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45 lines
2.6 KiB
Go
45 lines
2.6 KiB
Go
package datasource
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import (
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"flag"
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"fmt"
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"net/http"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/utils"
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)
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var (
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addr = flag.String("datasource.url", "", "Victoria Metrics or VMSelect url. Required parameter."+
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" E.g. http://127.0.0.1:8428")
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basicAuthUsername = flag.String("datasource.basicAuth.username", "", "Optional basic auth username for -datasource.url")
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basicAuthPassword = flag.String("datasource.basicAuth.password", "", "Optional basic auth password for -datasource.url")
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tlsInsecureSkipVerify = flag.Bool("datasource.tlsInsecureSkipVerify", false, "Whether to skip tls verification when connecting to -datasource.url")
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tlsCertFile = flag.String("datasource.tlsCertFile", "", "Optional path to client-side TLS certificate file to use when connecting to -datasource.url")
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tlsKeyFile = flag.String("datasource.tlsKeyFile", "", "Optional path to client-side TLS certificate key to use when connecting to -datasource.url")
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tlsCAFile = flag.String("datasource.tlsCAFile", "", "Optional path to TLS CA file to use for verifying connections to -datasource.url. "+
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"By default system CA is used")
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tlsServerName = flag.String("datasource.tlsServerName", "", "Optional TLS server name to use for connections to -datasource.url. "+
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"By default the server name from -datasource.url is used")
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lookBack = flag.Duration("datasource.lookback", 0, "Lookback defines how far to look into past when evaluating queries. "+
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"For example, if datasource.lookback=5m then param \"time\" with value now()-5m will be added to every query.")
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queryStep = flag.Duration("datasource.queryStep", 0, "queryStep defines how far a value can fallback to when evaluating queries. "+
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"For example, if datasource.queryStep=15s then param \"step\" with value \"15s\" will be added to every query.")
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maxIdleConnections = flag.Int("datasource.maxIdleConnections", 100, "Defines the number of idle (keep-alive connections) to configured datasource."+
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"Consider to set this value equal to the value: groups_total * group.concurrency. Too low value may result into high number of sockets in TIME_WAIT state.")
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)
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// Init creates a Querier from provided flag values.
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func Init() (Querier, error) {
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if *addr == "" {
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return nil, fmt.Errorf("datasource.url is empty")
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}
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tr, err := utils.Transport(*addr, *tlsCertFile, *tlsKeyFile, *tlsCAFile, *tlsServerName, *tlsInsecureSkipVerify)
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if err != nil {
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return nil, fmt.Errorf("failed to create transport: %w", err)
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}
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tr.MaxIdleConns = *maxIdleConnections
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c := &http.Client{Transport: tr}
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return NewVMStorage(*addr, *basicAuthUsername, *basicAuthPassword, *lookBack, *queryStep, c), nil
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}
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