pkg/option: add metrics-label-filter flag

add metrics-label-filter
add example config

Signed-off-by: Jack-R-lantern <tjdfkr2421@gmail.com>

docs/content/en/docs/reference/daemon-flags.md

@@ -44,6 +44,7 @@ Flags:
       --kmods strings                             List of kernel modules to load symbols from
       --log-format string                         Set log format (default "text")
       --log-level string                          Set log level (default "info")
+      --metrics-label-filter string               Comma-separated list of enabled metric labels. (e.g. "namespace,workload,pod,binary") By default all labels are enabled.
       --metrics-server string                     Metrics server address (e.g. ':2112'). Disabled by default
       --netns-dir string                          Network namespace dir (default "/var/run/docker/netns/")
       --process-cache-size int                    Size of the process cache (default 65536)

examples/configuration/tetragon.yaml

@@ -37,6 +37,7 @@ kernel:
 log-format: text
 log-level: info
 metrics-server:
+metrics-label-filter:
 netns-dir: /var/run/docker/netns/
 pprof-addr:
 process-cache-size: 65536

pkg/option/flags.go

@@ -205,6 +205,7 @@ func AddFlags(flags *pflag.FlagSet) {
 	flags.String(KeyK8sKubeConfigPath, "", "Absolute path of the kubernetes kubeconfig file")
 	flags.Bool(KeyEnableProcessAncestors, true, "Include ancestors in process exec events")
 	flags.String(KeyMetricsServer, "", "Metrics server address (e.g. ':2112'). Disabled by default")
+	flags.String(KeyMetricsLabelFilter, "", "Comma-separated list of enabled metric labels. (e.g. \"namespace,workload,pod,binary\") By default all labels are enabled.")
 	flags.String(KeyServerAddress, "localhost:54321", "gRPC server address (e.g. 'localhost:54321' or 'unix:///var/run/tetragon/tetragon.sock'")
 	flags.String(KeyGopsAddr, "", "gops server address (e.g. 'localhost:8118'). Disabled by default")
 	flags.Bool(KeyEnableProcessCred, false, "Enable process_cred events")