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pe_health.c
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/*
* Copyright 2004-2023 the Pacemaker project contributors
*
* The version control history for this file may have further details.
*
* This source code is licensed under the GNU Lesser General Public License
* version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
*/
#include <crm_internal.h>
#include <crm/pengine/status.h>
#include <crm/pengine/internal.h>
#include "pe_status_private.h"
/*!
* \internal
* \brief Set the node health values to use for "red", "yellow", and "green"
*
* \param[in,out] scheduler Scheduler data
*/
void
pe__unpack_node_health_scores(pcmk_scheduler_t *scheduler)
{
switch (pe__health_strategy(scheduler)) {
case pcmk__health_strategy_none:
pcmk__score_red = 0;
pcmk__score_yellow = 0;
pcmk__score_green = 0;
break;
case pcmk__health_strategy_no_red:
pcmk__score_red = -INFINITY;
pcmk__score_yellow = 0;
pcmk__score_green = 0;
break;
case pcmk__health_strategy_only_green:
pcmk__score_red = -INFINITY;
pcmk__score_yellow = -INFINITY;
pcmk__score_green = 0;
break;
default: // progressive or custom
pcmk__score_red = pe__health_score(PCMK__OPT_NODE_HEALTH_RED,
scheduler);
pcmk__score_green = pe__health_score(PCMK__OPT_NODE_HEALTH_GREEN,
scheduler);
pcmk__score_yellow = pe__health_score(PCMK__OPT_NODE_HEALTH_YELLOW,
scheduler);
break;
}
if ((pcmk__score_red != 0) || (pcmk__score_yellow != 0)
|| (pcmk__score_green != 0)) {
crm_debug("Values of node health scores: "
PCMK__VALUE_RED "=%d "
PCMK__VALUE_YELLOW "=%d "
PCMK__VALUE_GREEN "=%d",
pcmk__score_red, pcmk__score_yellow, pcmk__score_green);
}
}
/*!
* \internal
* \brief Add node attribute value to an integer, if it is a health attribute
*
* \param[in] key Name of node attribute
* \param[in] value String value of node attribute
* \param[in,out] user_data Address of integer to which \p value should be
* added if \p key is a node health attribute
*/
static void
add_node_health_value(gpointer key, gpointer value, gpointer user_data)
{
if (pcmk__starts_with((const char *) key, "#health")) {
int score = char2score((const char *) value);
int *health = (int *) user_data;
*health = pcmk__add_scores(score, *health);
crm_trace("Combined '%s' into node health score (now %s)",
(const char *) value, pcmk_readable_score(*health));
}
}
/*!
* \internal
* \brief Sum a node's health attribute scores
*
* \param[in] node Node whose health attributes should be added
* \param[in] base_health Add this number to the total
*
* \return Sum of all health attribute scores of \p node plus \p base_health
*/
int
pe__sum_node_health_scores(const pcmk_node_t *node, int base_health)
{
CRM_ASSERT(node != NULL);
g_hash_table_foreach(node->details->attrs, add_node_health_value,
&base_health);
return base_health;
}
/*!
* \internal
* \brief Check the general health status for a node
*
* \param[in,out] node Node to check
*
* \return A negative value if any health attribute for \p node is red,
* otherwise 0 if any attribute is yellow, otherwise a positive value.
*/
int
pe__node_health(pcmk_node_t *node)
{
GHashTableIter iter;
const char *name = NULL;
const char *value = NULL;
enum pcmk__health_strategy strategy;
int score = 0;
int rc = 1;
CRM_ASSERT(node != NULL);
strategy = pe__health_strategy(node->details->data_set);
if (strategy == pcmk__health_strategy_none) {
return rc;
}
g_hash_table_iter_init(&iter, node->details->attrs);
while (g_hash_table_iter_next(&iter, (gpointer *) &name,
(gpointer *) &value)) {
if (pcmk__starts_with(name, "#health")) {
/* It's possible that pcmk__score_red equals pcmk__score_yellow,
* or pcmk__score_yellow equals pcmk__score_green, so check the
* textual value first to be able to distinguish those.
*/
if (pcmk__str_eq(value, PCMK__VALUE_RED, pcmk__str_casei)) {
return -1;
} else if (pcmk__str_eq(value, PCMK__VALUE_YELLOW,
pcmk__str_casei)) {
rc = 0;
continue;
}
// The value is an integer, so compare numerically
score = char2score(value);
if (score <= pcmk__score_red) {
return -1;
} else if ((score <= pcmk__score_yellow)
&& (pcmk__score_yellow != pcmk__score_green)) {
rc = 0;
}
}
}
return rc;
}

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