airshipctl/tools/airship-in-a-pod/scripts/13_apply_dns.sh
Michael Beaver 151eccbfba Add airship-in-a-pod to gate jobs
This change aims to add the airship-in-a-pod test to the gates.
This is accomplished by creating new scripts to run which
install a minimal k8s environment, and then apply the
airship-in-a-pod.yaml.

Brief description of scripts

01_dns_settings: Running k8s pods in zuul has a lot of issues with
DNS resolution which this resolves.

10_install_minikube: grabs latest minikube and other dependencies.

11_build_images: builds the images under tools/airship-in-a-pod
and then adds patches to the kustomize configuration to use and
configure them.

12_start_minikube: starts minikube and makes sure kubectl will work

13_apply_dns.sh: This takes some of the effort from 01_dns_settings
and incorporates it into the minikube cluster by modifying coredns

20_apply_aiap: Applies the airship-in-a-pod.yaml to the cluster.
Has a few loops to check that the cluster is fully running
before applying, and to check on the pod to see if it is ready
before finishing.

Closes: #478
Change-Id: I4c02d04b0eda9395642032bf56b56a0f823c1969
2021-07-23 10:14:14 -05:00

33 lines
1.4 KiB
Bash
Executable File

#!/usr/bin/env bash
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -ex
# This utilizes some of the work that was done to the nameservers in
# 01_dns_settings.sh to take those DNS servers and force the coredns pod
# of the minikube cluster to use those instead of the default.
# Grab a list of the nameservers IPs in /etc/resolv.conf
NAMESERVERS=$(grep nameserver /etc/resolv.conf | awk '{print $2}' | tr '\n' ' ')
kubectl -n kube-system get pods -o wide
# Configure coredns with an upstream DNS to ensure the pod can resolve
# domains outside of the cluster
kubectl -n kube-system get cm -o yaml coredns | sed "s/\/etc\/resolv\.conf/$NAMESERVERS/" > tools/airship-in-a-pod/coredns-upstream-dns.yaml
cat tools/airship-in-a-pod/coredns-upstream-dns.yaml
kubectl apply -f tools/airship-in-a-pod/coredns-upstream-dns.yaml
kubectl rollout restart -n kube-system deployment/coredns