/*
* Copyright 2015-2020 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 <glib.h>
#include <unistd.h>
#include <crm/crm.h>
#include <crm/msg_xml.h>
#include <crm/services.h>
#include <crm/common/mainloop.h>
#include <crm/common/alerts_internal.h>
#include <crm/common/iso8601_internal.h>
#include <crm/lrmd_internal.h>
#include <crm/pengine/status.h>
#include <crm/cib.h>
#include <crm/lrmd.h>
static lrmd_key_value_t *
alert_key2param(lrmd_key_value_t *head, enum pcmk__alert_keys_e name,
const char *value)
{
const char **key;
if (value == NULL) {
value = "";
}
for (key = pcmk__alert_keys[name]; *key; key++) {
crm_trace("Setting alert key %s = '%s'", *key, value);
head = lrmd_key_value_add(head, *key, value);
}
return head;
}
static lrmd_key_value_t *
alert_key2param_int(lrmd_key_value_t *head, enum pcmk__alert_keys_e name,
int value)
{
char *value_s = crm_itoa(value);
head = alert_key2param(head, name, value_s);
free(value_s);
return head;
}
static lrmd_key_value_t *
alert_key2param_ms(lrmd_key_value_t *head, enum pcmk__alert_keys_e name,
guint value)
{
char *value_s = crm_strdup_printf("%u", value);
head = alert_key2param(head, name, value_s);
free(value_s);
return head;
}
static void
set_ev_kv(gpointer key, gpointer value, gpointer user_data)
{
lrmd_key_value_t **head = (lrmd_key_value_t **) user_data;
if (value) {
crm_trace("Setting environment variable %s='%s'",
(char*)key, (char*)value);
*head = lrmd_key_value_add(*head, key, value);
}
}
static lrmd_key_value_t *
alert_envvar2params(lrmd_key_value_t *head, pcmk__alert_t *entry)
{
if (entry->envvars) {
g_hash_table_foreach(entry->envvars, set_ev_kv, &head);
}
return head;
}
/*
* We could use g_strv_contains() instead of this function,
* but that has only been available since glib 2.43.2.
*/
static gboolean
is_target_alert(char **list, const char *value)
{
int target_list_num = 0;
gboolean rc = FALSE;
CRM_CHECK(value != NULL, return FALSE);
if (list == NULL) {
return TRUE;
}
target_list_num = g_strv_length(list);
for (int cnt = 0; cnt < target_list_num; cnt++) {
if (strcmp(list[cnt], value) == 0) {
rc = TRUE;
break;
}
}
return rc;
}
/*!
* \internal
* \brief Execute alert agents for an event
*
* \param[in] lrmd Executor connection to use
* \param[in] alert_list Alerts to execute
* \param[in] kind Type of event that is being alerted for
* \param[in] attr_name If pcmk__alert_attribute, the attribute name
* \param[in,out] params Environment variables to pass to agents
*
* \retval pcmk_ok on success
* \retval -1 if some alerts failed
* \retval -2 if all alerts failed
*/
static int
exec_alert_list(lrmd_t *lrmd, GList *alert_list, enum pcmk__alert_flags kind,
const char *attr_name, lrmd_key_value_t *params)
{
bool any_success = FALSE, any_failure = FALSE;
const char *kind_s = pcmk__alert_flag2text(kind);
pcmk__time_hr_t *now = NULL;
struct timeval tv_now;
char timestamp_epoch[20];
char timestamp_usec[7];
params = alert_key2param(params, PCMK__alert_key_kind, kind_s);
params = alert_key2param(params, PCMK__alert_key_version, VERSION);
for (GList *iter = g_list_first(alert_list); iter; iter = g_list_next(iter)) {
pcmk__alert_t *entry = (pcmk__alert_t *)(iter->data);
lrmd_key_value_t *copy_params = NULL;
lrmd_key_value_t *head = NULL;
int rc;
if (!pcmk_is_set(entry->flags, kind)) {
crm_trace("Filtering unwanted %s alert to %s via %s",
kind_s, entry->recipient, entry->id);
continue;
}
if ((kind == pcmk__alert_attribute)
&& !is_target_alert(entry->select_attribute_name, attr_name)) {
crm_trace("Filtering unwanted attribute '%s' alert to %s via %s",
attr_name, entry->recipient, entry->id);
continue;
}
if (now == NULL) {
if (gettimeofday(&tv_now, NULL) == 0) {
now = pcmk__time_timeval_hr_convert(NULL, &tv_now);
}
}
crm_info("Sending %s alert via %s to %s",
kind_s, entry->id, entry->recipient);
/* Make a copy of the parameters, because each alert will be unique */
for (head = params; head != NULL; head = head->next) {
copy_params = lrmd_key_value_add(copy_params, head->key, head->value);
}
copy_params = alert_key2param(copy_params, PCMK__alert_key_recipient,
entry->recipient);
if (now) {
char *timestamp = pcmk__time_format_hr(entry->tstamp_format, now);
if (timestamp) {
copy_params = alert_key2param(copy_params,
PCMK__alert_key_timestamp,
timestamp);
free(timestamp);
}
snprintf(timestamp_epoch, sizeof(timestamp_epoch), "%lld",
(long long) tv_now.tv_sec);
copy_params = alert_key2param(copy_params,
PCMK__alert_key_timestamp_epoch,
timestamp_epoch);
snprintf(timestamp_usec, sizeof(timestamp_usec), "%06d", now->useconds);
copy_params = alert_key2param(copy_params,
PCMK__alert_key_timestamp_usec,
timestamp_usec);
}
copy_params = alert_envvar2params(copy_params, entry);
rc = lrmd->cmds->exec_alert(lrmd, entry->id, entry->path,
entry->timeout, copy_params);
if (rc < 0) {
crm_err("Could not execute alert %s: %s " CRM_XS " rc=%d",
entry->id, pcmk_strerror(rc), rc);
any_failure = TRUE;
} else {
any_success = TRUE;
}
}
if (now) {
free(now);
}
if (any_failure) {
return (any_success? -1 : -2);
}
return pcmk_ok;
}
/*!
* \internal
* \brief Send an alert for a node attribute change
*
* \param[in] lrmd Executor connection to use
* \param[in] alert_list List of alert agents to execute
* \param[in] node Name of node with attribute change
* \param[in] nodeid Node ID of node with attribute change
* \param[in] attr_name Name of attribute that changed
* \param[in] attr_value New value of attribute that changed
*
* \retval pcmk_ok on success
* \retval -1 if some alert agents failed
* \retval -2 if all alert agents failed
*/
int
lrmd_send_attribute_alert(lrmd_t *lrmd, GList *alert_list,
const char *node, uint32_t nodeid,
const char *attr_name, const char *attr_value)
{
int rc = pcmk_ok;
lrmd_key_value_t *params = NULL;
if (lrmd == NULL) {
return -2;
}
params = alert_key2param(params, PCMK__alert_key_node, node);
params = alert_key2param_int(params, PCMK__alert_key_nodeid, nodeid);
params = alert_key2param(params, PCMK__alert_key_attribute_name, attr_name);
params = alert_key2param(params, PCMK__alert_key_attribute_value,
attr_value);
rc = exec_alert_list(lrmd, alert_list, pcmk__alert_attribute, attr_name,
params);
lrmd_key_value_freeall(params);
return rc;
}
/*!
* \internal
* \brief Send an alert for a node membership event
*
* \param[in] lrmd Executor connection to use
* \param[in] alert_list List of alert agents to execute
* \param[in] node Name of node with change
* \param[in] nodeid Node ID of node with change
* \param[in] state New state of node with change
*
* \retval pcmk_ok on success
* \retval -1 if some alert agents failed
* \retval -2 if all alert agents failed
*/
int
lrmd_send_node_alert(lrmd_t *lrmd, GList *alert_list,
const char *node, uint32_t nodeid, const char *state)
{
int rc = pcmk_ok;
lrmd_key_value_t *params = NULL;
if (lrmd == NULL) {
return -2;
}
params = alert_key2param(params, PCMK__alert_key_node, node);
params = alert_key2param(params, PCMK__alert_key_desc, state);
params = alert_key2param_int(params, PCMK__alert_key_nodeid, nodeid);
rc = exec_alert_list(lrmd, alert_list, pcmk__alert_node, NULL, params);
lrmd_key_value_freeall(params);
return rc;
}
/*!
* \internal
* \brief Send an alert for a fencing event
*
* \param[in] lrmd Executor connection to use
* \param[in] alert_list List of alert agents to execute
* \param[in] target Name of fence target node
* \param[in] task Type of fencing event that occurred
* \param[in] desc Readable description of event
* \param[in] op_rc Result of fence action
*
* \retval pcmk_ok on success
* \retval -1 if some alert agents failed
* \retval -2 if all alert agents failed
*/
int
lrmd_send_fencing_alert(lrmd_t *lrmd, GList *alert_list,
const char *target, const char *task, const char *desc,
int op_rc)
{
int rc = pcmk_ok;
lrmd_key_value_t *params = NULL;
if (lrmd == NULL) {
return -2;
}
params = alert_key2param(params, PCMK__alert_key_node, target);
params = alert_key2param(params, PCMK__alert_key_task, task);
params = alert_key2param(params, PCMK__alert_key_desc, desc);
params = alert_key2param_int(params, PCMK__alert_key_rc, op_rc);
rc = exec_alert_list(lrmd, alert_list, pcmk__alert_fencing, NULL, params);
lrmd_key_value_freeall(params);
return rc;
}
/*!
* \internal
* \brief Send an alert for a resource operation
*
* \param[in] lrmd Executor connection to use
* \param[in] alert_list List of alert agents to execute
* \param[in] node Name of node that executed operation
* \param[in] op Resource operation
*
* \retval pcmk_ok on success
* \retval -1 if some alert agents failed
* \retval -2 if all alert agents failed
*/
int
lrmd_send_resource_alert(lrmd_t *lrmd, GList *alert_list,
const char *node, lrmd_event_data_t *op)
{
int rc = pcmk_ok;
int target_rc = pcmk_ok;
lrmd_key_value_t *params = NULL;
if (lrmd == NULL) {
return -2;
}
target_rc = rsc_op_expected_rc(op);
if ((op->interval_ms == 0) && (target_rc == op->rc)
&& pcmk__str_eq(op->op_type, RSC_STATUS, pcmk__str_casei)) {
/* Don't send alerts for probes with the expected result. Leave it up to
* the agent whether to alert for 'failed' probes. (Even if we find a
* resource running, it was probably because someone did a clean-up of
* the status section.)
*/
return pcmk_ok;
}
params = alert_key2param(params, PCMK__alert_key_node, node);
params = alert_key2param(params, PCMK__alert_key_rsc, op->rsc_id);
params = alert_key2param(params, PCMK__alert_key_task, op->op_type);
params = alert_key2param_ms(params, PCMK__alert_key_interval,
op->interval_ms);
params = alert_key2param_int(params, PCMK__alert_key_target_rc, target_rc);
params = alert_key2param_int(params, PCMK__alert_key_status, op->op_status);
params = alert_key2param_int(params, PCMK__alert_key_rc, op->rc);
/* Reoccurring operations do not set exec_time, so on timeout, set it
* to the operation timeout since that's closer to the actual value.
*/
if (op->op_status == PCMK_LRM_OP_TIMEOUT && op->exec_time == 0) {
params = alert_key2param_int(params, PCMK__alert_key_exec_time,
op->timeout);
} else {
params = alert_key2param_int(params, PCMK__alert_key_exec_time,
op->exec_time);
}
if (op->op_status == PCMK_LRM_OP_DONE) {
params = alert_key2param(params, PCMK__alert_key_desc,
services_ocf_exitcode_str(op->rc));
} else {
params = alert_key2param(params, PCMK__alert_key_desc,
services_lrm_status_str(op->op_status));
}
rc = exec_alert_list(lrmd, alert_list, pcmk__alert_resource, NULL, params);
lrmd_key_value_freeall(params);
return rc;
}