Description of problem:
Builder/deployment pods are unable to resolve domains, e.g. source S2I builds
fail with the following message:

Could not resolve host: github.com

The issue does not seem to be occuring elsewhere than pods, for example,
importing images from remote registries functions.

The OCP4.6/4.7 clusters installed with same configuration do not have any issues
with resolving domain names.

OpenShift release version:
4.8.2, 4.8.3, 4.8.4

Cluster Platform:
IPI OpenStack, x86_64 VMs

How reproducible:
Always

Steps to Reproduce (in detail):
1. Install OCP 4.8 cluster on OpenStack with IPI
2. Once cluster is ready, import registry.access.redhat.com/ubi8/openjdk-11:latest

cat <<-EOF | ./oc apply -f -
apiVersion: image.openshift.io/v1
kind: ImageStream
metadata:
  name: openjdk-11
spec:
  lookupPolicy:
    local: false
  tags:
    - name: latest
      from:
        kind: DockerImage
        name: registry.access.redhat.com/ubi8/openjdk-11:latest


3. Create source S2I build with the created imagestream:

oc new-app openjdk-11 https://github.com/quarkusio/quarkus-quickstarts.git\#1.11 --context-dir=getting-started --name=getting-started


Actual results:
Build fails as git in build pod is unable to resolve github.com

Expected results:
Build succeeds

Additional info:

install-config.yaml

apiVersion: v1
baseDomain: ${QUARKUS_QE_DOMAIN}
metadata:
  name: ${OPENSHIFT_CLUSTER_NAME}
controlPlane:
  name: master
  platform: {}
  replicas: 3
compute:
- name: worker
  platform:
    openstack:
      type: ${OPENSTACK_FLAVOR_COMPUTE}
  replicas: 3
networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineCIDR: 172.208.0.0/16
  networkType: OpenShiftSDN
  serviceNetwork:
  - 172.30.0.0/16
platform:
  openstack:
    cloud: openstack
    computeFlavor: ${OPENSTACK_FLAVOR_CONTROL_PLANE}
    externalDNS: null
    externalNetwork: ${OPENSTACK_NETWORK}
    lbFloatingIP: ${OPENSTACK_FLOATING_IP_API}
    octaviaSupport: "0"
    region: "regionOne"
    trunkSupport: "1"
publish: External
pullSecret: '$(cat ${OPENSHIFT_PULL_SECRET})'
sshKey: '$(cat ${OPENSHIFT_SSH_KEY})'

=========================


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