Setup a CoreOS cluster with fleet and etcd on Google Compute Engine.

CoreOS cluster on GCE.md

Setup a CoreOS cluster on GCE

Setup a CoreOS cluster with fleet and etcd on Google Compute Engine.

• Install gcutil and authorize it
• Make sure your Google Cloud project has billing information
• bash coreos-cluster-for-gce.sh {your project name}

Check the source of the script to see what actually happens.

The script uses https://discovery.etcd.io for cluster discovery.

coreos-cluster-for-gce.sh

#!/bin/bash

#pass the Google Compute Engine Project as parameter

ETCD_DISCOVERY_URL=$(curl https://discovery.etcd.io/new)

gcutil --project=$1 \
  addimage \
  --description="CoreOS 247.0.0" \
  coreos-production-v247-0-0 \
  gs://storage.core-os.net/coreos/amd64-generic/247.0.0/coreos_production_gce.tar.gz

for NODE in node1 node2 node3
do
    
  gcutil --project=$1 \
    addinstance $NODE \
    --image=coreos-production-v247-0-0 \
    --persistent_boot_disk \
    --zone=europe-west1-a \
    --machine_type=f1-micro \
    --metadata=startup-script:"#!/bin/sh
  ETCD_DISCOVERY_URL=$ETCD_DISCOVERY_URL
  HOSTNAME=\$(curl http://metadata/0.1/meta-data/hostname)
  IPADDR=\$(ifconfig eth0| grep 'inet ' | cut -dt -f2 | awk '{ print \$1}')
  
  sudo systemctl start fleet
  etcd -name \$HOSTNAME -peer-addr \$IPADDR:7001 -addr \$IPADDR:4001 -discovery \$ETCD_DISCOVERY_URL
  "
  
  gcutil --project=$1 ssh --ssh_user=core $NODE "curl http://metadata/0.1/meta-data/attributes/startup-script | bash"
    
done

echo ""
echo "The etcd discovery url is: $ETCD_DISCOVERY_URL"