Bug 2016275
| Summary: | github.com can not be resolved inside pods where cluster is running on openstack. | ||
|---|---|---|---|
| Product: | OpenShift Container Platform | Reporter: | OpenShift BugZilla Robot <openshift-bugzilla-robot> |
| Component: | Networking | Assignee: | Miheer Salunke <misalunk> |
| Networking sub component: | DNS | QA Contact: | Shudi Li <shudili> |
| Status: | CLOSED ERRATA | Docs Contact: | |
| Severity: | high | ||
| Priority: | high | CC: | aos-bugs, dollierp, gouyang, hongli, misalunk, mjurc, mmasters, msimka, ppitonak, varadhya, xiuwang |
| Version: | 4.8 | Keywords: | Reopened |
| Target Milestone: | --- | ||
| Target Release: | 4.8.z | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-11-02 14:42:06 UTC | Type: | --- |
| 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: | 2009210 | ||
| Bug Blocks: | |||
|
Comment 1
Miciah Dashiel Butler Masters
2021-10-26 16:05:03 UTC
Verified it with 4.8.0-0.nightly-2021-10-27-154740 on IPI on OpenStack and passed.
1.
% oc get clusterversion
NAME VERSION AVAILABLE PROGRESSING SINCE STATUS
version 4.8.0-0.nightly-2021-10-27-154740 True False 13m Cluster version is 4.8.0-0.nightly-2021-10-27-154740
%
2.check bufsize in all the nodes, which is 512 as expected.
% oc debug node/shudi-48-os1-lqhd9-master-0
Starting pod/shudi-48-os1-lqhd9-master-0-debug ...
To use host binaries, run `chroot /host`
Pod IP: 192.168.3.172
If you don't see a command prompt, try pressing enter.
sh-4.4# chroot /host
sh-4.4# cat /etc/coredns/Corefile
. {
errors
bufsize 512
health :18080
forward . 10.11.142.1 {
policy sequential
}
cache 30
reload
...<-----snip----->
sh-4.4#
3. Can carry out dns query of github.com successfully in another pod
% oc rsh centos-pod
sh-4.4# dig github.com
; <<>> DiG 9.11.13-RedHat-9.11.13-6.el8_2.1 <<>> github.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8444
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
; COOKIE: 4a78c5694924aa22 (echoed)
;; QUESTION SECTION:
;github.com. IN A
;; ANSWER SECTION:
github.com. 30 IN A 140.82.114.3
;; Query time: 5 msec
;; SERVER: 172.30.0.10#53(172.30.0.10)
;; WHEN: Thu Oct 28 03:12:09 UTC 2021
;; MSG SIZE rcvd: 77
sh-4.4#
4. check the log from all dns pods under openshift-openstack-infra NS(Without carrying the dns query in the dns pod)
% oc -n openshift-openstack-infra logs coredns-shudi-48-os1-lqhd9-master-0 -c coredns
.:53
[INFO] plugin/reload: Running configuration MD5 = f5121b6db390e887b6cc8ced3a7db15e
CoreDNS-1.8.1
linux/amd64, go1.16.6,
[INFO] Reloading
[INFO] plugin/reload: Running configuration MD5 = f339170bf4c691c6b5b5bd274dfd1fa3
[INFO] Reloading complete
[INFO] Reloading
[INFO] plugin/reload: Running configuration MD5 = d6f2c2274e669f419008077e91778234
[INFO] Reloading complete
%
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 (OpenShift Container Platform 4.8.18 bug fix update), 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-2021:4020 |