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November 10, 2025 18:18
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Discourse forum Nomad deployment
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| # Self-contained Nomad job file for deploying a Discourse instance. Uses Postgres, Redis, and Discourse Docker containers. SSL-enabled. | |
| # Create a vars.hcl file and set values for the below variable names (one per line), eg: hostname=yoursite.com | |
| # Then run `nomad run -var-file=vars.hcl discourse-forum.hcl` | |
| # Global database configuration variables. | |
| variable "hostname" {} | |
| variable "developer_emails" {} | |
| variable "db_name" {} | |
| variable "db_username" {} | |
| variable "db_password" {} | |
| variable "smtp_address" {} | |
| variable "smtp_port" {} | |
| variable "smtp_user_name" {} | |
| variable "smtp_password" {} | |
| # SSL/HTTPS configuration variables. | |
| variable "enable_https" { | |
| type = bool | |
| default = true | |
| } | |
| variable "letsencrypt_account_email" { | |
| type = string | |
| default = "[email protected]" | |
| } | |
| # Nomad job for Discourse forum. | |
| job "forum" { | |
| datacenters = ["dc1"] | |
| type = "service" | |
| # Main group. | |
| group "discourse" { | |
| network { | |
| mode = "host" | |
| port "http" { | |
| static = 80 | |
| } | |
| port "https" { | |
| static = 443 | |
| } | |
| port "postgres" { | |
| to = 5432 | |
| } | |
| port "redis" { | |
| to = 6379 | |
| } | |
| } | |
| # Register Discourse service for discovery. | |
| service { | |
| name = "discourse" | |
| port = "http" | |
| provider = "nomad" | |
| } | |
| service { | |
| name = "discourse-https" | |
| port = "https" | |
| provider = "nomad" | |
| } | |
| # Define persistent volumes for Discourse data and Postgres data. | |
| volume "discourse_data" { | |
| type = "host" | |
| source = "discourse_data" | |
| read_only = false | |
| } | |
| volume "discourse_pg_data" { | |
| type = "host" | |
| source = "discourse_pg_data" | |
| read_only = false | |
| } | |
| volume "discourse_ssl" { | |
| type = "host" | |
| source = "discourse_ssl" | |
| read_only = false | |
| } | |
| # Main Postgres database task. | |
| task "postgres" { | |
| driver = "docker" | |
| volume_mount { | |
| volume = "discourse_pg_data" | |
| destination = "/var/lib/postgresql/data" | |
| } | |
| config { | |
| # Discourse's official Postgres image (with pgvector and other exts). | |
| image = "discourse/postgres:latest" | |
| ports = ["postgres"] | |
| network_mode = "host" | |
| } | |
| # Postgres DB credentials using global variables. | |
| env { | |
| POSTGRES_DB = var.db_name | |
| DB_USER = var.db_username | |
| DB_PASSWORD = var.db_password | |
| } | |
| resources { | |
| cpu = 1024 | |
| memory = 2048 | |
| } | |
| } | |
| # Redis for Discourse caching. | |
| task "redis" { | |
| driver = "docker" | |
| config { | |
| image = "redis:8-alpine" | |
| ports = ["redis"] | |
| network_mode = "host" | |
| } | |
| resources { | |
| cpu = 1024 | |
| memory = 2048 | |
| } | |
| } | |
| # Discourse application. | |
| task "discourse" { | |
| driver = "docker" | |
| volume_mount { | |
| volume = "discourse_data" | |
| destination = "/shared" | |
| } | |
| volume_mount { | |
| volume = "discourse_ssl" | |
| destination = "/shared/ssl" | |
| } | |
| config { | |
| image = "discourse/discourse:latest" | |
| ports = ["http", "https"] | |
| network_mode = "host" | |
| } | |
| # Discourse configuration via environment variables. | |
| env { | |
| DISCOURSE_HOSTNAME = var.hostname | |
| DISCOURSE_DEVELOPER_EMAILS = var.developer_emails | |
| DISCOURSE_SMTP_ADDRESS = var.smtp_address | |
| DISCOURSE_SMTP_PORT = var.smtp_port | |
| DISCOURSE_SMTP_USER_NAME = var.smtp_user_name | |
| DISCOURSE_SMTP_PASSWORD = var.smtp_password | |
| DISCOURSE_DB_NAME = var.db_name | |
| DISCOURSE_DB_USERNAME = var.db_username | |
| DISCOURSE_DB_PASSWORD = var.db_password | |
| DISCOURSE_DB_HOST = "${NOMAD_IP_postgres}" | |
| DISCOURSE_DB_PORT = "${NOMAD_PORT_postgres}" | |
| DISCOURSE_REDIS_HOST = "${NOMAD_IP_redis}" | |
| DISCOURSE_REDIS_PORT = "${NOMAD_PORT_redis}" | |
| # SSL/HTTPS configuration. | |
| DISCOURSE_ENABLE_HTTPS = var.enable_https | |
| LETSENCRYPT_ACCOUNT_EMAIL = var.letsencrypt_account_email | |
| } | |
| resources { | |
| cpu = 1024 | |
| memory = 2048 | |
| } | |
| } | |
| } | |
| } |
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