$(sys.inputdir)/update.cf is responsible for updating policy from the hub as well as ensuring various core cfenigne components are running.

common bodies

control

Prototype: control

Description: Common control attributes for all components

Implementation:

code
body common control
{
      bundlesequence => {
                          "update_def",
                          "u_cfengine_enterprise",
                          @(u_cfengine_enterprise.def),
                          "cfe_internal_dc_workflow",
                          "cfe_internal_update_policy",
                          "cfengine_internal_standalone_self_upgrade",
                          "cfe_internal_update_processes",
                          @(update_def.bundlesequence_end), # Define control_common_update_bundlesequnce_end via augments
      };

      version => "update.cf 3.24.0a.115d55e35";

      inputs => {
                  "cfe_internal/update/lib.cf",
                  "cfe_internal/update/systemd_units.cf",
                  @(cfengine_update_controls.update_def_inputs),
                  "cfe_internal/update/cfe_internal_dc_workflow.cf",
                  "cfe_internal/update/cfe_internal_update_from_repository.cf",
                  "cfe_internal/update/update_policy.cf",
                  "cfe_internal/update/update_processes.cf",
                  @(update_def.augments_inputs)
      };

    any::
        ignore_missing_bundles => "$(update_def.control_common_ignore_missing_bundles)";
        ignore_missing_inputs => "$(update_def.control_common_ignore_missing_inputs)";

    control_common_tls_min_version_defined::
        tls_min_version => "$(default:def.control_common_tls_min_version)"; # See also: allowtlsversion in body server control

    control_common_tls_ciphers_defined::
        tls_ciphers => "$(default:def.control_common_tls_ciphers)"; # See also: allowciphers in body server control
}

agent bodies

control

Prototype: control

Description: Agent controls for update

Implementation:

code
body agent control
{
      ifelapsed => "1";
      skipidentify => "true";

    control_agent_agentfacility_configured::

        agentfacility => "$(default:update_def.control_agent_agentfacility)";

    mpf_update_control_agent_default_repository::

      # Location to backup files before they are edited by cfengine

        default_repository => "$(update_def.control_agent_default_repository)";

}

classes bodies

u_kept_successful_command

Prototype: u_kept_successful_command

Description: Set command to "kept" instead of "repaired" if it returns 0

Implementation:

code
body classes u_kept_successful_command
{
      kept_returncodes => { "0" };
      failed_returncodes => { "1" };
}

contain bodies

in_shell

Prototype: in_shell

Implementation:

code
body contain in_shell
{
  useshell => "true";
}

common bodies

cfengine_update_controls

Prototype: cfengine_update_controls

Description: Resolve other controls necessary for update

Implementation:

code
bundle common cfengine_update_controls
{
  vars:
       "update_def_inputs"
        slist => {
                   "controls/update_def.cf",
                   "controls/update_def_inputs.cf",
                 };

  reports:
    DEBUG|DEBUG_cfengine_update_controls::
      "DEBUG $(this.bundle): update def inputs='$(update_def_inputs)'";
}

agent bundles

cfengine_internal_standalone_self_upgrade

Prototype: cfengine_internal_standalone_self_upgrade

Description: Manage desired version state and execution of policy to reach the target version.

Implementation:

code
bundle agent cfengine_internal_standalone_self_upgrade
{
  methods:
      "cfengine_internal_standalone_self_upgrade_state_data";
      "cfengine_internal_standalone_self_upgrade_execution";
}

cfengine_internal_standalone_self_upgrade_state_data

Prototype: cfengine_internal_standalone_self_upgrade_state_data

Description: Clear stale recorded desired version information from state

Implementation:

code
bundle agent cfengine_internal_standalone_self_upgrade_state_data
{
  vars:

      "binary_upgrade_entry"
        string => "$(this.promise_dirname)/standalone_self_upgrade.cf";

      "desired_pkg_data_path" string =>
        "$(cfengine_internal_standalone_self_upgrade_execution.desired_pkg_data_path)";

  files:

      # We consider the data stale if it's older than the policy that generated it
      "$(desired_pkg_data_path)" -> { "ENT-4317" }
        delete => u_tidy,
        if => isnewerthan( $(binary_upgrade_entry) , $(desired_pkg_data_path) );
}

cfengine_internal_standalone_self_upgrade_execution

Prototype: cfengine_internal_standalone_self_upgrade_execution

Description: Manage the version of CFEngine that is currently installed. This policy executes a stand alone policy as a sub agent. If systemd is found we assume that it is necessary to escape the current unit via systemd-run.

If the running version matches either the desired version information in state or the version supplied from augments, then we skip running the standalone upgrade policy.

Implementation:

code
bundle agent cfengine_internal_standalone_self_upgrade_execution
{
  vars:

      "exec_prefix"
        string => ifelse( isexecutable("/bin/systemd-run"), "/bin/systemd-run --unit=cfengine-upgrade --scope ", # trailing space in commands important
                          isexecutable( "/usr/bin/systemd-run" ), "/usr/bin/systemd-run --unit=cfengine-upgrade --scope ",
                          "");

      "local_update_log_dir"
        string => translatepath("$(sys.workdir)/software_updates/update_log"),
        comment => "This directory is used for logging the current version of cfengine running.";

      "hub_binary_version" -> { "ENT-10664" }
        data => data_regextract(
                                 "^(?<major_minor_patch>\d+\.\d+\.\d+)-(?<release>\d+)",
                                 readfile("$(sys.statedir)$(const.dirsep)hub_cf_version.txt" ) ),
        if => fileexists( "$(sys.statedir)$(const.dirsep)hub_cf_version.txt" );

  classes:
      # If we are running the version explicitly defined by the user
      "at_desired_version_by_user_specification" -> { "ENT-3592" }
        expression => strcmp( "$(def.cfengine_software_pkg_version)", "$(sys.cf_version)" );

      "at_desired_version_by_hub_binary_version" -> { "ENT-10664" }
        expression => strcmp( "$(hub_binary_version[major_minor_patch])", "$(sys.cf_version)" );

      "at_desired_version"
        or => { "at_desired_version_by_user_specification",
                "at_desired_version_by_hub_binary_version" };

    policy_server|am_policy_hub::

      "downloaded_target_binaries"
        expression => fileexists( "$(sys.workdir)/master_software_updates/$(def.cfengine_software_pkg_version)-downloaded.txt"),
        if => isvariable( "def.cfengine_software_pkg_version");

      "downloaded_target_binaries"
        expression => fileexists( "$(sys.workdir)/master_software_updates/$(sys.cf_version_major).$(sys.cf_version_minor).$(sys.cf_version_patch)-downloaded.txt"),
        if => not( isvariable( "def.cfengine_software_pkg_version") );

  files:

    !(policy_server|am_policy_hub)::

      "$(sys.statedir)/hub_cf_version.txt" -> { "ENT-10664", "handle:server_access_grant_access_state_cf_version" }
        comment => concat( "We copy the hub binary version state locally",
                           " so that we can target the hubs binary",
                           " version as the default target version for",
                           " self upgrade." ),
        handle => "cfe_internal_update_hub_cf_version",
        copy_from => u_remote_dcp_missing_ok( "hub-cf_version", $(sys.policy_hub) );

    policy_server|am_policy_hub::

      "$(sys.statedir)/cf_version.txt" -> { "ENT-10664", "handle:server_access_grant_access_state_cf_version" }
        comment => concat( "We record the hubs binary version in state and this",
                           " is shared with clients so that clients can target",
                           " the hubs binary version as the default target",
                           " version for self upgrade." ),
        handle => "cfe_internal_update_state_cf_version",
        content => "$(sys.cf_version_major).$(sys.cf_version_minor).$(sys.cf_version_patch)-$(sys.cf_version_release)";

    enterprise_edition::

      "$(local_update_log_dir)/$(sys.cf_version)_is_running" -> { "ENT-4352" }
        comment => "This results in a record of the first time the enterprise
                    agent of a given version is seen to run on a host.",
        handle => "cfe_internal_update_bins_files_version_is_running",
        create => "true";

  commands:

    trigger_upgrade.!(at_desired_version|mpf_disable_hub_masterfiles_software_update_seed|downloaded_target_binaries)::

      '$(exec_prefix)$(sys.cf_agent) --inform --timestamp --file "$(this.promise_dirname)$(const.dirsep)standalone_self_upgrade.cf" --define trigger_upgrade,update_cf_initiated >"$(sys.workdir)$(const.dirsep)outputs/standalone_self_upgrade_$(sys.cdate).log"'
      handle => "standalone_self_upgrade",
      contain => in_shell;

  reports:

    trigger_upgrade.(inform_mode|verbose_mode|DEBUG|DEBUG_cfengine_internal_standalone_self_upgrade)::
      "Skipped self upgrade because we are running the desired version $(sys.cf_version)" -> { "ENT-3592" }
        if => "at_desired_version";

}