Consul Cluster Setup On GCE

Consul is a distributed service mesh solution that provides service discovery, health checking, key-value storage, and more. Each node in a Consul cluster runs a Consul agent, which communicates with other agents in the cluster to maintain a consistent view of the services running on the network. When an application needs to discover a service, it can send a request to the Consul cluster, which will return the address of the nearest healthy instance of the service.

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Achieved architecture using this Terraform code

List of resources created by terraform

1. Static IP
2. DNS forwarding private zone
3. TCP + UDP ILB
4. Instance Template
5. MIG
6. Backend
7. Firewall rules
8. Service account
9. Health Check

Create infra by terraform

terraform init
terraform plan
terraform apply

Steps to validate consul cluster

Connect to any of your consul cluster node and use below commands

/opt/consul/1.4.4/consul catalog nodes
dig consul.service.dc1.consul
dig @localhost -p 8600 consul.service.dc1.consul