DevOps

Running Semaphore is pretty simple. The daemon by default spawns a production ready broker. The Semaphore daemon is stateless and multiple instances could be ran at the same time to provide scalability.

Service hosts

Services could have different hosts when running Maestro in multiple environments. Service configurations could be overridden through service selectors. It is adviced to store your service selectors inside a separate file and use a environment variable to include a specific service configuration.

config.hcl

include = ["services.$ENVIRONMENT.hcl"]

services.production.hcl

services {
    select "org.users.*" {
        host = "prod.org-users.com"
    }

    select "org.projects.*" {
        host = "prod.org-projects.com"
    }
}

Service certificates

Root certificates could be included to provide secure connections. Certificates could be passed as options or be overridden through service selectors.

services {
    select "proto.users.*" {
			host = "api.jexia.com"
			insecure = "false"
			ca_file = "/etc/ca.crt"
    }

    select "proto.projects.*" {
      host = "api.jexia.com"
			insecure = "true"
    }
}

Prometheus

A Prometheus metrics endpoint could be set-up. This endpoint exposes metrics such as flow executions, executed rollbacks and flow latency. The Prometheus agent starts its own HTTP server and requires a separate port.

config.hcl

prometheus {
    address = ":5050"
}