theforeman/foreman · error · Foreman::FingerprintException

The remote system presented a public key with hash %s but we

Error message

The remote system presented a public key with hash %s but we're expecting a different hash. If you are sure the remote system is authentic, go to the compute resource edit page, press the 'Test Connection' or 'Load Datacenters' button and submit

What it means

Error "The remote system presented a public key with hash %s but we're expecting a different hash. If you are sure the remote system is authentic, go to the compute resource edit page, press the 'Test Connection' or 'Load Datacenters' button and submit" thrown in theforeman/foreman.

Source

Thrown at app/models/compute_resources/foreman/model/vmware.rb:796

    def update_public_key(options = {})
      return unless pubkey_hash.blank? || options[:force]
      client
    rescue Foreman::FingerprintException => e
      self.pubkey_hash = e.fingerprint
    end

    def client
      @client ||= ::Fog::Compute.new(
        :provider                     => "vsphere",
        :vsphere_username             => user,
        :vsphere_password             => password,
        :vsphere_server               => server,
        :vsphere_expected_pubkey_hash => pubkey_hash
      )
    rescue => e
      case e.message
      when /The remote system presented a public key with hash (\w+) but we're expecting a hash of/
        raise Foreman::FingerprintException.new(
          N_("The remote system presented a public key with hash %s but we're expecting a different hash. If you are sure the remote system is authentic, go to the compute resource edit page, press the 'Test Connection' or 'Load Datacenters' button and submit"), Regexp.last_match(1))
      when /Cannot complete login due to an incorrect user name or password./
        raise Foreman::UsernameOrPasswordException.new(
          N_("Can not load datacenters due to an incorrect user name or password."))
      else
        raise e
      end
    end

    def unused_vnc_port(ip)
      10.times do
        port   = rand(5901..5964)
        unused = (TCPSocket.connect(ip, port).close rescue true)
        return port if unused
      end
      raise "no unused port found"
    end

View on GitHub (pinned to 6b05625475)

When it happens

Trigger: Thrown at app/models/compute_resources/foreman/model/vmware.rb:796 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of theforeman/foreman@6b05625475 (2026-08-23). Data as JSON: /api/errors/cfa6a0f884e0ba61. Report an issue: GitHub.