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SUSE:SLE-12-SP3:Update
pacemaker.23975
pacemaker-pengine-messages-assigning-resources-...
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File pacemaker-pengine-messages-assigning-resources-to-nodes.patch of Package pacemaker.23975
commit c3f3cc04133cdf8f21167740951a033d81de6c61 Author: Ken Gaillot <kgaillot@redhat.com> Date: Tue Oct 17 16:37:41 2017 -0500 Log: pengine: improve messages when assigning resources to nodes Most significantly, native_choose_node() was off by one when counting equal-weighted nodes, so no message would be logged when there were two. This also refactors for efficiency and readability. The only behavioral change is that when comparing the chosen node against allowed nodes of equal weight, allowed nodes that can't run resources won't be counted. Index: pacemaker-1.1.16+20170320.77ea74d/pengine/clone.c =================================================================== --- pacemaker-1.1.16+20170320.77ea74d.orig/pengine/clone.c +++ pacemaker-1.1.16+20170320.77ea74d/pengine/clone.c @@ -379,7 +379,8 @@ can_run_instance(resource_t * rsc, node_ pe_rsc_trace(rsc, "%s cannot run on %s: Parent node weight doesn't allow it.", rsc->id, node->details->uname); } else if (local_node->count < clone_data->clone_node_max) { - pe_rsc_trace(rsc, "%s can run on %s: %d", rsc->id, node->details->uname, local_node->count); + pe_rsc_trace(rsc, "%s can run on %s (already running %d)", + rsc->id, node->details->uname, local_node->count); return local_node; } else { @@ -402,7 +403,9 @@ color_instance(resource_t * rsc, node_t GHashTable *backup = NULL; CRM_ASSERT(rsc); - pe_rsc_trace(rsc, "Processing %s %d", rsc->id, all_coloc); + pe_rsc_trace(rsc, "Checking allocation of %s (preferring %s, using %s parent colocations)", + rsc->id, (prefer? prefer->details->uname: "none"), + (all_coloc? "all" : "some")); if (is_not_set(rsc->flags, pe_rsc_provisional)) { return rsc->fns->location(rsc, NULL, FALSE); Index: pacemaker-1.1.16+20170320.77ea74d/pengine/native.c =================================================================== --- pacemaker-1.1.16+20170320.77ea74d.orig/pengine/native.c +++ pacemaker-1.1.16+20170320.77ea74d/pengine/native.c @@ -82,98 +82,106 @@ gboolean (*rsc_action_matrix[RSC_ROLE_MA static gboolean native_choose_node(resource_t * rsc, node_t * prefer, pe_working_set_t * data_set) { - /* - 1. Sort by weight - 2. color.chosen_node = the node (of those with the highest wieght) - with the fewest resources - 3. remove color.chosen_node from all other colors - */ GListPtr nodes = NULL; node_t *chosen = NULL; - - int lpc = 0; - int multiple = 0; + node_t *best = NULL; + int multiple = 1; int length = 0; gboolean result = FALSE; process_utilization(rsc, &prefer, data_set); - length = g_hash_table_size(rsc->allowed_nodes); - if (is_not_set(rsc->flags, pe_rsc_provisional)) { return rsc->allocated_to ? TRUE : FALSE; } - if(rsc->allowed_nodes) { + // Sort allowed nodes by weight + if (rsc->allowed_nodes) { + length = g_hash_table_size(rsc->allowed_nodes); + } + if (length > 0) { nodes = g_hash_table_get_values(rsc->allowed_nodes); - nodes = g_list_sort_with_data(nodes, sort_node_weight, g_list_nth_data(rsc->running_on, 0)); + nodes = g_list_sort_with_data(nodes, sort_node_weight, + g_list_nth_data(rsc->running_on, 0)); + + // First node in sorted list has the best score + best = g_list_nth_data(nodes, 0); } - if (prefer) { - node_t *best = g_list_nth_data(nodes, 0); + if (prefer && nodes) { chosen = g_hash_table_lookup(rsc->allowed_nodes, prefer->details->id); - if (chosen && chosen->weight >= 0 - && chosen->weight >= best->weight /* Possible alternative: (chosen->weight >= INFINITY || best->weight < INFINITY) */ - && can_run_resources(chosen)) { - pe_rsc_trace(rsc, - "Using preferred node %s for %s instead of choosing from %d candidates", - chosen->details->uname, rsc->id, length); - } else if (chosen && chosen->weight < 0) { - pe_rsc_trace(rsc, "Preferred node %s for %s was unavailable", chosen->details->uname, - rsc->id); + + if (chosen == NULL) { + pe_rsc_trace(rsc, "Preferred node %s for %s was unknown", + prefer->details->uname, rsc->id); + + /* Favor the preferred node as long as its weight is at least as good as + * the best allowed node's. + * + * An alternative would be to favor the preferred node even if the best + * node is better, when the best node's weight is less than INFINITY. + */ + } else if ((chosen->weight < 0) || (chosen->weight < best->weight)) { + pe_rsc_trace(rsc, "Preferred node %s for %s was unsuitable", + chosen->details->uname, rsc->id); chosen = NULL; - } else if (chosen && can_run_resources(chosen)) { - pe_rsc_trace(rsc, "Preferred node %s for %s was unsuitable", chosen->details->uname, - rsc->id); + + } else if (!can_run_resources(chosen)) { + pe_rsc_trace(rsc, "Preferred node %s for %s was unavailable", + chosen->details->uname, rsc->id); chosen = NULL; + } else { - pe_rsc_trace(rsc, "Preferred node %s for %s was unknown", prefer->details->uname, - rsc->id); + pe_rsc_trace(rsc, + "Chose preferred node %s for %s (ignoring %d candidates)", + chosen->details->uname, rsc->id, length); } } - if (chosen == NULL && rsc->allowed_nodes) { + if ((chosen == NULL) && nodes) { + /* Either there is no preferred node, or the preferred node is not + * available, but there are other nodes allowed to run the resource. + */ - chosen = g_list_nth_data(nodes, 0); + chosen = best; pe_rsc_trace(rsc, "Chose node %s for %s from %d candidates", chosen ? chosen->details->uname : "<none>", rsc->id, length); if (chosen && chosen->weight > 0 && can_run_resources(chosen)) { + /* If the resource is already running on a node, prefer that node if + * it is just as good as the chosen node. + */ node_t *running = g_list_nth_data(rsc->running_on, 0); - if (running && can_run_resources(running) == FALSE) { + if (running && (can_run_resources(running) == FALSE)) { pe_rsc_trace(rsc, "Current node for %s (%s) can't run resources", rsc->id, running->details->uname); - running = NULL; - } - - for (lpc = 1; lpc < length && running; lpc++) { - node_t *tmp = g_list_nth_data(nodes, lpc); - - if (tmp->weight == chosen->weight) { - multiple++; + } else if (running) { + for (GList *iter = nodes->next; iter; iter = iter->next) { + node_t *tmp = (node_t *) iter->data; + + if (tmp->weight != chosen->weight) { + // The nodes are sorted by weight, so no more are equal + break; + } if (tmp->details == running->details) { - /* prefer the existing node if scores are equal */ + // Scores are equal, so prefer the current node chosen = tmp; } + multiple++; } } } } if (multiple > 1) { - int log_level = LOG_INFO; static char score[33]; + int log_level = (chosen->weight >= INFINITY)? LOG_WARNING : LOG_INFO; score2char_stack(chosen->weight, score, sizeof(score)); - - if (chosen->weight >= INFINITY) { - log_level = LOG_WARNING; - } - - do_crm_log(log_level, "%d nodes with equal score (%s) for" - " running %s resources. Chose %s.", - multiple, score, rsc->id, chosen->details->uname); + do_crm_log(log_level, + "Chose node %s for %s from %d nodes with score %s", + chosen->details->uname, rsc->id, multiple, score); } result = native_assign_node(rsc, nodes, chosen, FALSE);
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