Update prometheus-mysqld-exporter.conf
Version 0.15.0 removed support for the monolithic DATA_SOURCE_NAME environment variable and added the MYSQLD_EXPORTER_PASSWORD variable:
https://github.com/prometheus/mysqld_exporter/releases/tag/v0.15.0
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Version 0.15.0 removed support for the monolithic DATA_SOURCE_NAME environment variable and added the MYSQLD_EXPORTER_PASSWORD variable:
https://github.com/prometheus/mysqld_exporter/releases/tag/v0.15.0