VictoriaMetrics/app/vmalert/remoteread/init.go
Aliaksandr Valialkin 476bf400ac
lib/{httputils,netutil}: move httputils.GetStatDialFunc to netutil.NewStatDialFunc
- Rename GetStatDialFunc to NewStatDialFunc, since it returns new function with every call
- NewStatDialFunc isn't related to http in any way, so it must be moved from lib/httputils to lib/netutil
- Simplify the implementation of NewStatDialFunc by removing sync.Map from there.
- Use netutil.NewStatDialFunc at app/vmauth and lib/promscrape/discoveryutils
- Use gauge instead of counter type for *_conns metric

This is a follow-up for d7b5062917
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/pull/6299
2024-07-15 23:05:46 +02:00

90 lines
5.5 KiB
Go

package remoteread
import (
"flag"
"fmt"
"net/http"
"time"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/datasource"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/utils"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/httputils"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/netutil"
)
var (
addr = flag.String("remoteRead.url", "", "Optional URL to datasource compatible with Prometheus HTTP API. It can be single node VictoriaMetrics or vmselect."+
"Remote read is used to restore alerts state."+
"This configuration makes sense only if `vmalert` was configured with `remoteWrite.url` before and has been successfully persisted its state. "+
"Supports address in the form of IP address with a port (e.g., 127.0.0.1:8428) or DNS SRV record. "+
"See also '-remoteRead.disablePathAppend', '-remoteRead.showURL'.")
showRemoteReadURL = flag.Bool("remoteRead.showURL", false, "Whether to show -remoteRead.url in the exported metrics. "+
"It is hidden by default, since it can contain sensitive info such as auth key")
headers = flag.String("remoteRead.headers", "", "Optional HTTP headers to send with each request to the corresponding -remoteRead.url. "+
"For example, -remoteRead.headers='My-Auth:foobar' would send 'My-Auth: foobar' HTTP header with every request to the corresponding -remoteRead.url. "+
"Multiple headers must be delimited by '^^': -remoteRead.headers='header1:value1^^header2:value2'")
basicAuthUsername = flag.String("remoteRead.basicAuth.username", "", "Optional basic auth username for -remoteRead.url")
basicAuthPassword = flag.String("remoteRead.basicAuth.password", "", "Optional basic auth password for -remoteRead.url")
basicAuthPasswordFile = flag.String("remoteRead.basicAuth.passwordFile", "", "Optional path to basic auth password to use for -remoteRead.url")
bearerToken = flag.String("remoteRead.bearerToken", "", "Optional bearer auth token to use for -remoteRead.url.")
bearerTokenFile = flag.String("remoteRead.bearerTokenFile", "", "Optional path to bearer token file to use for -remoteRead.url.")
idleConnectionTimeout = flag.Duration("remoteRead.idleConnTimeout", 50*time.Second, `Defines a duration for idle (keep-alive connections) to exist. Consider settings this value less to the value of "-http.idleConnTimeout". It must prevent possible "write: broken pipe" and "read: connection reset by peer" errors.`)
tlsInsecureSkipVerify = flag.Bool("remoteRead.tlsInsecureSkipVerify", false, "Whether to skip tls verification when connecting to -remoteRead.url")
tlsCertFile = flag.String("remoteRead.tlsCertFile", "", "Optional path to client-side TLS certificate file to use when connecting to -remoteRead.url")
tlsKeyFile = flag.String("remoteRead.tlsKeyFile", "", "Optional path to client-side TLS certificate key to use when connecting to -remoteRead.url")
tlsCAFile = flag.String("remoteRead.tlsCAFile", "", "Optional path to TLS CA file to use for verifying connections to -remoteRead.url. "+
"By default, system CA is used")
tlsServerName = flag.String("remoteRead.tlsServerName", "", "Optional TLS server name to use for connections to -remoteRead.url. "+
"By default, the server name from -remoteRead.url is used")
oauth2ClientID = flag.String("remoteRead.oauth2.clientID", "", "Optional OAuth2 clientID to use for -remoteRead.url.")
oauth2ClientSecret = flag.String("remoteRead.oauth2.clientSecret", "", "Optional OAuth2 clientSecret to use for -remoteRead.url.")
oauth2ClientSecretFile = flag.String("remoteRead.oauth2.clientSecretFile", "", "Optional OAuth2 clientSecretFile to use for -remoteRead.url.")
oauth2EndpointParams = flag.String("remoteRead.oauth2.endpointParams", "", "Optional OAuth2 endpoint parameters to use for -remoteRead.url . "+
`The endpoint parameters must be set in JSON format: {"param1":"value1",...,"paramN":"valueN"}`)
oauth2TokenURL = flag.String("remoteRead.oauth2.tokenUrl", "", "Optional OAuth2 tokenURL to use for -remoteRead.url. ")
oauth2Scopes = flag.String("remoteRead.oauth2.scopes", "", "Optional OAuth2 scopes to use for -remoteRead.url. Scopes must be delimited by ';'.")
)
// InitSecretFlags must be called after flag.Parse and before any logging
func InitSecretFlags() {
if !*showRemoteReadURL {
flagutil.RegisterSecretFlag("remoteRead.url")
}
}
// Init creates a Querier from provided flag values.
// Returns nil if addr flag wasn't set.
func Init() (datasource.QuerierBuilder, error) {
if *addr == "" {
return nil, nil
}
tr, err := httputils.Transport(*addr, *tlsCertFile, *tlsKeyFile, *tlsCAFile, *tlsServerName, *tlsInsecureSkipVerify)
if err != nil {
return nil, fmt.Errorf("failed to create transport: %w", err)
}
tr.IdleConnTimeout = *idleConnectionTimeout
tr.DialContext = netutil.NewStatDialFunc("vmalert_remoteread")
endpointParams, err := flagutil.ParseJSONMap(*oauth2EndpointParams)
if err != nil {
return nil, fmt.Errorf("cannot parse JSON for -remoteRead.oauth2.endpointParams=%s: %w", *oauth2EndpointParams, err)
}
authCfg, err := utils.AuthConfig(
utils.WithBasicAuth(*basicAuthUsername, *basicAuthPassword, *basicAuthPasswordFile),
utils.WithBearer(*bearerToken, *bearerTokenFile),
utils.WithOAuth(*oauth2ClientID, *oauth2ClientSecret, *oauth2ClientSecretFile, *oauth2TokenURL, *oauth2Scopes, endpointParams),
utils.WithHeaders(*headers))
if err != nil {
return nil, fmt.Errorf("failed to configure auth: %w", err)
}
c := &http.Client{Transport: tr}
return datasource.NewVMStorage(*addr, authCfg, 0, false, c), nil
}