add_node.sh

#!/bin/bash
# Author: pblaas (patrick@kite4fun.nl)
# Initial version 04-2017

# This script is used to generate Kubernetes cloud-init files for CoreoS.

if [ ! -f config.env ]; then
	echo config.env not found.
        echo cp config.env.sample to config.env to get started.
	exit 1
fi
. config.env

if [ ! $1 ]; then
	echo You need to provide one or more ip adresses.
	echo e.g $0 192.168.10.12
	exit 1
fi

cd set

CUSTOMSALT=$(openssl rand -base64 12)
HASHED_USER_CORE_PASSWORD=$(perl -le "print crypt '$USER_CORE_PASSWORD', '\$6\$$CUSTOMSALT' ")

#create worker certs
for i in $1; do
openssl genrsa -out ${i}-worker-key.pem 2048
if [ "$CLOUD_PROVIDER" == "openstack" ]; then
	CERTID=k8s-${CLUSTERNAME}-node${i##*.}
else
	CERTID=${i}
fi
WORKER_IP=${i} openssl req -new -key ${i}-worker-key.pem -out ${i}-worker.csr -subj "/CN=system:node:${CERTID}/O=system:nodes" -config ../template/worker-openssl.cnf
WORKER_IP=${i} openssl x509 -req -in ${i}-worker.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out ${i}-worker.pem -days 365 -extensions v3_req -extfile ../template/worker-openssl.cnf
done

for i in $1; do
openssl genrsa -out ${i}-etcd-worker-key.pem 2048
WORKER_IP=${i} openssl req -new -key ${i}-etcd-worker-key.pem -out ${i}-etcd-worker.csr -subj "/CN=${i}" -config ../template/worker-openssl.cnf
WORKER_IP=${i} openssl x509 -req -in ${i}-etcd-worker.csr -CA etcd-ca.pem -CAkey etcd-ca-key.pem -CAcreateserial -out ${i}-etcd-worker.pem -days 365 -extensions v3_req -extfile ../template/worker-openssl.cnf
done


#gzip base64 encode files to store in the cloud init files.
CAKEY=$(cat ca-key.pem | gzip | base64 -w0)
CACERT=$(cat ca.pem | gzip | base64 -w0)
APISERVERKEY=$(cat apiserver-key.pem | gzip | base64 -w0)
APISERVER=$(cat apiserver.pem | gzip | base64 -w0)

for i in $1; do
	j=$i-worker-key.pem
	k=$i-worker.pem
	l=$i-etcd-worker-key.pem
	m=$i-etcd-worker.pem
	WORKERKEY=$(cat $j | gzip | base64 -w0)
	WORKER=$(cat $k | gzip | base64 -w0)
	ETCDWORKERKEY=$(cat $l | gzip | base64 -w0)
	ETCDWORKER=$(cat $m | gzip | base64 -w0)
	echo WORKERKEY_$i:$WORKERKEY >> index.txt
	echo WORKER_$i:$WORKER >> index.txt
	echo ETCDWORKERKEY_$i:$ETCDWORKERKEY >> index.txt
	echo ETCDWORKER_$i:$ETCDWORKER >> index.txt
done

if [ $NET_OVERLAY == "calico" ]; then
        NETOVERLAY_MOUNTS="--volume cni-net,kind=host,source=/etc/cni/net.d \\\\\n        --mount volume=cni-net,target=/etc/cni/net.d \\\\\n        --volume cni-bin,kind=host,source=/opt/cni/bin \\\\\n        --mount volume=cni-bin,target=/opt/cni/bin \\\\"
        NETOVERLAY_DIRS="ExecStartPre=/usr/bin/mkdir -p /opt/cni/bin\n        ExecStartPre=/usr/bin/mkdir -p /etc/cni/net.d"
        NETOVERLAY_CNICONF="--cni-conf-dir=/etc/cni/net.d \\\\\n        --cni-bin-dir=/opt/cni/bin \\\\"
else
        NETOVERLAY_CNICONF="--cni-conf-dir=/etc/kubernetes/cni/net.d \\\\"
        NETOVERLAY_MOUNTS="\\\\"
        NETOVERLAY_DIRS="\\\\"
fi


#genereate the worker yamls from the worker.yaml template
for i in $1; do
sed -e "s,WORKER_IP,$i,g" \
-e "s,DISCOVERY_ID,`cat index.txt|grep DISCOVERY_ID|cut -d: -f2`,g" \
-e "s,WORKER_GW,$WORKER_GW,g" \
-e "s,DNSSERVER,$DNSSERVER,g" \
-e "s,MASTER_HOST_IP,$MASTER_HOST_IP,g" \
-e "s,CLUSTER_DNS,$CLUSTER_DNS,g" \
-e "s@ETCD_ENDPOINTS_URLS@${ETCD_ENDPOINTS_URLS}@g" \
-e "s,USER_CORE_SSHKEY1,${USER_CORE_KEY1}," \
-e "s,USER_CORE_SSHKEY2,${USER_CORE_KEY2}," \
-e "s,USER_CORE_PASSWORD,${HASHED_USER_CORE_PASSWORD},g" \
-e "s,CLOUD_PROVIDER,${CLOUD_PROVIDER},g" \
-e "s,K8S_VER,$K8S_VER,g" \
-e "s,\<CACERT\>,$CACERT,g" \
-e "s,\<WORKERKEY\>,`cat index.txt|grep -w WORKERKEY_$i|cut -d: -f2`,g" \
-e "s,\<WORKER\>,`cat index.txt|grep -w WORKER_$i|cut -d: -f2`,g" \
-e "s,\<ETCDCACERT\>,`cat index.txt|grep -w ETCDCACERT|cut -d: -f2`,g" \
-e "s,\<ETCDWORKERKEY\>,`cat index.txt|grep -w ETCDWORKERKEY_$i|cut -d: -f2`,g" \
-e "s,\<ETCDWORKER\>,`cat index.txt|grep -w ETCDWORKER_$i|cut -d: -f2`,g" \
-e "s,CLOUDCONF,`cat index.txt|grep -w CLOUDCONF|cut -d: -f2`,g" \
-e "s,FLANNEL_VER,$FLANNEL_VER,g" \
-e "s@NETOVERLAY_MOUNTS@${NETOVERLAY_MOUNTS}@g" \
-e "s@NETOVERLAY_DIRS@${NETOVERLAY_DIRS}@g" \
-e "s@NETOVERLAY_CNICONF@${NETOVERLAY_CNICONF}@g" \
../template/worker_proxy.yaml > node_$i.yaml
echo Generated: node_$i.yaml
done
echo -----------------------------------
cd -
echo ""