mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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115 lines
6.8 KiB
Go
115 lines
6.8 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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"net/url"
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"strings"
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"time"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/utils"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
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)
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var (
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addr = flag.String("datasource.url", "", "Datasource compatible with Prometheus HTTP API. It can be single node VictoriaMetrics or vmselect URL. Required parameter. "+
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"E.g. http://127.0.0.1:8428 . See also -remoteRead.disablePathAppend and -datasource.showURL")
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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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showDatasourceURL = flag.Bool("datasource.showURL", false, "Whether to show -datasource.url in the exported metrics. "+
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"It is hidden by default, since it can contain sensitive info such as auth key")
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headers = flag.String("datasource.headers", "", "Optional HTTP extraHeaders to send with each request to the corresponding -datasource.url. "+
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"For example, -datasource.headers='My-Auth:foobar' would send 'My-Auth: foobar' HTTP header with every request to the corresponding -datasource.url. "+
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"Multiple headers must be delimited by '^^': -datasource.headers='header1:value1^^header2:value2'")
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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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basicAuthPasswordFile = flag.String("datasource.basicAuth.passwordFile", "", "Optional path to basic auth password to use for -datasource.url")
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bearerToken = flag.String("datasource.bearerToken", "", "Optional bearer auth token to use for -datasource.url.")
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bearerTokenFile = flag.String("datasource.bearerTokenFile", "", "Optional path to bearer token file to use 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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oauth2ClientID = flag.String("datasource.oauth2.clientID", "", "Optional OAuth2 clientID to use for -datasource.url. ")
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oauth2ClientSecret = flag.String("datasource.oauth2.clientSecret", "", "Optional OAuth2 clientSecret to use for -datasource.url.")
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oauth2ClientSecretFile = flag.String("datasource.oauth2.clientSecretFile", "", "Optional OAuth2 clientSecretFile to use for -datasource.url. ")
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oauth2TokenURL = flag.String("datasource.oauth2.tokenUrl", "", "Optional OAuth2 tokenURL to use for -datasource.url.")
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oauth2Scopes = flag.String("datasource.oauth2.scopes", "", "Optional OAuth2 scopes to use for -datasource.url. Scopes must be delimited by ';'")
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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", 5*time.Minute, "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 set to 0, rule's evaluation interval will be used instead.")
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queryTimeAlignment = flag.Bool("datasource.queryTimeAlignment", true, `Whether to align "time" parameter with evaluation interval.`+
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"Alignment supposed to produce deterministic results despite of number of vmalert replicas or time they were started. See more details here https://github.com/VictoriaMetrics/VictoriaMetrics/pull/1257")
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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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disableKeepAlive = flag.Bool("datasource.disableKeepAlive", false, `Whether to disable long-lived connections to the datasource. `+
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`If true, disables HTTP keep-alives and will only use the connection to the server for a single HTTP request.`)
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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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// InitSecretFlags must be called after flag.Parse and before any logging
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func InitSecretFlags() {
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if !*showDatasourceURL {
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flagutil.RegisterSecretFlag("datasource.url")
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}
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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 for
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// each request.
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func Init(extraParams url.Values) (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.DisableKeepAlives = *disableKeepAlive
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tr.MaxIdleConnsPerHost = *maxIdleConnections
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if tr.MaxIdleConns != 0 && tr.MaxIdleConns < tr.MaxIdleConnsPerHost {
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tr.MaxIdleConns = tr.MaxIdleConnsPerHost
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}
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if extraParams == nil {
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extraParams = url.Values{}
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}
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if *roundDigits > 0 {
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extraParams.Set("round_digits", fmt.Sprintf("%d", *roundDigits))
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}
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authCfg, err := utils.AuthConfig(
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utils.WithBasicAuth(*basicAuthUsername, *basicAuthPassword, *basicAuthPasswordFile),
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utils.WithBearer(*bearerToken, *bearerTokenFile),
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utils.WithOAuth(*oauth2ClientID, *oauth2ClientSecret, *oauth2ClientSecretFile, *oauth2TokenURL, *oauth2Scopes),
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utils.WithHeaders(*headers))
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if err != nil {
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return nil, fmt.Errorf("failed to configure auth: %w", err)
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}
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return &VMStorage{
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c: &http.Client{Transport: tr},
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authCfg: authCfg,
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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: datasourcePrometheus,
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extraParams: extraParams,
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}, nil
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}
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