start-k3d.sh
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#!/bin/bash
set -xe
APP_DIR=""
BUILD_NAME=""
while [[ $# -gt 0 ]]; do
case "$1" in
(--app-dir)
APP_DIR="$2"
shift 2
;;
(--build-name)
BUILD_NAME="$2"
shift 2
;;
(*)
break
esac
done
if [[ -f $APP_DIR/.k3d.env ]]; then
. $APP_DIR/.k3d.env
fi
[[ $APP_DIR ]] || { echo "Please pass --app-dir!" 1>&2; exit 1; }
[[ $BUILD_NAME ]] || { echo "Please configure --build-name!" 1>&2; exit 1; }
[[ -f $APP_DIR/k3d.conf ]] || { echo "No k3d.conf found in $APP_DIR!" 1>&2; exit 1; }
if ! k3d cluster list "${BUILD_NAME}" 1>/dev/null 2>/dev/null; then
k3d cluster create -c "$APP_DIR/k3d.conf" "${BUILD_NAME}"
fi
k3d kubeconfig merge "${BUILD_NAME}" --kubeconfig-merge-default --kubeconfig-switch-context
generate_coredns_custom() {
search_domains="$(sed -n -e 's/^search //p' /etc/resolv.conf | tr ' ' '\n' | sed -e 's/\.$//')"
nameserver_address="$(sed -n -e 's/^nameserver *//p' /etc/resolv.conf | head -n 1)"
cat << _EOF_
apiVersion: v1
kind: ConfigMap
metadata:
name: coredns-custom
namespace: kube-system
data:
_EOF_
for search_domain in $search_domains; do
cat << _EOF_
${search_domain}.server: |
${search_domain}{
forward . ${nameserver_address}
}
_EOF_
done
}
generate_coredns_custom | kubectl apply -f -
kubectl rollout restart deployment -n kube-system coredns