**/
#include "collectd.h"
+
#include "common.h"
#include "plugin.h"
-#include "configfile.h"
-
-#include <pthread.h>
-#include <credis.h>
-#ifndef HOST_NAME_MAX
-# define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
-#endif
+#include <hiredis/hiredis.h>
+#include <sys/time.h>
-#define REDIS_DEF_HOST "localhost"
+#define REDIS_DEF_HOST "localhost"
#define REDIS_DEF_PASSWD ""
-#define REDIS_DEF_PORT 6379
-#define REDIS_DEF_TIMEOUT 2000
-#define MAX_REDIS_NODE_NAME 64
+#define REDIS_DEF_PORT 6379
+#define REDIS_DEF_TIMEOUT_SEC 2
+#define REDIS_DEF_DB_COUNT 256
+#define MAX_REDIS_VAL_SIZE 256
+#define MAX_REDIS_QUERY 2048
/* Redis plugin configuration example:
*
* <Node "mynode">
* Host "localhost"
* Port "6379"
- * Timeout 2000
+ * Timeout 2
+ * Password "foobar"
* </Node>
* </Plugin>
*/
+struct redis_query_s;
+typedef struct redis_query_s redis_query_t;
+struct redis_query_s {
+ char query[MAX_REDIS_QUERY];
+ char type[DATA_MAX_NAME_LEN];
+ char instance[DATA_MAX_NAME_LEN];
+ int database;
+
+ redis_query_t *next;
+};
+
+struct prev_s {
+ derive_t keyspace_hits;
+ derive_t keyspace_misses;
+};
+typedef struct prev_s prev_t;
+
struct redis_node_s;
typedef struct redis_node_s redis_node_t;
-struct redis_node_s
-{
- char name[MAX_REDIS_NODE_NAME];
- char host[HOST_NAME_MAX];
- char passwd[HOST_NAME_MAX];
+struct redis_node_s {
+ char *name;
+ char *host;
+ char *passwd;
int port;
- int timeout;
+ struct timeval timeout;
+ bool report_command_stats;
+ bool report_cpu_usage;
+ redisContext *redisContext;
+ redis_query_t *queries;
+ prev_t prev;
redis_node_t *next;
};
-static redis_node_t *nodes_head = NULL;
+static bool redis_have_instances;
+static int redis_read(user_data_t *user_data);
+
+static void redis_node_free(void *arg) {
+ redis_node_t *rn = arg;
+ if (rn == NULL)
+ return;
+
+ redis_query_t *rq = rn->queries;
+ while (rq != NULL) {
+ redis_query_t *next = rq->next;
+ sfree(rq);
+ rq = next;
+ }
+
+ redisFree(rn->redisContext);
+ sfree(rn->name);
+ sfree(rn->host);
+ sfree(rn->passwd);
+ sfree(rn);
+} /* void redis_node_free */
-static int redis_node_add (const redis_node_t *rn) /* {{{ */
+static int redis_node_add(redis_node_t *rn) /* {{{ */
{
- redis_node_t *rn_copy;
- redis_node_t *rn_ptr;
+ DEBUG("redis plugin: Adding node \"%s\".", rn->name);
+
+ /* Disable automatic generation of default instance in the init callback. */
+ redis_have_instances = true;
+
+ char cb_name[sizeof("redis/") + DATA_MAX_NAME_LEN];
+ snprintf(cb_name, sizeof(cb_name), "redis/%s", rn->name);
+
+ return plugin_register_complex_read(
+ /* group = */ "redis",
+ /* name = */ cb_name,
+ /* callback = */ redis_read,
+ /* interval = */ 0,
+ &(user_data_t){
+ .data = rn, .free_func = redis_node_free,
+ });
+} /* }}} */
- /* Check for duplicates first */
- for (rn_ptr = nodes_head; rn_ptr != NULL; rn_ptr = rn_ptr->next)
- if (strcmp (rn->name, rn_ptr->name) == 0)
- break;
+static redis_query_t *redis_config_query(oconfig_item_t *ci) /* {{{ */
+{
+ redis_query_t *rq;
+ int status;
- if (rn_ptr != NULL)
- {
- ERROR ("redis plugin: A node with the name `%s' already exists.",
- rn->name);
- return (-1);
+ rq = calloc(1, sizeof(*rq));
+ if (rq == NULL) {
+ ERROR("redis plugin: calloc failed adding redis_query.");
+ return NULL;
}
+ status = cf_util_get_string_buffer(ci, rq->query, sizeof(rq->query));
+ if (status != 0)
+ goto err;
- rn_copy = malloc (sizeof (*rn_copy));
- if (rn_copy == NULL)
- {
- ERROR ("redis plugin: malloc failed adding redis_node to the tree.");
- return (-1);
- }
+ /*
+ * Default to a gauge type.
+ */
+ (void)strncpy(rq->type, "gauge", sizeof(rq->type));
+ (void)sstrncpy(rq->instance, rq->query, sizeof(rq->instance));
+ replace_special(rq->instance, sizeof(rq->instance));
- memcpy (rn_copy, rn, sizeof (*rn_copy));
- rn_copy->next = NULL;
+ rq->database = 0;
- DEBUG ("redis plugin: Adding node \"%s\".", rn->name);
+ for (int i = 0; i < ci->children_num; i++) {
+ oconfig_item_t *option = ci->children + i;
- if (nodes_head == NULL)
- nodes_head = rn_copy;
- else
- {
- rn_ptr = nodes_head;
- while (rn_ptr->next != NULL)
- rn_ptr = rn_ptr->next;
- rn_ptr->next = rn_copy;
+ if (strcasecmp("Type", option->key) == 0) {
+ status = cf_util_get_string_buffer(option, rq->type, sizeof(rq->type));
+ } else if (strcasecmp("Instance", option->key) == 0) {
+ status =
+ cf_util_get_string_buffer(option, rq->instance, sizeof(rq->instance));
+ } else if (strcasecmp("Database", option->key) == 0) {
+ status = cf_util_get_int(option, &rq->database);
+ if (rq->database < 0) {
+ WARNING("redis plugin: The \"Database\" option must be positive "
+ "integer or zero");
+ status = -1;
+ }
+ } else {
+ WARNING("redis plugin: unknown configuration option: %s", option->key);
+ status = -1;
+ }
+ if (status != 0)
+ goto err;
}
-
- return (0);
+ return rq;
+err:
+ free(rq);
+ return NULL;
} /* }}} */
-static int redis_config_node (oconfig_item_t *ci) /* {{{ */
+static int redis_config_node(oconfig_item_t *ci) /* {{{ */
{
- redis_node_t rn;
- int i;
- int status;
+ redis_node_t *rn = calloc(1, sizeof(*rn));
+ if (rn == NULL) {
+ ERROR("redis plugin: calloc failed adding node.");
+ return ENOMEM;
+ }
- memset (&rn, 0, sizeof (rn));
- sstrncpy (rn.host, REDIS_DEF_HOST, sizeof (rn.host));
- rn.port = REDIS_DEF_PORT;
- rn.timeout = REDIS_DEF_TIMEOUT;
+ rn->port = REDIS_DEF_PORT;
+ rn->timeout.tv_sec = REDIS_DEF_TIMEOUT_SEC;
+ rn->report_cpu_usage = true;
- status = cf_util_get_string_buffer (ci, rn.name, sizeof (rn.name));
- if (status != 0)
- return (status);
+ rn->host = strdup(REDIS_DEF_HOST);
+ if (rn->host == NULL) {
+ ERROR("redis plugin: strdup failed adding node.");
+ sfree(rn);
+ return ENOMEM;
+ }
- for (i = 0; i < ci->children_num; i++)
- {
+ int status = cf_util_get_string(ci, &rn->name);
+ if (status != 0) {
+ sfree(rn->host);
+ sfree(rn);
+ return status;
+ }
+
+ for (int i = 0; i < ci->children_num; i++) {
oconfig_item_t *option = ci->children + i;
- if (strcasecmp ("Host", option->key) == 0)
- status = cf_util_get_string_buffer (option, rn.host, sizeof (rn.host));
- else if (strcasecmp ("Port", option->key) == 0)
- {
- status = cf_util_get_port_number (option);
- if (status > 0)
- {
- rn.port = status;
+ if (strcasecmp("Host", option->key) == 0)
+ status = cf_util_get_string(option, &rn->host);
+ else if (strcasecmp("Port", option->key) == 0) {
+ status = cf_util_get_port_number(option);
+ if (status > 0) {
+ rn->port = status;
status = 0;
}
- }
- else if (strcasecmp ("Timeout", option->key) == 0)
- status = cf_util_get_int (option, &rn.timeout);
- else if (strcasecmp ("Password", option->key) == 0)
- status = cf_util_get_string_buffer (option, rn.passwd, sizeof (rn.passwd));
+ } else if (strcasecmp("Query", option->key) == 0) {
+ redis_query_t *rq = redis_config_query(option);
+ if (rq == NULL) {
+ status = 1;
+ } else {
+ rq->next = rn->queries;
+ rn->queries = rq;
+ }
+ } else if (strcasecmp("Timeout", option->key) == 0) {
+ int timeout;
+ status = cf_util_get_int(option, &timeout);
+ if (status == 0) {
+ rn->timeout.tv_usec = timeout * 1000;
+ rn->timeout.tv_sec = rn->timeout.tv_usec / 1000000L;
+ rn->timeout.tv_usec %= 1000000L;
+ }
+ } else if (strcasecmp("Password", option->key) == 0)
+ status = cf_util_get_string(option, &rn->passwd);
+ else if (strcasecmp("ReportCommandStats", option->key) == 0)
+ status = cf_util_get_boolean(option, &rn->report_command_stats);
+ else if (strcasecmp("ReportCpuUsage", option->key) == 0)
+ status = cf_util_get_boolean(option, &rn->report_cpu_usage);
else
- WARNING ("redis plugin: Option `%s' not allowed inside a `Node' "
- "block. I'll ignore this option.", option->key);
+ WARNING("redis plugin: Option `%s' not allowed inside a `Node' "
+ "block. I'll ignore this option.",
+ option->key);
if (status != 0)
break;
}
- if (status != 0)
- return (status);
+ if (status != 0) {
+ redis_node_free(rn);
+ return status;
+ }
- return (redis_node_add (&rn));
+ return redis_node_add(rn);
} /* }}} int redis_config_node */
-static int redis_config (oconfig_item_t *ci) /* {{{ */
+static int redis_config(oconfig_item_t *ci) /* {{{ */
{
- int i;
-
- for (i = 0; i < ci->children_num; i++)
- {
+ for (int i = 0; i < ci->children_num; i++) {
oconfig_item_t *option = ci->children + i;
- if (strcasecmp ("Node", option->key) == 0)
- redis_config_node (option);
+ if (strcasecmp("Node", option->key) == 0)
+ redis_config_node(option);
else
- WARNING ("redis plugin: Option `%s' not allowed in redis"
- " configuration. It will be ignored.", option->key);
+ WARNING("redis plugin: Option `%s' not allowed in redis"
+ " configuration. It will be ignored.",
+ option->key);
}
- if (nodes_head == NULL)
- {
- ERROR ("redis plugin: No valid node configuration could be found.");
- return (ENOENT);
- }
-
- return (0);
+ return 0;
} /* }}} */
- __attribute__ ((nonnull(2)))
-static void redis_submit_g (char *plugin_instance,
- const char *type, const char *type_instance,
- gauge_t value) /* {{{ */
+__attribute__((nonnull(2))) static void
+redis_submit(const char *plugin_instance, const char *type,
+ const char *type_instance, value_t value) /* {{{ */
{
- value_t values[1];
value_list_t vl = VALUE_LIST_INIT;
- values[0].gauge = value;
-
- vl.values = values;
+ vl.values = &value;
vl.values_len = 1;
- sstrncpy (vl.host, hostname_g, sizeof (vl.host));
- sstrncpy (vl.plugin, "redis", sizeof (vl.plugin));
+ sstrncpy(vl.plugin, "redis", sizeof(vl.plugin));
if (plugin_instance != NULL)
- sstrncpy (vl.plugin_instance, plugin_instance,
- sizeof (vl.plugin_instance));
- sstrncpy (vl.type, type, sizeof (vl.type));
+ sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
+ sstrncpy(vl.type, type, sizeof(vl.type));
if (type_instance != NULL)
- sstrncpy (vl.type_instance, type_instance,
- sizeof (vl.type_instance));
+ sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
- plugin_dispatch_values (&vl);
+ plugin_dispatch_values(&vl);
} /* }}} */
- __attribute__ ((nonnull(2)))
-static void redis_submit_d (char *plugin_instance,
- const char *type, const char *type_instance,
- derive_t value) /* {{{ */
+__attribute__((nonnull(2))) static void
+redis_submit2(const char *plugin_instance, const char *type,
+ const char *type_instance, value_t value0,
+ value_t value1) /* {{{ */
{
- value_t values[1];
value_list_t vl = VALUE_LIST_INIT;
-
- values[0].derive = value;
+ value_t values[] = {value0, value1};
vl.values = values;
- vl.values_len = 1;
- sstrncpy (vl.host, hostname_g, sizeof (vl.host));
- sstrncpy (vl.plugin, "redis", sizeof (vl.plugin));
+ vl.values_len = STATIC_ARRAY_SIZE(values);
+
+ sstrncpy(vl.plugin, "redis", sizeof(vl.plugin));
+ sstrncpy(vl.type, type, sizeof(vl.type));
+
if (plugin_instance != NULL)
- sstrncpy (vl.plugin_instance, plugin_instance,
- sizeof (vl.plugin_instance));
- sstrncpy (vl.type, type, sizeof (vl.type));
+ sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
+
if (type_instance != NULL)
- sstrncpy (vl.type_instance, type_instance,
- sizeof (vl.type_instance));
+ sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
- plugin_dispatch_values (&vl);
+ plugin_dispatch_values(&vl);
} /* }}} */
-static int redis_init (void) /* {{{ */
+static int redis_init(void) /* {{{ */
{
- redis_node_t rn = { "default", REDIS_DEF_HOST, REDIS_DEF_PASSWD,
- REDIS_DEF_PORT, REDIS_DEF_TIMEOUT, /* next = */ NULL };
+ if (redis_have_instances)
+ return 0;
- if (nodes_head == NULL)
- redis_node_add (&rn);
+ redis_node_t *rn = calloc(1, sizeof(*rn));
+ if (rn == NULL)
+ return ENOMEM;
- return (0);
+ rn->port = REDIS_DEF_PORT;
+ rn->timeout.tv_sec = REDIS_DEF_TIMEOUT_SEC;
+
+ rn->name = strdup("default");
+ rn->host = strdup(REDIS_DEF_HOST);
+
+ if (rn->name == NULL || rn->host == NULL) {
+ sfree(rn->name);
+ sfree(rn->host);
+ sfree(rn);
+ return ENOMEM;
+ }
+
+ return redis_node_add(rn);
} /* }}} int redis_init */
-static int redis_read (void) /* {{{ */
+static void *c_redisCommand(redis_node_t *rn, const char *format, ...) {
+ redisContext *c = rn->redisContext;
+
+ if (c == NULL)
+ return NULL;
+
+ va_list ap;
+ va_start(ap, format);
+ void *reply = redisvCommand(c, format, ap);
+ va_end(ap);
+
+ if (reply == NULL) {
+ ERROR("redis plugin: Connection error: %s", c->errstr);
+ redisFree(rn->redisContext);
+ rn->redisContext = NULL;
+ }
+
+ return reply;
+} /* void c_redisCommand */
+
+static int redis_get_info_value(char const *info_line, char const *field_name,
+ int ds_type, value_t *val) {
+ char *str = strstr(info_line, field_name);
+ static char buf[MAX_REDIS_VAL_SIZE];
+ if (str) {
+ int i;
+
+ str += strlen(field_name) + 1; /* also skip the ':' */
+ for (i = 0; (*str && (isdigit((unsigned char)*str) || *str == '.'));
+ i++, str++)
+ buf[i] = *str;
+ buf[i] = '\0';
+
+ if (parse_value(buf, val, ds_type) == -1) {
+ WARNING("redis plugin: Unable to parse field `%s'.", field_name);
+ return -1;
+ }
+
+ return 0;
+ }
+ return -1;
+} /* int redis_get_info_value */
+
+static int redis_handle_info(char *node, char const *info_line,
+ char const *type, char const *type_instance,
+ char const *field_name, int ds_type) /* {{{ */
{
- redis_node_t *rn;
+ value_t val;
+ if (redis_get_info_value(info_line, field_name, ds_type, &val) != 0)
+ return -1;
- for (rn = nodes_head; rn != NULL; rn = rn->next)
- {
- REDIS rh;
- REDIS_INFO info;
+ redis_submit(node, type, type_instance, val);
+ return 0;
+} /* }}} int redis_handle_info */
- int status;
+static int redis_handle_query(redis_node_t *rn, redis_query_t *rq) /* {{{ */
+{
+ redisReply *rr;
+ const data_set_t *ds;
+ value_t val;
+
+ ds = plugin_get_ds(rq->type);
+ if (!ds) {
+ ERROR("redis plugin: DS type `%s' not defined.", rq->type);
+ return -1;
+ }
+
+ if (ds->ds_num != 1) {
+ ERROR("redis plugin: DS type `%s' has too many datasources. This is not "
+ "supported currently.",
+ rq->type);
+ return -1;
+ }
+
+ if ((rr = c_redisCommand(rn, "SELECT %d", rq->database)) == NULL) {
+ WARNING("redis plugin: unable to switch to database `%d' on node `%s'.",
+ rq->database, rn->name);
+ return -1;
+ }
- DEBUG ("redis plugin: querying info from node `%s' (%s:%d).", rn->name, rn->host, rn->port);
+ if ((rr = c_redisCommand(rn, rq->query)) == NULL) {
+ WARNING("redis plugin: unable to carry out query `%s'.", rq->query);
+ return -1;
+ }
- rh = credis_connect (rn->host, rn->port, rn->timeout);
- if (rh == NULL)
- {
- ERROR ("redis plugin: unable to connect to node `%s' (%s:%d).", rn->name, rn->host, rn->port);
+ switch (rr->type) {
+ case REDIS_REPLY_INTEGER:
+ switch (ds->ds[0].type) {
+ case DS_TYPE_COUNTER:
+ val.counter = (counter_t)rr->integer;
+ break;
+ case DS_TYPE_GAUGE:
+ val.gauge = (gauge_t)rr->integer;
+ break;
+ case DS_TYPE_DERIVE:
+ val.gauge = (derive_t)rr->integer;
+ break;
+ case DS_TYPE_ABSOLUTE:
+ val.gauge = (absolute_t)rr->integer;
+ break;
+ }
+ break;
+ case REDIS_REPLY_STRING:
+ if (parse_value(rr->str, &val, ds->ds[0].type) == -1) {
+ WARNING("redis plugin: Query `%s': Unable to parse value.", rq->query);
+ freeReplyObject(rr);
+ return -1;
+ }
+ break;
+ case REDIS_REPLY_ERROR:
+ WARNING("redis plugin: Query `%s' failed: %s.", rq->query, rr->str);
+ freeReplyObject(rr);
+ return -1;
+ case REDIS_REPLY_ARRAY:
+ WARNING("redis plugin: Query `%s' should return string or integer. Arrays "
+ "are not supported.",
+ rq->query);
+ freeReplyObject(rr);
+ return -1;
+ default:
+ WARNING("redis plugin: Query `%s': Cannot coerce redis type (%i).",
+ rq->query, rr->type);
+ freeReplyObject(rr);
+ return -1;
+ }
+
+ redis_submit(rn->name, rq->type,
+ (strlen(rq->instance) > 0) ? rq->instance : NULL, val);
+ freeReplyObject(rr);
+ return 0;
+} /* }}} int redis_handle_query */
+
+static int redis_db_stats(const char *node, char const *info_line) /* {{{ */
+{
+ /* redis_db_stats parses and dispatches Redis database statistics,
+ * currently the number of keys for each database.
+ * info_line needs to have the following format:
+ * db0:keys=4,expires=0,avg_ttl=0
+ */
+
+ for (int db = 0; db < REDIS_DEF_DB_COUNT; db++) {
+ static char buf[MAX_REDIS_VAL_SIZE];
+ static char field_name[12];
+ static char db_id[4];
+ value_t val;
+ char *str;
+ int i;
+
+ snprintf(field_name, sizeof(field_name), "db%d:keys=", db);
+
+ str = strstr(info_line, field_name);
+ if (!str)
continue;
+
+ str += strlen(field_name);
+ for (i = 0; (*str && isdigit((int)*str)); i++, str++)
+ buf[i] = *str;
+ buf[i] = '\0';
+
+ if (parse_value(buf, &val, DS_TYPE_GAUGE) != 0) {
+ WARNING("redis plugin: Unable to parse field `%s'.", field_name);
+ return -1;
}
- if (strlen (rn->passwd) > 0)
- {
- DEBUG ("redis plugin: authenticanting node `%s' passwd(%s).", rn->name, rn->passwd);
- status = credis_auth(rh, rn->passwd);
- if (status != 0)
- {
- WARNING ("redis plugin: unable to authenticate on node `%s'.", rn->name);
- credis_close (rh);
- continue;
- }
+ snprintf(db_id, sizeof(db_id), "%d", db);
+ redis_submit(node, "records", db_id, val);
+ }
+ return 0;
+
+} /* }}} int redis_db_stats */
+
+static void redis_cpu_usage(const char *node, char const *info_line) {
+ while (42) {
+ value_t rusage_user;
+ value_t rusage_syst;
+
+ if (redis_get_info_value(info_line, "used_cpu_user", DS_TYPE_GAUGE,
+ &rusage_user) != 0)
+ break;
+
+ if (redis_get_info_value(info_line, "used_cpu_sys", DS_TYPE_GAUGE,
+ &rusage_syst) != 0)
+ break;
+
+ redis_submit2(node, "ps_cputime", "daemon",
+ (value_t){.derive = rusage_user.gauge * 1000000},
+ (value_t){.derive = rusage_syst.gauge * 1000000});
+ break;
+ }
+
+ while (42) {
+ value_t rusage_user;
+ value_t rusage_syst;
+
+ if (redis_get_info_value(info_line, "used_cpu_user_children", DS_TYPE_GAUGE,
+ &rusage_user) != 0)
+ break;
+
+ if (redis_get_info_value(info_line, "used_cpu_sys_children", DS_TYPE_GAUGE,
+ &rusage_syst) != 0)
+ break;
+
+ redis_submit2(node, "ps_cputime", "children",
+ (value_t){.derive = rusage_user.gauge * 1000000},
+ (value_t){.derive = rusage_syst.gauge * 1000000});
+ break;
+ }
+} /* void redis_cpu_usage */
+
+static gauge_t calculate_ratio_percent(derive_t part1, derive_t part2,
+ derive_t *prev1, derive_t *prev2) {
+ if ((*prev1 == 0) || (*prev2 == 0) || (part1 < *prev1) || (part2 < *prev2)) {
+ *prev1 = part1;
+ *prev2 = part2;
+ return NAN;
+ }
+
+ derive_t num = part1 - *prev1;
+ derive_t denom = part2 - *prev2 + num;
+
+ *prev1 = part1;
+ *prev2 = part2;
+
+ if (denom == 0)
+ return NAN;
+
+ if (num == 0)
+ return 0;
+
+ return 100.0 * (gauge_t)num / (gauge_t)denom;
+} /* gauge_t calculate_ratio_percent */
+
+static void redis_keyspace_usage(redis_node_t *rn, char const *info_line) {
+ value_t hits, misses;
+
+ if (redis_get_info_value(info_line, "keyspace_hits", DS_TYPE_DERIVE, &hits) !=
+ 0)
+ return;
+
+ if (redis_get_info_value(info_line, "keyspace_misses", DS_TYPE_DERIVE,
+ &misses) != 0)
+ return;
+
+ redis_submit(rn->name, "cache_result", "hits", hits);
+ redis_submit(rn->name, "cache_result", "misses", misses);
+
+ prev_t *prev = &rn->prev;
+ gauge_t ratio = calculate_ratio_percent(
+ hits.derive, misses.derive, &prev->keyspace_hits, &prev->keyspace_misses);
+ redis_submit(rn->name, "percent", "hitratio", (value_t){.gauge = ratio});
+
+} /* void redis_keyspace_usage */
+
+static void redis_check_connection(redis_node_t *rn) {
+ if (rn->redisContext)
+ return;
+
+ redisContext *rh = redisConnectWithTimeout(rn->host, rn->port, rn->timeout);
+
+ if (rh == NULL) {
+ ERROR("redis plugin: can't allocate redis context");
+ return;
+ }
+ if (rh->err) {
+ ERROR("redis plugin: unable to connect to node `%s' (%s:%d): %s.", rn->name,
+ rn->host, rn->port, rh->errstr);
+ redisFree(rh);
+ return;
+ }
+
+ rn->redisContext = rh;
+
+ if (rn->passwd) {
+ redisReply *rr;
+
+ DEBUG("redis plugin: authenticating node `%s' passwd(%s).", rn->name,
+ rn->passwd);
+
+ if ((rr = c_redisCommand(rn, "AUTH %s", rn->passwd)) == NULL) {
+ WARNING("redis plugin: unable to authenticate on node `%s'.", rn->name);
+ return;
}
- memset (&info, 0, sizeof (info));
- status = credis_info (rh, &info);
- if (status != 0)
- {
- WARNING ("redis plugin: unable to get info from node `%s'.", rn->name);
- credis_close (rh);
+ if (rr->type != REDIS_REPLY_STATUS) {
+ WARNING("redis plugin: invalid authentication on node `%s'.", rn->name);
+ freeReplyObject(rr);
+ redisFree(rn->redisContext);
+ rn->redisContext = NULL;
+ return;
+ }
+
+ freeReplyObject(rr);
+ }
+ return;
+} /* void redis_check_connection */
+
+static void redis_read_server_info(redis_node_t *rn) {
+ redisReply *rr;
+
+ if ((rr = c_redisCommand(rn, "INFO")) == NULL) {
+ WARNING("redis plugin: unable to get INFO from node `%s'.", rn->name);
+ return;
+ }
+
+ redis_handle_info(rn->name, rr->str, "uptime", NULL, "uptime_in_seconds",
+ DS_TYPE_GAUGE);
+ redis_handle_info(rn->name, rr->str, "current_connections", "clients",
+ "connected_clients", DS_TYPE_GAUGE);
+ redis_handle_info(rn->name, rr->str, "blocked_clients", NULL,
+ "blocked_clients", DS_TYPE_GAUGE);
+ redis_handle_info(rn->name, rr->str, "memory", NULL, "used_memory",
+ DS_TYPE_GAUGE);
+ redis_handle_info(rn->name, rr->str, "memory_lua", NULL, "used_memory_lua",
+ DS_TYPE_GAUGE);
+ /* changes_since_last_save: Deprecated in redis version 2.6 and above */
+ redis_handle_info(rn->name, rr->str, "volatile_changes", NULL,
+ "changes_since_last_save", DS_TYPE_GAUGE);
+ redis_handle_info(rn->name, rr->str, "total_connections", NULL,
+ "total_connections_received", DS_TYPE_DERIVE);
+ redis_handle_info(rn->name, rr->str, "total_operations", NULL,
+ "total_commands_processed", DS_TYPE_DERIVE);
+ redis_handle_info(rn->name, rr->str, "expired_keys", NULL, "expired_keys",
+ DS_TYPE_DERIVE);
+ redis_handle_info(rn->name, rr->str, "evicted_keys", NULL, "evicted_keys",
+ DS_TYPE_DERIVE);
+ redis_handle_info(rn->name, rr->str, "pubsub", "channels", "pubsub_channels",
+ DS_TYPE_GAUGE);
+ redis_handle_info(rn->name, rr->str, "pubsub", "patterns", "pubsub_patterns",
+ DS_TYPE_GAUGE);
+ redis_handle_info(rn->name, rr->str, "current_connections", "slaves",
+ "connected_slaves", DS_TYPE_GAUGE);
+ redis_handle_info(rn->name, rr->str, "total_bytes", "input",
+ "total_net_input_bytes", DS_TYPE_DERIVE);
+ redis_handle_info(rn->name, rr->str, "total_bytes", "output",
+ "total_net_output_bytes", DS_TYPE_DERIVE);
+
+ redis_keyspace_usage(rn, rr->str);
+
+ redis_db_stats(rn->name, rr->str);
+
+ if (rn->report_cpu_usage)
+ redis_cpu_usage(rn->name, rr->str);
+
+ freeReplyObject(rr);
+} /* void redis_read_server_info */
+
+static void redis_read_command_stats(redis_node_t *rn) {
+ redisReply *rr;
+
+ if ((rr = c_redisCommand(rn, "INFO commandstats")) == NULL) {
+ WARNING("redis plugin: node `%s': unable to get `INFO commandstats'.",
+ rn->name);
+ return;
+ }
+
+ if (rr->type != REDIS_REPLY_STRING) {
+ WARNING("redis plugin: node `%s' `INFO commandstats' returned unsupported "
+ "redis type %i.",
+ rn->name, rr->type);
+ freeReplyObject(rr);
+ return;
+ }
+
+ char *command;
+ char *line;
+ char *ptr = rr->str;
+ char *saveptr = NULL;
+ while ((line = strtok_r(ptr, "\n\r", &saveptr)) != NULL) {
+ ptr = NULL;
+
+ if (line[0] == '#')
+ continue;
+
+ /* command name */
+ if (strstr(line, "cmdstat_") != line) {
+ ERROR("redis plugin: not found 'cmdstat_' prefix in line '%s'", line);
continue;
}
- /* typedef struct _cr_info {
- * char redis_version[CREDIS_VERSION_STRING_SIZE];
- * int bgsave_in_progress;
- * int connected_clients;
- * int connected_slaves;
- * unsigned int used_memory;
- * long long changes_since_last_save;
- * int last_save_time;
- * long long total_connections_received;
- * long long total_commands_processed;
- * int uptime_in_seconds;
- * int uptime_in_days;
- * int role;
- * } REDIS_INFO; */
-
- DEBUG ("redis plugin: received info from node `%s': connected_clients = %d; "
- "connected_slaves = %d; used_memory = %lu; changes_since_last_save = %lld; "
- "bgsave_in_progress = %d; total_connections_received = %lld; "
- "total_commands_processed = %lld; uptime_in_seconds = %ld", rn->name,
- info.connected_clients, info.connected_slaves, info.used_memory,
- info.changes_since_last_save, info.bgsave_in_progress,
- info.total_connections_received, info.total_commands_processed,
- info.uptime_in_seconds);
-
- redis_submit_g (rn->name, "current_connections", "clients", info.connected_clients);
- redis_submit_g (rn->name, "current_connections", "slaves", info.connected_slaves);
- redis_submit_g (rn->name, "memory", "used", info.used_memory);
- redis_submit_g (rn->name, "volatile_changes", NULL, info.changes_since_last_save);
- redis_submit_d (rn->name, "total_connections", NULL, info.total_connections_received);
- redis_submit_d (rn->name, "total_operations", NULL, info.total_commands_processed);
-
- credis_close (rh);
+ char *values = strstr(line, ":");
+ if (values == NULL) {
+ ERROR("redis plugin: not found ':' separator in line '%s'", line);
+ continue;
+ }
+
+ /* Null-terminate command token */
+ values[0] = '\0';
+ command = line + strlen("cmdstat_");
+ values++;
+
+ /* parse values */
+ /* cmdstat_publish:calls=20795774,usec=111039258,usec_per_call=5.34 */
+ char *field;
+ char *saveptr_field = NULL;
+ while ((field = strtok_r(values, "=", &saveptr_field)) != NULL) {
+ values = NULL;
+
+ const char *type;
+ /* only these are supported */
+ if (strcmp(field, "calls") == 0)
+ type = "commands";
+ else if (strcmp(field, "usec") == 0)
+ type = "redis_command_cputime";
+ else
+ continue;
+
+ if ((field = strtok_r(NULL, ",", &saveptr_field)) == NULL)
+ continue;
+
+ char *endptr = NULL;
+ errno = 0;
+ derive_t value = strtoll(field, &endptr, 0);
+
+ if ((endptr == field) || (errno != 0))
+ continue;
+
+ redis_submit(rn->name, type, command, (value_t){.derive = value});
+ }
+ }
+ freeReplyObject(rr);
+} /* void redis_read_command_stats */
+
+static int redis_read(user_data_t *user_data) /* {{{ */
+{
+ redis_node_t *rn = user_data->data;
+
+ DEBUG("redis plugin: querying info from node `%s' (%s:%d).", rn->name,
+ rn->host, rn->port);
+
+ redis_check_connection(rn);
+
+ if (!rn->redisContext) /* no connection */
+ return -1;
+
+ redis_read_server_info(rn);
+
+ if (!rn->redisContext) /* connection lost */
+ return -1;
+
+ if (rn->report_command_stats) {
+ redis_read_command_stats(rn);
+
+ if (!rn->redisContext) /* connection lost */
+ return -1;
+ }
+
+ for (redis_query_t *rq = rn->queries; rq != NULL; rq = rq->next) {
+ redis_handle_query(rn, rq);
+ if (!rn->redisContext) /* connection lost */
+ return -1;
}
return 0;
}
/* }}} */
-void module_register (void) /* {{{ */
+void module_register(void) /* {{{ */
{
- plugin_register_complex_config ("redis", redis_config);
- plugin_register_init ("redis", redis_init);
- plugin_register_read ("redis", redis_read);
- /* TODO: plugin_register_write: one redis list per value id with
- * X elements */
+ plugin_register_complex_config("redis", redis_config);
+ plugin_register_init("redis", redis_init);
}
/* }}} */
-
-/* vim: set sw=2 sts=2 et fdm=marker : */