通過grafana查看zabbix的數據發現數據為空
重啟zabbix-server以及在zabbix-server上獲取agent的key都是正常的。
通過zabbix-server的日志發現
1006183:20201027:000001.680 [Z3005] query failed: [1526] Table has no partition for value 1603724401 [insert into history (itemid,clock,ns,value) values (581161,1603724401,679475011,0.003825);
有大量的此類報錯，將此類sql 在mysql中執行報錯，報錯大概是說沒有找到分區
mysql報錯為
Aborted connection 24 to db: 'zabbix' user: 'zabbix' host: '127.0.0.1' (Got an error reading communication packets)
通過上訴報錯基本可以確認導致報錯的原因是zabbix-server插入mysql數據 找不表的對應分區
最初搭建zabbix的時候，擔心單表過大，所有對歷史表做了分區的操作，后因為壓力原因將zabbix進行了遷移，遷移前將數據清空了，由此懷疑之前清空數據的時候把之前的表的分區也清空了，導致現在查詢 插入都報錯。
解決方案：
先關閉zabbix-server
1、查看關於歷史（history）表的建表語句；當時對所有的歷史表進行了分區，因此需要查詢每個表
SHOW CREATE TABLE 分過區的表名；
例：
>use zabbix;
>SHOW CREATE TABLE history;
| history_bak | CREATE TABLE `history_bak` (
`itemid` bigint(20) unsigned NOT NULL,
`clock` int(11) NOT NULL DEFAULT '0',
`value` double(16,4) NOT NULL DEFAULT '0.0000',
`ns` int(11) NOT NULL DEFAULT '0',
KEY `history_1` (`itemid`,`clock`),
KEY `clock` (`clock`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin
/*!50100 PARTITION BY RANGE (`clock`)
(PARTITION p202009150000 VALUES LESS THAN (1600182000) ENGINE = InnoDB,
PARTITION p202009160000 VALUES LESS THAN (1600268400) ENGINE = InnoDB,
PARTITION p202009170000 VALUES LESS THAN (1600354800) ENGINE = InnoDB,
PARTITION p202009180000 VALUES LESS THAN (1600441200) ENGINE = InnoDB,
PARTITION p202009190000 VALUES LESS THAN (1600527600) ENGINE = InnoDB,
PARTITION p202009200000 VALUES LESS THAN (1600614000) ENGINE = InnoDB,
PARTITION p202009210000 VALUES LESS THAN (1600700400) ENGINE = InnoDB,
PARTITION p202009220000 VALUES LESS THAN (1600786800) ENGINE = InnoDB,
PARTITION p202009230000 VALUES LESS THAN (1600873200) ENGINE = InnoDB,
PARTITION p202009240000 VALUES LESS THAN (1600959600) ENGINE = InnoDB,
PARTITION p202009250000 VALUES LESS THAN (1601046000) ENGINE = InnoDB,
PARTITION p202009260000 VALUES LESS THAN (1601132400) ENGINE = InnoDB,
PARTITION p202009270000 VALUES LESS THAN (1601218800) ENGINE = InnoDB,
PARTITION p202009280000 VALUES LESS THAN (1601305200) ENGINE = InnoDB,
PARTITION p202009290000 VALUES LESS THAN (1601391600) ENGINE = InnoDB,
PARTITION p202009300000 VALUES LESS THAN (1601478000) ENGINE = InnoDB,
PARTITION p202010010000 VALUES LESS THAN (1601564400) ENGINE = InnoDB,
PARTITION p202010020000 VALUES LESS THAN (1601650800) ENGINE = InnoDB,
PARTITION p202010030000 VALUES LESS THAN (1601737200) ENGINE = InnoDB,
PARTITION p202010040000 VALUES LESS THAN (1601823600) ENGINE = InnoDB,
PARTITION p202010050000 VALUES LESS THAN (1601910000) ENGINE = InnoDB,
PARTITION p202010060000 VALUES LESS THAN (1601996400) ENGINE = InnoDB,
PARTITION p202010070000 VALUES LESS THAN (1602082800) ENGINE = InnoDB,
PARTITION p202010080000 VALUES LESS THAN (1602169200) ENGINE = InnoDB,
PARTITION p202010090000 VALUES LESS THAN (1602255600) ENGINE = InnoDB,
PARTITION p202010100000 VALUES LESS THAN (1602342000) ENGINE = InnoDB,
PARTITION p202010110000 VALUES LESS THAN (1602428400) ENGINE = InnoDB,
PARTITION p202010120000 VALUES LESS THAN (1602514800) ENGINE = InnoDB,
PARTITION p202010130000 VALUES LESS THAN (1602601200) ENGINE = InnoDB,
PARTITION p202010140000 VALUES LESS THAN (1602687600) ENGINE = InnoDB,
PARTITION p202010150000 VALUES LESS THAN (1602774000) ENGINE = InnoDB,
PARTITION p202010160000 VALUES LESS THAN (1602860400) ENGINE = InnoDB,
PARTITION p202010170000 VALUES LESS THAN (1602946800) ENGINE = InnoDB,
PARTITION p202010180000 VALUES LESS THAN (1603033200) ENGINE = InnoDB,
PARTITION p202010190000 VALUES LESS THAN (1603119600) ENGINE = InnoDB,
PARTITION p202010200000 VALUES LESS THAN (1603206000) ENGINE = InnoDB,
PARTITION p202010210000 VALUES LESS THAN (1603292400) ENGINE = InnoDB,
PARTITION p202010220000 VALUES LESS THAN (1603378800) ENGINE = InnoDB,
PARTITION p202010230000 VALUES LESS THAN (1603465200) ENGINE = InnoDB,
PARTITION p202010240000 VALUES LESS THAN (1603551600) ENGINE = InnoDB,
PARTITION p202010250000 VALUES LESS THAN (1603638000) ENGINE = InnoDB,
PARTITION p202010260000 VALUES LESS THAN (1603724400) ENGINE = InnoDB) */ |
+-------------+---------------------------------------------------------------
其中建表語句為
CREATE TABLE `history_bak` (
`itemid` bigint(20) unsigned NOT NULL,
`clock` int(11) NOT NULL DEFAULT '0',
`value` double(16,4) NOT NULL DEFAULT '0.0000',
`ns` int(11) NOT NULL DEFAULT '0',
KEY `history_1` (`itemid`,`clock`),
KEY `clock` (`clock`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin；
2、將原表重命令，已備創建表失敗及時查看使用（每個history表都要執行）
alter table 表名 rename to 修改后的表名;
例：alter table history rename to history_bak;
3、執行創表語句（每個history表都要執行）
執行1、獲取的sql語句
例：
CREATE TABLE `history` (
`itemid` bigint(20) unsigned NOT NULL,
`clock` int(11) NOT NULL DEFAULT '0',
`value` double(16,4) NOT NULL DEFAULT '0.0000',
`ns` int(11) NOT NULL DEFAULT '0',
KEY `history_1` (`itemid`,`clock`),
KEY `clock` (`clock`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
4、打開zabbix-server 檢查數據可以正常讀取
以上步驟只是可以暫時讓zabbix可用，但一段時候后同樣的現象還是會出現
徹底解決
1、重新創建四個存儲過程
DELIMITER $$
CREATE PROCEDURE `partition_create`(SCHEMANAME varchar(64), TABLENAME varchar(64), PARTITIONNAME varchar(64), CLOCK int)
BEGIN
/*
SCHEMANAME = The DB schema in which to make changes
TABLENAME = The table with partitions to potentially delete
PARTITIONNAME = The name of the partition to create
*/
/*
Verify that the partition does not already exist
*/
DECLARE RETROWS INT;
SELECT COUNT(1) INTO RETROWS
FROM information_schema.partitions
WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_description >= CLOCK;
IF RETROWS = 0 THEN
/*
1. Print a message indicating that a partition was created.
2. Create the SQL to create the partition.
3. Execute the SQL from #2.
*/
SELECT CONCAT( "partition_create(", SCHEMANAME, ",", TABLENAME, ",", PARTITIONNAME, ",", CLOCK, ")" ) AS msg;
SET @sql = CONCAT( 'ALTER TABLE ', SCHEMANAME, '.', TABLENAME, ' ADD PARTITION (PARTITION ', PARTITIONNAME, ' VALUES LESS THAN (', CLOCK, '));' );
PREPARE STMT FROM @sql;
EXECUTE STMT;
DEALLOCATE PREPARE STMT;
END IF;
END$$
DELIMITER ;
DELIMITER $$
CREATE PROCEDURE `partition_drop`(SCHEMANAME VARCHAR(64), TABLENAME VARCHAR(64), DELETE_BELOW_PARTITION_DATE BIGINT)
BEGIN
/*
SCHEMANAME = The DB schema in which to make changes
TABLENAME = The table with partitions to potentially delete
DELETE_BELOW_PARTITION_DATE = Delete any partitions with names that are dates older than this one (yyyy-mm-dd)
*/
DECLARE done INT DEFAULT FALSE;
DECLARE drop_part_name VARCHAR(16);
/*
Get a list of all the partitions that are older than the date
in DELETE_BELOW_PARTITION_DATE. All partitions are prefixed with
a "p", so use SUBSTRING TO get rid of that character.
*/
DECLARE myCursor CURSOR FOR
SELECT partition_name
FROM information_schema.partitions
WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND CAST(SUBSTRING(partition_name FROM 2) AS UNSIGNED) < DELETE_BELOW_PARTITION_DATE;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
/*
Create the basics for when we need to drop the partition. Also, create
@drop_partitions to hold a comma-delimited list of all partitions that
should be deleted.
*/
SET @alter_header = CONCAT("ALTER TABLE ", SCHEMANAME, ".", TABLENAME, " DROP PARTITION ");
SET @drop_partitions = "";
/*
Start looping through all the partitions that are too old.
*/
OPEN myCursor;
read_loop: LOOP
FETCH myCursor INTO drop_part_name;
IF done THEN
LEAVE read_loop;
END IF;
SET @drop_partitions = IF(@drop_partitions = "", drop_part_name, CONCAT(@drop_partitions, ",", drop_part_name));
END LOOP;
IF @drop_partitions != "" THEN
/*
1. Build the SQL to drop all the necessary partitions.
2. Run the SQL to drop the partitions.
3. Print out the table partitions that were deleted.
*/
SET @full_sql = CONCAT(@alter_header, @drop_partitions, ";");
PREPARE STMT FROM @full_sql;
EXECUTE STMT;
DEALLOCATE PREPARE STMT;
SELECT CONCAT(SCHEMANAME, ".", TABLENAME) AS `table`, @drop_partitions AS `partitions_deleted`;
ELSE
/*
No partitions are being deleted, so print out "N/A" (Not applicable) to indicate
that no changes were made.
*/
SELECT CONCAT(SCHEMANAME, ".", TABLENAME) AS `table`, "N/A" AS `partitions_deleted`;
END IF;
END$$
DELIMITER ;
DELIMITER $$
CREATE PROCEDURE `partition_maintenance`(SCHEMA_NAME VARCHAR(32), TABLE_NAME VARCHAR(32), KEEP_DATA_DAYS INT, HOURLY_INTERVAL INT, CREATE_NEXT_INTERVALS INT)
BEGIN
DECLARE OLDER_THAN_PARTITION_DATE VARCHAR(16);
DECLARE PARTITION_NAME VARCHAR(16);
DECLARE OLD_PARTITION_NAME VARCHAR(16);
DECLARE LESS_THAN_TIMESTAMP INT;
DECLARE CUR_TIME INT;
CALL partition_verify(SCHEMA_NAME, TABLE_NAME, HOURLY_INTERVAL);
SET CUR_TIME = UNIX_TIMESTAMP(DATE_FORMAT(NOW(), '%Y-%m-%d 00:00:00'));
SET @__interval = 1;
create_loop: LOOP
IF @__interval > CREATE_NEXT_INTERVALS THEN
LEAVE create_loop;
END IF;
SET LESS_THAN_TIMESTAMP = CUR_TIME + (HOURLY_INTERVAL * @__interval * 3600);
SET PARTITION_NAME = FROM_UNIXTIME(CUR_TIME + HOURLY_INTERVAL * (@__interval - 1) * 3600, 'p%Y%m%d%H00');
IF(PARTITION_NAME != OLD_PARTITION_NAME) THEN
CALL partition_create(SCHEMA_NAME, TABLE_NAME, PARTITION_NAME, LESS_THAN_TIMESTAMP);
END IF;
SET @__interval=@__interval+1;
SET OLD_PARTITION_NAME = PARTITION_NAME;
END LOOP;
SET OLDER_THAN_PARTITION_DATE=DATE_FORMAT(DATE_SUB(NOW(), INTERVAL KEEP_DATA_DAYS DAY), '%Y%m%d0000');
CALL partition_drop(SCHEMA_NAME, TABLE_NAME, OLDER_THAN_PARTITION_DATE);
END$$
DELIMITER ;
DELIMITER $$
CREATE PROCEDURE `partition_verify`(SCHEMANAME VARCHAR(64), TABLENAME VARCHAR(64), HOURLYINTERVAL INT(11))
BEGIN
DECLARE PARTITION_NAME VARCHAR(16);
DECLARE RETROWS INT(11);
DECLARE FUTURE_TIMESTAMP TIMESTAMP;
/*
* Check if any partitions exist for the given SCHEMANAME.TABLENAME.
*/
SELECT COUNT(1) INTO RETROWS
FROM information_schema.partitions
WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_name IS NULL;
/*
* If partitions do not exist, go ahead and partition the table
*/
IF RETROWS = 1 THEN
/*
* Take the current date at 00:00:00 and add HOURLYINTERVAL to it. This is the timestamp below which we will store values.
* We begin partitioning based on the beginning of a day. This is because we don't want to generate a random partition
* that won't necessarily fall in line with the desired partition naming (ie: if the hour interval is 24 hours, we could
* end up creating a partition now named "p201403270600" when all other partitions will be like "p201403280000").
*/
SET FUTURE_TIMESTAMP = TIMESTAMPADD(HOUR, HOURLYINTERVAL, CONCAT(CURDATE(), " ", '00:00:00'));
SET PARTITION_NAME = DATE_FORMAT(CURDATE(), 'p%Y%m%d%H00');
-- Create the partitioning query
SET @__PARTITION_SQL = CONCAT("ALTER TABLE ", SCHEMANAME, ".", TABLENAME, " PARTITION BY RANGE(`clock`)");
SET @__PARTITION_SQL = CONCAT(@__PARTITION_SQL, "(PARTITION ", PARTITION_NAME, " VALUES LESS THAN (", UNIX_TIMESTAMP(FUTURE_TIMESTAMP), "));");
-- Run the partitioning query
PREPARE STMT FROM @__PARTITION_SQL;
EXECUTE STMT;
DEALLOCATE PREPARE STMT;
END IF;
END$$
DELIMITER ;
2、重新執行表分區命令
做成一個統一的表
DELIMITER $$
CREATE PROCEDURE `partition_maintenance_all`(SCHEMA_NAME VARCHAR(32))
BEGIN
CALL partition_maintenance(SCHEMA_NAME, 'history', 28, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'history_log', 28, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'history_str', 28, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'history_text', 28, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'history_uint', 28, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'trends', 730, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'trends_uint', 730, 24, 14);
END$$
DELIMITER ;
mysql> CALL partition_maintenance_all('zabbix');
3、將表分區命令加入到crontab
crontab -l|tail -1
01 01 * * * /opt/software/mysql/bin/mysql -uzabbix -pzabbix zabbix -e "CALL partition_maintenance_all('zabbix');"
參考鏈接：
https://www.zabbix.org/wiki/Docs/howto/mysql_partition