Class: Dash::Cli::Proxy::LoadbalancerReboot

Inherits:
Object
  • Object
show all
Defined in:
lib/dash/cli/proxy/loadbalancer_reboot.rb

Overview

Replaces the loadbalancer container with one booted from the current configuration. Shared by dash proxy reboot and the drift-detected reboot on boot - the same sequence either way, so the two paths cannot diverge.

Unlike the proxy hosts' port-holder handoff this is stop -> run: the loadbalancer keeps its service state in the config volume, which the replacement container re-mounts, so every app's routes survive the gap.

Constant Summary collapse

READY_TIMEOUT = 
30

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(host, sshkit) ⇒ LoadbalancerReboot

Returns a new instance of LoadbalancerReboot.



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# File 'lib/dash/cli/proxy/loadbalancer_reboot.rb', line 14

def initialize(host, sshkit)
  @host = host
  @sshkit = sshkit
end

Instance Attribute Details

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/dash/cli/proxy/loadbalancer_reboot.rb', line 11

def host
  @host
end

#sshkit ⇒ Object (readonly)

Returns the value of attribute sshkit.



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# File 'lib/dash/cli/proxy/loadbalancer_reboot.rb', line 11

def sshkit
  @sshkit
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/dash/cli/proxy/loadbalancer_reboot.rb', line 19

def run
  execute *DASH.auditor.record("Rebooted loadbalancer"), verbosity: :debug
  execute *DASH.registry.
  ensure_network

  # After the network the bridge attaches the legacy network's containers to,
  # and before anything that could create the new container or let `docker
  # run --volume` create dash-loadbalancer-config empty: adopt the legacy
  # volume's routing table, dynamic domains and ACME cache. Carries the
  # apps-config mkdir this reboot paid a round trip for anyway
  # (zoolutions/dash#168, see Dash::Commands::Loadbalancer#legacy_rename).
  execute *DASH.loadbalancer.prepare_boot

  info "Stopping and removing #{DASH.loadbalancer.container_name} on #{host}, if running..."
  execute *DASH.loadbalancer.stop, raise_on_non_zero_exit: false
  execute *DASH.loadbalancer.remove_container

  if (lb_run = DASH.loadbalancer_config.run).secrets?
    execute *DASH.loadbalancer.ensure_proxy_directory
    upload! lb_run.secrets_io, lb_run.secrets_path, mode: "0600"
  else
    execute *DASH.loadbalancer.remove_proxy_secrets_file, raise_on_non_zero_exit: false
  end

  Dash::Cli::Proxy::LoadbalancerClaim.new(host, sshkit).claim_run_config(replace: true)
  execute *DASH.loadbalancer.run

  wait_until_ready
  verify_service if re_register_service

  # dash-proxy keeps its service state in the config volume, which the
  # replacement container re-mounts - every app's routes survive.
  services = capture_with_info(*DASH.loadbalancer.list).strip
  info "Services registered on the load balancer at #{host} after reboot:\n#{services}"
end