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21 lines
695 B
Bash
Executable file
21 lines
695 B
Bash
Executable file
#!/bin/bash
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# Deploys CoreDNS to a cluster currently running Kube-DNS.
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SERVICE_CIDR=$1
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POD_CIDR=$2
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CLUSTER_DOMAIN=${3:-cluster.local}
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YAML_TEMPLATE=${4:-`pwd`/coredns.yaml.sed}
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if [[ -z $SERVICE_CIDR ]]; then
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echo "Usage: $0 SERVICE-CIDR [ POD-CIDR ] [ CLUSTER-DOMAIN ] [ YAML-TEMPLATE ]"
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exit 1
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fi
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CLUSTER_DNS_IP=$(kubectl get service --namespace kube-system kube-dns -o jsonpath="{.spec.clusterIP}")
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if [ $? -ne 0 ]; then
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>&2 echo "Error! The IP address for DNS service couldn't be determined by kubectl command"
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exit 2
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fi
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sed -e s/CLUSTER_DNS_IP/$CLUSTER_DNS_IP/g -e s/CLUSTER_DOMAIN/$CLUSTER_DOMAIN/g -e s?SERVICE_CIDR?$SERVICE_CIDR?g -e s?POD_CIDR?$POD_CIDR?g $YAML_TEMPLATE
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