![]() ![]() ![]() Some of the common parameters that must be changed in the values file include: mysql.host: Defines the Mysql URL you want to monitor.Īdditional parameters can be changed based on individual needs – such as enabling and disabling collectors, parameters, etc. $ helm install prometheus-community/prometheus-mysql-exporter To deploy this Helm chart, users can either follow the steps in the above link or refer to the ones outlined below: $ helm repo add add prometheus-community The Helm chart used for deployment is from the Prometheus community, which can be found here. The MySQL exporter can be deployed in Kubernetes using the Helm chart. Some of the recommended MySQL alerts are: ➡ The metric “mysql_global_status_innodb_log_waits” indicates InnoDB log writes are stalling This metric provides insight into the number of times that the log buffer was too small and a wait was required for it to be flushed before continuing. ➡ The metric “mysql_global_status_innodb_buffer_pool_reads” shows the number of logical reads that InnoDB could not satisfy from the buffer pool and had to read directly from the disk Buffer pool metrics and other resource metrics are primarily useful for investigating performance issues. It uses an in-memory cache to optimize the disk read and write operations. MySQL InnoDB (default storage engine) uses an area of memory called the buffer pool to cache data for tables and indexes. ➡ The value provided will be the count of slow queries ➡ The metric key is “mysql_global_status_slow_query” The number of entries in this log can be consulted with the metric key below. Like many databases, MySQL keeps a log for these slow queries. Slow queries cause/indicate performance issues. ➡ The number should be calculated based on “mysql_global_variables_max_connections” which is the maximum number of connections configured ➡ The metric “ mysql_global_status_threads_connected” shows the total active connections on MySQL Therefore, it is important to monitor the number of connected clients. If all available connections are in use by other clients, the new clients trying to connect will encounter “ too many connections” errors when attempting to connect to the MySQL server. The permitted number of connections is controlled by the max_connections system variable. ➡ The value of the metric is a boolean – 1 or 0 which symbolizes if MySQL is up or down respectively (1 for yes, 0 for no) ➡ The key of the exporter metric is “mysql_up” This shows whether the last scrape of metrics from MySQL was able to connect to the server. The following ones are handpicked metrics for the MySQL exporter that will provide insights into MySQL. # prometheus.io/path: "/scrape/path" annotation. # prometheus.io/scrape: "true" annotation. # Example relabel to scrape only endpoints that have With this, Prometheus will automatically start scrapping the data from the services with the mentioned path. With this, a default scrap config can be added to the prometheus.yaml file and an annotation can be added to the exporter service. This method is applicable for Kubernetes deployment only ![]()
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