gchar *determine_manifest_to_open(const gchar *old_manifest, const gchar *coordinator_profile_path, gchar *profile)
{
if(old_manifest == NULL)
return determine_previous_manifest_file(coordinator_profile_path, profile);
else
return g_strdup(old_manifest);
}
int lock_or_unlock(const int do_lock, const gchar *manifest_file, const gchar *coordinator_profile_path, gchar *profile)
{
GPtrArray *distribution_array;
GPtrArray *target_array;
int exit_status;
if(manifest_file == NULL)
{
/* Get current username */
char *username = (getpwuid(geteuid()))->pw_name;
/* If no manifest file has been provided, try opening the last deployed one */
gchar *old_manifest_file = determine_previous_manifest_file(coordinator_profile_path, username, profile);
if(old_manifest_file == NULL)
{
g_printerr("[coordinator]: No previous manifest file exists, so no locking operations will be executed!\n");
return 0;
}
else
{
distribution_array = generate_distribution_array(old_manifest_file);
target_array = generate_target_array(old_manifest_file);
g_free(old_manifest_file);
}
}
else
{
/* Open the provided manifest */
distribution_array = generate_distribution_array(manifest_file);
target_array = generate_target_array(manifest_file);
}
if(distribution_array == NULL || target_array == NULL)
{
g_printerr("ERROR: Cannot open manifest file!\n");
exit_status = 1;
}
else
{
/* Override SIGINT's behaviour to allow stuff to be rollbacked in case of an interruption */
set_flag_on_interrupt();
/* Do the locking */
if(do_lock)
exit_status = lock(distribution_array, target_array, profile);
else
exit_status = unlock(distribution_array, target_array, profile);
}
/* Cleanup */
delete_target_array(target_array);
delete_distribution_array(distribution_array);
/* Return exit status */
return exit_status;
}
int restore(const gchar *manifest_file, const unsigned int max_concurrent_transfers, const int transfer_only, const int all, const gchar *old_manifest, const gchar *coordinator_profile_path, gchar *profile, const gboolean no_upgrade, const gchar *container_filter, const gchar *component_filter)
{
/* Generate a distribution array from the manifest file */
Manifest *manifest = open_provided_or_previous_manifest_file(manifest_file, coordinator_profile_path, profile, MANIFEST_SNAPSHOT_FLAG, container_filter, component_filter);
if(manifest == NULL)
{
g_print("[coordinator]: Error while opening manifest file!\n");
return 1;
}
else
{
int exit_status;
GPtrArray *snapshots_array;
gchar *old_manifest_file;
if(old_manifest == NULL)
old_manifest_file = determine_previous_manifest_file(coordinator_profile_path, profile);
else
old_manifest_file = g_strdup(old_manifest);
if(no_upgrade || old_manifest_file == NULL)
{
g_printerr("[coordinator]: Sending snapshots of all components...\n");
snapshots_array = manifest->snapshots_array;
}
else
{
GPtrArray *old_snapshots_array = create_snapshots_array(old_manifest_file, container_filter, component_filter);
g_printerr("[coordinator]: Snapshotting state of moved components...\n");
snapshots_array = subtract_snapshot_mappings(manifest->snapshots_array, old_snapshots_array);
delete_snapshots_array(old_snapshots_array);
}
if(send_snapshots(snapshots_array, manifest->target_array, max_concurrent_transfers, all) /* First, send the snapshots to the remote machines */
&& (transfer_only || restore_services(snapshots_array, manifest->target_array))) /* Then, restore them on the remote machines */
exit_status = 0;
else
exit_status = 1;
/* Cleanup */
g_free(old_manifest_file);
if(!no_upgrade && old_manifest_file != NULL)
g_ptr_array_free(snapshots_array, TRUE);
delete_manifest(manifest);
/* Return the exit status */
return exit_status;
}
}
Manifest *open_provided_or_previous_manifest_file(const gchar *manifest_file, const gchar *coordinator_profile_path, gchar *profile, const unsigned int flags, const gchar *container, const gchar *component)
{
if(manifest_file == NULL)
{
/* If no manifest file has been provided, try opening the last deployed one */
gchar *old_manifest_file = determine_previous_manifest_file(coordinator_profile_path, profile);
if(old_manifest_file == NULL)
return NULL; /* There is no previously deployed manifest */
else
{
/* Open the previously deployed manifest */
Manifest *manifest;
g_printerr("[coordinator]: Using previous manifest: %s\n", old_manifest_file);
manifest = create_manifest(old_manifest_file, flags, container, component);
g_free(old_manifest_file);
return manifest;
}
}
else
return create_manifest(manifest_file, flags, container, component); /* Open the provided manifest file */
}
int activate_system(const gchar *new_manifest, const gchar *old_manifest, const gchar *coordinator_profile_path, gchar *profile, const gboolean no_upgrade, const gboolean no_rollback, const gboolean dry_run)
{
Manifest *manifest = create_manifest(new_manifest, MANIFEST_ACTIVATION_FLAG, NULL, NULL);
if(manifest == NULL)
{
g_printerr("[coordinator]: Error opening manifest file!\n");
return 1;
}
else
{
TransitionStatus status;
gchar *old_manifest_file;
GPtrArray *old_activation_mappings;
/* If no previous configuration is given, check whether we have one in the coordinator profile, otherwise use the given one */
if(old_manifest == NULL)
old_manifest_file = determine_previous_manifest_file(coordinator_profile_path, profile);
else
old_manifest_file = g_strdup(old_manifest);
/* If we have an old configuration -> open it */
if(!no_upgrade && old_manifest_file != NULL)
{
g_print("[coordinator]: Doing an upgrade from previous manifest file: %s\n", old_manifest_file);
old_activation_mappings = create_activation_array(old_manifest_file);
}
else
{
g_print("[coordinator]: Doing an installation from scratch\n");
old_activation_mappings = NULL;
}
/* Override SIGINT's behaviour to allow stuff to be rollbacked in case of an interruption */
set_flag_on_interrupt();
/* Execute transition */
g_print("[coordinator]: Executing the transition to the new deployment state\n");
if((status = transition(manifest->activation_array, old_activation_mappings, manifest->target_array, no_rollback, dry_run)) == TRANSITION_SUCCESS)
g_printerr("[coordinator]: The new configuration has been successfully activated!\n");
else
{
g_printerr("[coordinator]: ERROR: Transition phase execution failed!\n");
if(old_manifest_file != NULL && status == TRANSITION_ROLLBACK_FAILED)
{
g_printerr("The rollback failed! This means the system is now inconsistent! Please\n");
g_printerr("manually diagnose the errors before doing another redeployment!\n\n");
g_printerr("When the problems have been solved, the rollback can be triggered again, by\n");
g_printerr("running:\n\n");
g_printerr("$ disnix-activate --no-rollback -p %s ", profile);
if(coordinator_profile_path != NULL)
g_printerr("--coordinator-profile-path %s ", coordinator_profile_path);
g_printerr("-o %s %s\n\n", new_manifest, old_manifest_file);
}
}
/* Cleanup */
g_free(old_manifest_file);
delete_manifest(manifest);
delete_activation_array(old_activation_mappings);
/* Return the transition status */
return status;
}
}
