nomad-consul-fabio-dnsmasq-gcp-demo

Prerequisites

Setup

1. Create a new project in Google Compute Engine and call it : nomad-consul-fabio-dnsmasq. When the project is ready, open the Cloud Shell.

2. Clone this repository :

cd ~
git clone https://github.com/HashiStack/nomad-consul-fabio-dnsmasq-gcp-demo.git
cd nomad-consul-fabio-dnsmasq-gcp-demo

3. Create three Compute Engine instances named respectively c1, c2 and c3. The startup script server-install.sh will install and configure Nomad and Consul.

gcloud compute instances create c1 c2 c3 \
  --image-project ubuntu-os-cloud \
  --image-family ubuntu-1604-lts \
  --zone=us-west1-a \
  --boot-disk-size 10GB \
  --machine-type n1-standard-1 \
  --can-ip-forward \
  --metadata-from-file startup-script=server-install.sh

Output :

Created [https://www.googleapis.com/compute/v1/projects/nomad-consul-fabio-dnsmasq/zones/us-west1-a/instances/c1].
Created [https://www.googleapis.com/compute/v1/projects/nomad-consul-fabio-dnsmasq/zones/us-west1-a/instances/c2].
Created [https://www.googleapis.com/compute/v1/projects/nomad-consul-fabio-dnsmasq/zones/us-west1-a/instances/c3].

NAME  ZONE        MACHINE_TYPE   PREEMPTIBLE  INTERNAL_IP  EXTERNAL_IP    STATUS
c1    us-west1-a  n1-standard-1               10.138.0.4   35.197.35.11   RUNNING
c2    us-west1-a  n1-standard-1               10.138.0.5   35.197.33.196  RUNNING
c3    us-west1-a  n1-standard-1               10.138.0.3   35.197.45.197  RUNNING

Verify

Ssh to c1 :

gcloud compute ssh c1

Let c1 join c2 and c3. Once joined, the gossip layer will handle discovery between c2 and c3.

nomad server-join c2 c3

Output :

Joined 2 servers successfully

Complete the setup of the consul cluster

consul join c2 c3

Output :

Successfully joined cluster by contacting 2 nodes.

Verify :

consul members

Node  Address          Status  Type    Build  Protocol  DC
c1    10.138.0.4:8301  alive   server  0.8.5  2         dc1
c2    10.138.0.5:8301  alive   server  0.8.5  2         dc1
c3    10.138.0.3:8301  alive   server  0.8.5  2         dc1

Bootstrap Worker Nodes

gcloud compute instances create w1 w2 w3 \
  --image-project ubuntu-os-cloud \
  --image-family ubuntu-1604-lts \
  --zone=us-west1-a \
  --boot-disk-size 10GB \
  --machine-type n1-standard-1 \
  --metadata-from-file startup-script=client-install.sh

Deploy Consul to worker nodes

nomad run jobs/consul.nomad

consul join w1 w2 w3 w4 w5