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https://github.com/VictoriaMetrics/VictoriaMetrics.git
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cfb6436be5
* vmalert: allow extra GET params in datasource package ExtraParams will be added as GET params to every HTTP request made by datasource. The `roundDigits` param, for example, was substituted by corresponding extra param. * vmalert: add nocache=1 param for replay process The `nocache=1` param is VictoriaMetrics specific parameter which prevents it from caching and boundaries aligning for queries. We set it to avoid cache pollution in `replay` mode and also to avoid unnecessary time range boundaries alignment. * vmalert: mention nocache=1 in replay description * vmalert: fix bug with unused param
71 lines
3.7 KiB
Go
71 lines
3.7 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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"strings"
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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", "", "VictoriaMetrics or vmselect url. Required parameter. "+
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"E.g. http://127.0.0.1:8428")
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appendTypePrefix = flag.Bool("datasource.appendTypePrefix", false, "Whether to add type prefix to -datasource.url based on the query type. Set to true if sending different query types to the vmselect URL.")
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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. 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. By default, the server name from -datasource.url is used`)
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lookBack = flag.Duration("datasource.lookback", 0, `Lookback defines how far into the past to look when evaluating queries. For example, if the 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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"If queryStep isn't specified, rule's evaluationInterval will be used instead.")
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maxIdleConnections = flag.Int("datasource.maxIdleConnections", 100, `Defines the number of idle (keep-alive connections) to each configured datasource. Consider setting this value equal to the value: groups_total * group.concurrency. Too low a value may result in a high number of sockets in TIME_WAIT state.`)
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roundDigits = flag.Int("datasource.roundDigits", 0, `Adds "round_digits" GET param to datasource requests. `+
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`In VM "round_digits" limits the number of digits after the decimal point in response values.`)
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)
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// Param represents an HTTP GET param
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type Param struct {
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Key, Value string
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}
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// Init creates a Querier from provided flag values.
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// Provided extraParams will be added as GET params to
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// each request.
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func Init(extraParams []Param) (QuerierBuilder, 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.MaxIdleConnsPerHost = *maxIdleConnections
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if *roundDigits > 0 {
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extraParams = append(extraParams, Param{
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Key: "round_digits",
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Value: fmt.Sprintf("%d", *roundDigits),
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})
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}
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return &VMStorage{
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c: &http.Client{Transport: tr},
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basicAuthUser: *basicAuthUsername,
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basicAuthPass: *basicAuthPassword,
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datasourceURL: strings.TrimSuffix(*addr, "/"),
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appendTypePrefix: *appendTypePrefix,
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lookBack: *lookBack,
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queryStep: *queryStep,
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dataSourceType: NewPrometheusType(),
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extraParams: extraParams,
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}, nil
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}
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