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Release note (cli change): Added a new HTTP sink to the logging system. This can be configured similarly to other log sinks with the new 'http-servers' and 'http-defaults' sections of the logging config passed via the "--log" or "--log-config-file" command line flags.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| // Copyright 2020 The Cockroach Authors. | ||
| // | ||
| // Use of this software is governed by the Business Source License | ||
| // included in the file licenses/BSL.txt. | ||
| // | ||
| // As of the Change Date specified in that file, in accordance with | ||
| // the Business Source License, use of this software will be governed | ||
| // by the Apache License, Version 2.0, included in the file | ||
| // licenses/APL.txt. | ||
|
|
||
| package log | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "crypto/tls" | ||
| "fmt" | ||
| "net" | ||
| "net/http" | ||
| "net/url" | ||
| "time" | ||
|
|
||
| "github.com/cockroachdb/cockroach/pkg/cli/exit" | ||
| ) | ||
|
|
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| var insecureTransport http.RoundTripper = &http.Transport{ | ||
| // Same as DefaultTransport... | ||
| Proxy: http.ProxyFromEnvironment, | ||
| DialContext: (&net.Dialer{ | ||
| Timeout: 30 * time.Second, | ||
| KeepAlive: 30 * time.Second, | ||
| }).DialContext, | ||
| ForceAttemptHTTP2: true, | ||
| MaxIdleConns: 100, | ||
| IdleConnTimeout: 90 * time.Second, | ||
| TLSHandshakeTimeout: 10 * time.Second, | ||
| ExpectContinueTimeout: 1 * time.Second, | ||
| // ...except insecure TLS. | ||
| TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, | ||
| } | ||
|
|
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| type httpSinkOptions struct { | ||
| unsafeTLS bool | ||
| timeout time.Duration | ||
| method string | ||
| } | ||
|
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| func newHTTPSink(url string, opt httpSinkOptions) *httpSink { | ||
| hs := &httpSink{ | ||
| client: http.Client{ | ||
| Transport: http.DefaultTransport, | ||
| Timeout: opt.timeout}, | ||
| address: url, | ||
| doRequest: doPost} | ||
|
|
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| if opt.unsafeTLS { | ||
| hs.client.Transport = insecureTransport | ||
| } | ||
|
|
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| if opt.method == http.MethodGet { | ||
| hs.doRequest = doGet | ||
| } | ||
|
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| return hs | ||
| } | ||
|
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| type httpSink struct { | ||
| client http.Client | ||
| address string | ||
| doRequest func(*httpSink, []byte) (*http.Response, error) | ||
| } | ||
|
|
||
| // output emits some formatted bytes to this sink. | ||
| // the sink is invited to perform an extra flush if indicated | ||
| // by the argument. This is set to true for e.g. Fatal | ||
| // entries. | ||
| // | ||
| // The parent logger's outputMu is held during this operation: log | ||
| // sinks must not recursively call into logging when implementing | ||
| // this method. | ||
| func (hs *httpSink) output(extraSync bool, b []byte) (err error) { | ||
| resp, err := hs.doRequest(hs, b) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if resp.StatusCode >= 400 { | ||
| return HTTPLogError{ | ||
| StatusCode: resp.StatusCode, | ||
| Address: hs.address} | ||
| } | ||
| return nil | ||
| } | ||
|
|
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| // emergencyOutput attempts to emit some formatted bytes, and | ||
| // ignores any errors. | ||
| // | ||
| // The parent logger's outputMu is held during this operation: log | ||
| // sinks must not recursively call into logging when implementing | ||
| // this method. | ||
| func (hs *httpSink) emergencyOutput(b []byte) { | ||
| hs.doRequest(hs, b) | ||
| } | ||
|
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| func doPost(hs *httpSink, b []byte) (*http.Response, error) { | ||
| resp, err := hs.client.Post(hs.address, "text/plain", bytes.NewReader(b)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| resp.Body.Close() // don't care about content | ||
| return resp, nil | ||
| } | ||
|
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| func doGet(hs *httpSink, b []byte) (*http.Response, error) { | ||
| resp, err := hs.client.Get(hs.address + "?" + url.QueryEscape(string(b))) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| resp.Body.Close() // don't care about content | ||
| return resp, nil | ||
| } | ||
|
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| // active returns true if this sink is currently active. | ||
| func (*httpSink) active() bool { | ||
| return true | ||
| } | ||
|
|
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| // attachHints attaches some hints about the location of the message | ||
| // to the stack message. | ||
| func (*httpSink) attachHints(stacks []byte) []byte { | ||
| return stacks | ||
| } | ||
|
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| // exitCode returns the exit code to use if the logger decides | ||
| // to terminate because of an error in output(). | ||
| func (*httpSink) exitCode() exit.Code { | ||
| return exit.LoggingNetCollectorUnavailable() | ||
| } | ||
|
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| // HTTPLogError represents an HTTP error status code from a logging request. | ||
| type HTTPLogError struct { | ||
| StatusCode int | ||
| Address string | ||
| } | ||
|
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| func (e HTTPLogError) Error() string { | ||
| return fmt.Sprintf( | ||
| "received %v response attempting to log to [%v]", | ||
| e.StatusCode, e.Address) | ||
| } |
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