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Add metadata to User-Agent header (#5774)
* extract widely duplicated user agent code into shared package * add useragent package * space * add goos and operator flag * set AGENT_OPERATOR env var * add space * move to internal * switch to deploy mode env * switch to deploy mode env * add deploy mode to helm chart * add deploy mode to deb and rpm * add deploy mode to docker image * tests * regen helm * use binary as fallback deploy mode * fix test * changelog
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| // package useragent provides a consistent way to get a user agent for outbound http requests from Grafana Agent. | ||
| // The default User-Agent is `GrafanaAgent/$VERSION($MODE)` | ||
| // Where version is the build version of the agent and MODE is one of "static" or "flow". | ||
| package useragent | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| "runtime" | ||
| "strings" | ||
|
|
||
| "github.com/grafana/agent/pkg/build" | ||
| ) | ||
|
|
||
| const ( | ||
| deployModeEnv = "AGENT_DEPLOY_MODE" | ||
| modeEnv = "AGENT_MODE" | ||
| ) | ||
|
|
||
| // settable by tests | ||
| var goos = runtime.GOOS | ||
|
|
||
| func Get() string { | ||
| parenthesis := "" | ||
| metadata := []string{} | ||
| if mode := getRunMode(); mode != "" { | ||
| metadata = append(metadata, mode) | ||
| } | ||
| metadata = append(metadata, goos) | ||
| if op := getDeployMode(); op != "" { | ||
| metadata = append(metadata, op) | ||
| } | ||
| if len(metadata) > 0 { | ||
| parenthesis = fmt.Sprintf(" (%s)", strings.Join(metadata, "; ")) | ||
| } | ||
| return fmt.Sprintf("GrafanaAgent/%s%s", build.Version, parenthesis) | ||
| } | ||
|
|
||
| // getRunMode attempts to get agent mode, using `unknown` for invalid values. | ||
| func getRunMode() string { | ||
| key := os.Getenv(modeEnv) | ||
| switch key { | ||
| case "flow": | ||
| return "flow" | ||
| case "static", "": | ||
| return "static" | ||
| default: | ||
| return "unknown" | ||
| } | ||
| } | ||
|
|
||
| func getDeployMode() string { | ||
| op := os.Getenv(deployModeEnv) | ||
| // only return known modes. Use "binary" as a default catch-all. | ||
| switch op { | ||
| case "operator", "helm", "docker", "deb", "rpm", "brew": | ||
| return op | ||
| } | ||
| return "binary" | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| package useragent | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/grafana/agent/pkg/build" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| func TestUserAgent(t *testing.T) { | ||
| build.Version = "v1.2.3" | ||
| tests := []struct { | ||
| Name string | ||
| Mode string | ||
| Expected string | ||
| DeployMode string | ||
| GOOS string | ||
| }{ | ||
| { | ||
| Name: "basic", | ||
| Mode: "", | ||
| Expected: "GrafanaAgent/v1.2.3 (static; linux; binary)", | ||
| GOOS: "linux", | ||
| }, | ||
| { | ||
| Name: "flow", | ||
| Mode: "flow", | ||
| Expected: "GrafanaAgent/v1.2.3 (flow; windows; binary)", | ||
| GOOS: "windows", | ||
| }, | ||
| { | ||
| Name: "static", | ||
| Mode: "static", | ||
| Expected: "GrafanaAgent/v1.2.3 (static; darwin; binary)", | ||
| GOOS: "darwin", | ||
| }, | ||
| { | ||
| Name: "unknown", | ||
| Mode: "blahlahblah", | ||
| // unknown mode, should not happen. But we will substitute 'unknown' to avoid allowing arbitrary cardinality. | ||
| Expected: "GrafanaAgent/v1.2.3 (unknown; freebsd; binary)", | ||
| GOOS: "freebsd", | ||
| }, | ||
| { | ||
| Name: "operator", | ||
| Mode: "static", | ||
| DeployMode: "operator", | ||
| Expected: "GrafanaAgent/v1.2.3 (static; linux; operator)", | ||
| GOOS: "linux", | ||
| }, | ||
| { | ||
| Name: "deb", | ||
| Mode: "flow", | ||
| DeployMode: "deb", | ||
| Expected: "GrafanaAgent/v1.2.3 (flow; linux; deb)", | ||
| GOOS: "linux", | ||
| }, | ||
| { | ||
| Name: "rpm", | ||
| Mode: "static", | ||
| DeployMode: "rpm", | ||
| Expected: "GrafanaAgent/v1.2.3 (static; linux; rpm)", | ||
| GOOS: "linux", | ||
| }, | ||
| { | ||
| Name: "docker", | ||
| Mode: "flow", | ||
| DeployMode: "docker", | ||
| Expected: "GrafanaAgent/v1.2.3 (flow; linux; docker)", | ||
| GOOS: "linux", | ||
| }, | ||
| { | ||
| Name: "helm", | ||
| Mode: "flow", | ||
| DeployMode: "helm", | ||
| Expected: "GrafanaAgent/v1.2.3 (flow; linux; helm)", | ||
| GOOS: "linux", | ||
| }, | ||
| } | ||
| for _, tst := range tests { | ||
| t.Run(tst.Name, func(t *testing.T) { | ||
| goos = tst.GOOS | ||
| t.Setenv(deployModeEnv, tst.DeployMode) | ||
| t.Setenv(modeEnv, tst.Mode) | ||
| actual := Get() | ||
| require.Equal(t, tst.Expected, actual) | ||
| }) | ||
| } | ||
| } |
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