Google Kubernetes Engine

All the goroutines are deployed to a Kubernetes cluster with the same basic steps, but first a bit of configuration to the environment variables for each server is required.

Environment Variables

Lighthouse Server

Variable	Description
`GKE_LH_CLUSTER`	The name of the cluster. Default is`lighthouse-server`.
`GKE_LH_CLUSTER_VERSION`	The Kubernetes version to use for the master and nodes. You can check which Kubernetes versions are default and available in a given zone by running the following command:
	`gcloud container get-server-config --zone [COMPUTE-ZONE]`
`GKE_LH_CPU_PERCENT`	The average percent CPU utilization across all pods. Must be a range of `1-100`.
`GKE_LH_DISK_SIZE`	Size in GB for node VM boot disks. An example value is `100`.
`GKE_LH_IMAGE`	The name of the Docker image. Default is`lighthouse-server`.
`GKE_LH_MACHINE_TYPE`	The type of machine to use for nodes. An example value is `n1-standard-1`.
`GKE_LH_MAX_NODES`	Maximum number of nodes to which the node pool can scale.
`GKE_LH_MAX_PODS`	Maximum number of Pods you want to run based on the CPU utilization of your existing Pods.
`GKE_LH_MIN_NODES`	Minimum number of nodes to which the node pool can scale.
`GKE_LH_MIN_PODS`	Minimum number of Pods you want to run based on the CPU utilization of your existing Pods.
`GKE_LH_NUM_NODES`	The number of nodes to be created in each of the cluster’s zones.
`GKE_LH_REPLICAS`	The number of desired Pods in the initial deployment.

PHPCS Server

Variable	Description
`GKE_PHPCS_CLUSTER`	The name of the cluster. Default is `phpcs-server`.
`GKE_PHPCS_CLUSTER_VERSION`	The Kubernetes version to use for the master and nodes. You can check which Kubernetes versions are default and available in a given zone by running the following command:
	`gcloud container get-server-config --zone [COMPUTE-ZONE]`
`GKE_PHPCS_CPU_PERCENT`	The average percent CPU utilization across all pods. Must be a range of `1-100`.
`GKE_PHPCS_DISK_SIZE`	Size in GB for node VM boot disks. An example value is `100`.
`GKE_PHPCS_IMAGE`	The name of the Docker image. Default is `phpcs-server`.
`GKE_PHPCS_MACHINE_TYPE`	The type of machine to use for nodes. An example value is `n1-standard-1`.
`GKE_PHPCS_MAX_NODES`	Maximum number of nodes to which the node pool can scale.
`GKE_PHPCS_MAX_PODS`	Maximum number of Pods you want to run based on the CPU utilization of your existing Pods.
`GKE_PHPCS_MIN_NODES`	Minimum number of nodes to which the node pool can scale.
`GKE_PHPCS_MIN_PODS`	Minimum number of Pods you want to run based on the CPU utilization of your existing Pods.
`GKE_PHPCS_NUM_NODES`	The number of nodes to be created in each of the cluster’s zones.
`GKE_PHPCS_REPLICAS`	The number of desired Pods in the initial deployment.

Sync Server

Variable	Description
`GKE_SYNC_CLUSTER`	The name of the cluster. Default is `sync-server`.
`GKE_SYNC_CLUSTER_VERSION`	The Kubernetes version to use for the master and nodes. You can check which Kubernetes versions are default and available in a given zone by running the following command:
	`gcloud container get-server-config --zone [COMPUTE-ZONE]`
`GKE_SYNC_DISK_SIZE`	Size in GB for node VM boot disks. An example value is `100`.
`GKE_SYNC_IMAGE`	The name of the Docker image. Default is `sync-server`.
`GKE_SYNC_MACHINE_TYPE`	The type of machine to use for nodes. An example value is `n1-standard-1`.
`GKE_SYNC_PERSISTENT_DISK_TYPE`	Type of persistent disk. Must be one of: `pd-standard`, `pd-ssd`.
`GKE_SYNC_PERSISTENT_DISK_SIZE`	Size in GB for the persistent disk. An example value is `100GB`.

Deploy

Once you’ve got the variables setup it’s basically push the image to Google Container Registry (GCR), create the Kubernetes cluster, and then create a Kubernetes deployment. I’ll demonstrate it with the PHPCS Server. Other than specific make commands for each service, these steps are all the same.

Push the image to GCR:

make phpcs.push.image

Create the GKE cluster:

make phpcs.build.cluster

Deploy the GKE cluster:

make phpcs.deploy.cluster

Delete the GKE cluster:

make phpcs.clean.cluster