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Terraform GKE Autopilot mastodon module

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This is a Terraform module to install and configure a Mastodon instance in a GKE Autopilot cluster using the official GitLab Runner Helm Chart.

This module is provided without any kind of warranty and is AGPL3 licensed.

Architecture

Diagram

Pricing model

TODO: Pricing should be still finalized.

At the moment of writing, the architecture is composed of the following components:

Using Redis in Memorystore

  1. GKE Autopilot - 1 control plane free of charge per billing account, otherwise around - 70$/monthly
  2. Cloudsql tier: db-g1-small - 25$/monthly
  3. Memorystore Redis 1GB - 35$/monthly
  4. 5 GKE Replicas (web, streaming, worker) as "0.5 CPU / 512MB" using spot nodes - 25$/Monthly

For a total of:

  • GKE Autopilot free-tier: 85$/monthly
  • GKE Autopilot: 155$/monthly

Using Redis in GKE

  1. Redis master - "0.250 CPU / 512MB" - 8$
  2. Redis replicas 3 x 0.250 CPU / 512MB on Spot nodes - 7$

For a total of:

  • GKE Autopilot free-tier: 65$/monthly
  • GKE Autopilot: 135$/monthly