Module: Kamal::Cli::Healthcheck::Poller

Extended by:
Poller
Included in:
Poller
Defined in:
lib/kamal/cli/healthcheck/poller.rb

Defined Under Namespace

Classes: HealthcheckError

Constant Summary collapse

TRAEFIK_UPDATE_DELAY = 
5

Instance Method Summary collapse

Instance Method Details

#wait_for_healthy(pause_after_ready: false, &block) ⇒ Object 



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# File 'lib/kamal/cli/healthcheck/poller.rb', line 8

def wait_for_healthy(pause_after_ready: false, &block)
  attempt = 1
  max_attempts = KAMAL.config.healthcheck["max_attempts"]

  begin
    case status = block.call
    when "healthy"
      sleep TRAEFIK_UPDATE_DELAY if pause_after_ready
    when "running" # No health check configured
      sleep KAMAL.config.readiness_delay if pause_after_ready
    else
      raise HealthcheckError, "container not ready (#{status})"
    end
  rescue HealthcheckError => e
    if attempt <= max_attempts
      info "#{e.message}, retrying in #{attempt}s (attempt #{attempt}/#{max_attempts})..."
      sleep attempt
      attempt += 1
      retry
    else
      raise
    end
  end

  info "Container is healthy!"
end

#wait_for_unhealthy(pause_after_ready: false, &block) ⇒ Object 



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# File 'lib/kamal/cli/healthcheck/poller.rb', line 35

def wait_for_unhealthy(pause_after_ready: false, &block)
  attempt = 1
  max_attempts = KAMAL.config.healthcheck["max_attempts"]

  begin
    case status = block.call
    when "unhealthy"
      sleep TRAEFIK_UPDATE_DELAY if pause_after_ready
    else
      raise HealthcheckError, "container not unhealthy (#{status})"
    end
  rescue HealthcheckError => e
    if attempt <= max_attempts
      info "#{e.message}, retrying in #{attempt}s (attempt #{attempt}/#{max_attempts})..."
      sleep attempt
      attempt += 1
      retry
    else
      raise
    end
  end

  info "Container is unhealthy!"
end