Class: Philae::PostgreSQLProbe

Inherits:
Object
  • Object
show all
Defined in:
lib/philae/pgsql_probe.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, connection_string) ⇒ PostgreSQLProbe

Returns a new instance of PostgreSQLProbe.



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# File 'lib/philae/pgsql_probe.rb', line 10

def initialize(name, connection_string)
  @name = name
  @connection_string = connection_string
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/philae/pgsql_probe.rb', line 8

def name
  @name
end

Instance Method Details

#check ⇒ Object 



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# File 'lib/philae/pgsql_probe.rb', line 15

def check
  begin
    res = PG::Connection.ping(@connection_string)
  rescue
    return { healthy: false, comment: 'Unable to contact PostgreSQL' }
  end
  return { healthy: true, comment: '' } if res == PG::PQPING_OK

  # https://deveiate.org/code/pg/PG/Connection.html#method-c-ping
  reasons = {
    PG::PQPING_REJECT => 'server is alive but rejecting connections',
    PG::PQPING_NO_RESPONSE => 'could not establish connection',
    PG::PQPING_NO_ATTEMPT => 'connection not attempted (bad params)',
  }
  return { healthy: false, comment: "Ping to PostgreSQL failed with the following reason: #{reasons[res]}" }
end