Class: ActivePostgres::Components::Repmgr

Inherits:
Base
  • Object
show all
Defined in:
lib/active_postgres/components/repmgr.rb

Instance Attribute Summary

Attributes inherited from Base

#config, #secrets, #ssh_executor

Instance Method Summary collapse

Methods inherited from Base

#initialize

Constructor Details

This class inherits a constructor from ActivePostgres::Components::Base

Instance Method Details

#install ⇒ Object 



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# File 'lib/active_postgres/components/repmgr.rb', line 4

def install
  puts 'Installing repmgr for High Availability...'

  install_repmgr_package
  setup_primary

  config.standby_hosts.each do |host|
    setup_standby(host)
  end

  setup_inter_node_ssh if config.standby_hosts.any?
  setup_dns_failover if dns_failover_enabled?

  # Verify the entire cluster is healthy after setup
  puts "\nšŸ„ Performing final health check..."
  verify_cluster_health
end

#restart ⇒ Object 



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# File 'lib/active_postgres/components/repmgr.rb', line 54

def restart
  puts 'Restarting repmgr...'

  config.all_hosts.each do |host|
    ssh_executor.execute_on_host(host) do
      execute :sudo, 'systemctl', 'restart', 'repmgrd' if test('systemctl is-active repmgrd')
    end
  end
end

#setup_standby_only(standby_host) ⇒ Object 



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# File 'lib/active_postgres/components/repmgr.rb', line 64

def setup_standby_only(standby_host)
  puts "Setting up standby #{standby_host} (primary will not be touched)..."

  version = config.version
  install_apt_packages(standby_host, "postgresql-#{version}-repmgr")

  setup_standby(standby_host)

  setup_dns_failover if dns_failover_enabled?
end

#uninstall ⇒ Object 



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# File 'lib/active_postgres/components/repmgr.rb', line 22

def uninstall
  puts 'Uninstalling repmgr...'

  config.all_hosts.each do |host|
    is_primary = host == config.primary_host
    node_id = if is_primary
                1
              else
                begin
                  config.standby_hosts.index(host) + 2
                rescue StandardError
                  999
                end
              end

    ssh_executor.execute_on_host(host) do
      cluster_output = begin
        capture(:sudo, '-u', 'postgres', 'repmgr', 'cluster', 'show')
      rescue StandardError
        ''
      end

      if cluster_output.include?("| #{node_id}") && cluster_output.include?('running')
        info "āœ“ Skipping repmgr removal from #{host} - node #{node_id} is running"
      else
        info "Removing repmgr from #{host}"
        execute :sudo, 'apt-get', 'remove', '-y', '-q', 'postgresql-*-repmgr', '||', 'true'
      end
    end
  end
end