [3.7] Mounting file in a subpath fails if file was created in initContainer
Product: OpenShift Container Platform Reporter: Jan Safranek <jsafrane>
Component: StorageAssignee: Jan Safranek <jsafrane>
Status: CLOSED ERRATA QA Contact: Qin Ping <piqin>
Severity: high Docs Contact:
Priority: unspecified    
Version: 3.7.0CC: aos-bugs, aos-storage-staff, hekumar, jsafrane, wehe, xtian
Target Milestone: ---   
Target Release: 3.7.z   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: 1555910 Environment:
Last Closed: 2018-04-29 14:36:36 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1555910    
Bug Blocks: 1555911    

Description Jan Safranek 2018-03-15 09:08:01 UTC 
+++ This bug was initially created as a clone of Bug #1555910 +++

Description of problem:

Originally reported bug : https://github.com/kubernetes/kubernetes/issues/61178

By creating a deployment where an init container creates a file in an emptydir and then the container tries to mount this file as a subpath will reproduce it.

---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: subpath
  namespace: kube-system
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: subpath
    spec:
      initContainers:
        - name: init
          image: busybox
          command:
            - touch
            - /mount/test
          volumeMounts:
            - name: mount
              mountPath: /mount
      containers:
      - name: subtest
        image: busybox
        command:
          - ls
          - -l
          - /mount/test
        volumeMounts:
          - name: mount
            mountPath: /mount/test
            subPath: test
      volumes:
      - name: mount
        emptyDir: {}



--- Additional comment from Hemant Kumar on 2018-03-14 16:05:08 EDT ---

https://github.com/openshift/ose/pull/1135
Comment 1 Jan Safranek 2018-03-15 09:22:39 UTC 
OSE PR: https://github.com/openshift/ose/pull/1113
Comment 3 Qin Ping 2018-04-17 07:32:37 UTC 
Verified in OCP v3.7.44
Comment 8 errata-xmlrpc 2018-04-29 14:36:36 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2018:1231