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Bug 2124416

Summary: aardvark-dns: Recursion Available bit is not set in response header
Product: Red Hat Enterprise Linux 8 Reporter: Sameer <snangare>
Component: podmanAssignee: Jindrich Novy <jnovy>
Status: CLOSED ERRATA QA Contact: Joy Pu <ypu>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 8.6CC: bbaude, dornelas, dwalsh, jligon, jnovy, lsm5, mheon, pthomas, tsweeney, umohnani, ypu
Target Milestone: rcKeywords: Triaged
Target Release: ---Flags: pm-rhel: mirror+
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: aardvark-dns-1.4.0-1.el8 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2023-05-16 08:20:37 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:

Description Sameer 2022-09-06 05:27:03 UTC 
Description of problem:

- The issue is observed on `aardvark-dns` package version 1.0.1-35, that Recursion Available bit is not set in response header.

Version-Release number of selected component (if applicable):

- aardvark-dns-1.0.1-35

How reproducible:

 - Mostly

Steps to Reproduce:

1. # Configuration
## Dual stack network
{
  "name": "dual",
  "id": "2697203bf4180da9e7a6d074e38cbafb2fad4c8a3436522bde4ac573c059caa6",
  "driver": "bridge",
  "network_interface": "podman1",
  "created": "2022-08-24T04:03:37.236675178-05:00",
  "subnets": [
    {
      "subnet": "192.168.227.0/24",
      "gateway": "192.168.227.1"
    },
    {
      "subnet": "fdf8:192:168:227::/120",
      "gateway": "fdf8:192:168:227::1"
    }
  ],
  "ipv6_enabled": true,
  "internal": false,
  "dns_enabled": true,
  "ipam_options": {
    "driver": "host-local"
  }
}



2. ## Two containers, foo and bar, resolving bar from foo
[root@foo /]# cat /etc/resolv.conf
search dns.podman
nameserver 192.168.227.1
nameserver fdf8:192:168:227::1

# Issue observed
## nslookup complains "Got recursion not available from 192.168.227.1, trying next server"
[root@foo /]# nslookup bar
;; Got recursion not available from 192.168.227.1, trying next server
;; connection timed out; no servers could be reached

[root@foo /]#


3. ## dig also complains "WARNING: recursion requested but not available"
[root@foo /]# dig bar

; <<>> DiG 9.11.36-RedHat-9.11.36-3.el8 <<>> bar
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13400
;; flags: qr rd ad; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: b8dbf9748e7ba467 (echoed)
;; QUESTION SECTION:
;bar.				IN	A

;; ANSWER SECTION:
bar.			86400	IN	A	192.168.227.9
bar.			86400	IN	AAAA	fdf8:192:168:227::9
bar.			86400	IN	A	192.168.227.9
bar.			86400	IN	AAAA	fdf8:192:168:227::9

;; Query time: 0 msec
;; SERVER: 192.168.227.1#53(192.168.227.1)
;; WHEN: Fri Aug 26 10:23:45 UTC 2022
;; MSG SIZE  rcvd: 132

[root@foo /]#

Actual results:
 
## nslookup complains "Got recursion not available from 192.168.227.1, trying next server"
[root@foo /]# nslookup bar
;; Got recursion not available from 192.168.227.1, trying next server
  - 
Expected results:

  - nslookup should prompt an output without any complains 

Additional info:

  - Link to original issue - https://github.com/containers/aardvark-dns/issues/204.
 This is being worked upon and it's almost fixed there.
Comment 5 Joy Pu 2023-01-30 10:18:28 UTC 
Can reproduce with aardvark-dns-1.0.1-35.module+el8.6.0+15917+093ca6f8.x86_64 with dig. The WARNING message is there:
# podman exec  foo dig bar

; <<>> DiG 9.11.36-RedHat-9.11.36-5.el8_7.2 <<>> bar
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54510
;; flags: qr rd ad; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: 047712cd672895f9 (echoed)
;; QUESTION SECTION:
;bar.				IN	A

;; ANSWER SECTION:
bar.			86400	IN	A	10.89.0.10
bar.			86400	IN	AAAA	fda7:1969:afb3:f334::8
bar.			86400	IN	A	10.89.0.10
bar.			86400	IN	AAAA	fda7:1969:afb3:f334::8

;; Query time: 1 msec
;; SERVER: 10.89.0.1#53(10.89.0.1)
;; WHEN: Mon Jan 30 10:15:43 UTC 2023
;; MSG SIZE  rcvd: 132


And test with aardvark-dns-1.4.0-1.module+el8.8.0+17823+c4e3c815.x86_64
# podman exec foo dig bar

; <<>> DiG 9.11.36-RedHat-9.11.36-5.el8_7.2 <<>> bar
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6342
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: 526514d091d3cbff (echoed)
;; QUESTION SECTION:
;bar.				IN	A

;; ANSWER SECTION:
bar.			86400	IN	A	10.89.0.6

;; Query time: 0 msec
;; SERVER: 10.89.0.1#53(10.89.0.1)
;; WHEN: Mon Jan 30 10:15:25 UTC 2023
;; MSG SIZE  rcvd: 60


So add Tested flag
Comment 8 Joy Pu 2023-02-13 07:41:49 UTC 
Checked with aardvark-dns-1.5.0-2.module+el8.8.0+18060+3f21f2cc.x86_64, the AAAA lines is not shows up again. So move it to verified. More details:
# podman exec foo dig bar

; <<>> DiG 9.11.36-RedHat-9.11.36-5.el8_7.2 <<>> bar
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27316
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: 16de3ff688875c7d (echoed)
;; QUESTION SECTION:
;bar.				IN	A

;; ANSWER SECTION:
bar.			86400	IN	A	10.89.2.2

;; Query time: 1 msec
;; SERVER: 10.89.2.1#53(10.89.2.1)
;; WHEN: Mon Feb 13 07:39:58 UTC 2023
;; MSG SIZE  rcvd: 60
Comment 10 errata-xmlrpc 2023-05-16 08:20:37 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 (Moderate: container-tools:rhel8 security, bug fix, and enhancement 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/RHSA-2023:2758