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mirror of https://github.com/prometheus/mysqld_exporter.git synced 2025-07-30 06:43:05 +03:00

Introduce Scraper interface

Signed-off-by: Kamil Dziedzic <arvenil@klecza.pl>
This commit is contained in:
Kamil Dziedzic
2018-02-01 23:33:02 +01:00
parent f76ef420f1
commit f556a61867
47 changed files with 604 additions and 540 deletions

View File

@ -36,11 +36,16 @@ const (
`
)
// Tunable flags.
var (
tableSchemaDatabases = kingpin.Flag(
"collect.info_schema.tables.databases",
"The list of databases to collect table stats for, or '*' for all",
).Default("*").String()
)
// Metric descriptors.
var (
infoSchemaTablesVersionDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, informationSchema, "table_version"),
"The version number of the table's .frm file",
@ -59,7 +64,20 @@ var (
)
// ScrapeTableSchema collects from `information_schema.tables`.
func ScrapeTableSchema(db *sql.DB, ch chan<- prometheus.Metric) error {
type ScrapeTableSchema struct{}
// Name of the Scraper. Should be unique.
func (ScrapeTableSchema) Name() string {
return informationSchema + ".tables"
}
// Help describes the role of the Scraper.
func (ScrapeTableSchema) Help() string {
return "Collect metrics from information_schema.tables"
}
// Scrape collects data from database connection and sends it over channel as prometheus metric.
func (ScrapeTableSchema) Scrape(db *sql.DB, ch chan<- prometheus.Metric) error {
var dbList []string
if *tableSchemaDatabases == "*" {
dbListRows, err := db.Query(dbListQuery)