Class: Dash::Cli::Proxy::Drift

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(host, sshkit) ⇒ Drift

Returns a new instance of Drift.



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# File 'lib/dash/cli/proxy/drift.rb', line 5

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/drift.rb', line 2

def host
  @host
end

#sshkit ⇒ Object (readonly)

Returns the value of attribute sshkit.



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# File 'lib/dash/cli/proxy/drift.rb', line 2

def sshkit
  @sshkit
end

Instance Method Details

#container_exists? ⇒ Boolean

Returns:

  • (Boolean) 


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

def container_exists?
  state.exists?
end

#drifted? ⇒ Boolean

A proxy container has drifted when it was started with a different config digest than the one the current configuration produces. Containers booted by older dash versions carry no digest label and count as drifted, so they converge on the first deploy after upgrading.

Returns:

  • (Boolean) 


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# File 'lib/dash/cli/proxy/drift.rb', line 33

def drifted?
  return @drifted if defined?(@drifted)
  @drifted = container_exists? && current_digest != expected_digest
end

#expected_digest ⇒ Object 



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# File 'lib/dash/cli/proxy/drift.rb', line 38

def expected_digest
  @expected_digest ||= if proxy.proxy_run_config
    proxy.proxy_run_config.config_digest
  else
    Dash::Configuration::Proxy::Run.digest(capture_with_info(*proxy.boot_config).strip)
  end
end

#state ⇒ Object

One docker inspect for everything a boot asks about the running proxy: whether it exists, which image tag it runs, and the digest it was booted with. Captured once per instance - dash proxy boot reads all three off it, and dash doctor only the first.



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# File 'lib/dash/cli/proxy/drift.rb', line 13

def state
  @state ||= Dash::Commands::Proxy::State.parse(
    capture_with_info(*proxy.inspect_state, raise_on_non_zero_exit: false)
  )
end

#version ⇒ Object

The tag the running proxy was booted from, for the minimum-version gate. Nil when nothing is running - a host with no proxy has no version to be too old.



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# File 'lib/dash/cli/proxy/drift.rb', line 25

def version
  state.version
end