Bug 1771552

Summary:	oc debug node freezes on missing command executable
Product:	OpenShift Container Platform	Reporter:	Maciej Szulik <maszulik>
Component:	oc	Assignee:	Sally <somalley>
Status:	CLOSED ERRATA	QA Contact:	zhou ying <yinzhou>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	4.2.z	CC:	akostadi, aos-bugs, jokerman, mfojtik, somalley
Target Milestone:	---
Target Release:	4.4.0
Hardware:	Unspecified
OS:	Unspecified
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Last Closed:	2020-05-04 11:15:07 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Maciej Szulik 2019-11-12 15:26:03 UTC

Such command hangs:

$ oc debug node/node-name -- /bin/missing param1 param2

User does not see any feedback why command hangs. In fact pod fails to start due to missing executable. I suggest `oc` checks pod status and fails early in case pod fails to start for whatever reason. Also exit with proper error message to the user.

– Client Version: v4.2.0

Comment 3 zhou ying 2020-02-14 02:36:17 UTC

Confirmed with latest oc client, the issue has fixed:

[root@dhcp-140-138 ~]# oc version -o yaml 
clientVersion:
  buildDate: "2020-02-13T22:50:14Z"
  compiler: gc
  gitCommit: 5d7a12f03389b03b651f963cb5ee8ddfa9cff559
  gitTreeState: clean
  gitVersion: v4.4.0
  goVersion: go1.13.4
  major: ""
  minor: ""
  platform: linux/amd64


[root@dhcp-140-138 ~]# oc debug node/ip-xxxxxx  -- /bin/missing param1 param2
Starting pod/ip-xxxxxx-debug ...
To use host binaries, run `chroot /host`

Removing debug pod ...
error: container create failed: time="2020-02-14T02:34:39Z" level=error msg="container_linux.go:346: starting container process caused \"exec: \\\"/bin/missing\\\": stat /bin/missing: no such file or directory\""
container_linux.go:346: starting container process caused "exec: \"/bin/missing\": stat /bin/missing: no such file or directory"

Comment 5 errata-xmlrpc 2020-05-04 11:15:07 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/RHBA-2020:0581