Class: ActivePostgres::HealthChecker

Inherits:
Object
  • Object
show all
Defined in:
lib/active_postgres/health_checker.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ HealthChecker

Returns a new instance of HealthChecker.



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# File 'lib/active_postgres/health_checker.rb', line 5

def initialize(config)
  @config = config
  @executor = create_executor
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/active_postgres/health_checker.rb', line 3

def config
  @config
end

#executor ⇒ Object (readonly)

Returns the value of attribute executor.



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# File 'lib/active_postgres/health_checker.rb', line 3

def executor
  @executor
end

Instance Method Details

#cluster_status ⇒ Object 



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# File 'lib/active_postgres/health_checker.rb', line 108

def cluster_status
  status = {
    primary: {
      host: config.primary_host,
      status: check_postgres_running(config.primary_host) ? 'running' : 'down',
      connections: get_connection_count(config.primary_host),
      replication_lag: nil
    },
    standbys: []
  }

  config.standby_hosts.each do |host|
    standby_status = {
      host: host,
      status: check_postgres_running(host) ? 'streaming' : 'down',
      lag: get_replication_lag(host),
      sync_state: 'async'
    }
    status[:standbys] << standby_status
  end

  status
end

#run_health_checks ⇒ Object 



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# File 'lib/active_postgres/health_checker.rb', line 51

def run_health_checks
  puts '==> Running health checks...'
  puts

  all_ok = true

  # Check primary
  print "Primary (#{config.primary_host})... "
  if check_postgres_running(config.primary_host)
    puts '✓'
  else
    puts '✗'
    all_ok = false
  end

  # Check standbys
  config.standby_hosts.each do |host|
    print "Standby (#{host})... "
    if check_postgres_running(host) && check_replication_status(host)
      puts '✓'
    else
      puts '✗'
      all_ok = false
    end
  end

  # Check pgbouncer on all hosts
  if config.component_enabled?(:pgbouncer)
    puts
    puts '==> Checking PgBouncer...'
    config.all_hosts.each do |host|
      print "PgBouncer (#{host})... "
      pgbouncer_ok = check_pgbouncer_running(host)
      userlist_ok = check_pgbouncer_userlist(host)

      if pgbouncer_ok && userlist_ok
        puts '✓'
      elsif pgbouncer_ok && !userlist_ok
        puts '✗ (missing app user in userlist)'
        all_ok = false
      else
        puts '✗'
        all_ok = false
      end
    end
  end

  puts
  if all_ok
    puts '✓ All checks passed'
  else
    puts '✗ Some checks failed'
  end

  all_ok
end

#show_status ⇒ Object 



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# File 'lib/active_postgres/health_checker.rb', line 33

def show_status
  puts
  puts "PostgreSQL Cluster Status (#{config.environment})"
  puts '=' * 70
  puts

  # Collect all node data first
  nodes = collect_node_status

  # Print table
  print_status_table(nodes)

  # Print components
  print_components

  puts
end

#ssh_executor ⇒ Object

Backwards compatibility alias



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# File 'lib/active_postgres/health_checker.rb', line 11

def ssh_executor
  @executor
end

#use_ssh_executor? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_postgres/health_checker.rb', line 23

def use_ssh_executor?
  mode = ENV['ACTIVE_POSTGRES_STATUS_MODE'].to_s.strip.downcase
  return true if mode == 'ssh'
  return false if mode == 'direct'

  return false if %w[localhost 127.0.0.1 ::1].include?(config.primary_host.to_s)

  true
end