sysdump: Log cilium-cli version and arguments

It would be handy to have the cilium-cli version and flags used to
capture the sysdump in cilium-sysdump.log.

Sample outputs:

- No flags:

      % ./cilium sysdump
      🔍 Collecting sysdump with cilium-cli version: v0.11.5-18-gd3a523a1, args: [sysdump]

- With some flags:

      % ./cilium sysdump --hubble-flows-count 10 --hubble-flows-timeout 5s
      🔍 Collecting sysdump with cilium-cli version: v0.11.5-18-gd3a523a1, args: [sysdump --hubble-flows-count 10 --hubble-flows-timeout 5s]

Signed-off-by: Michi Mutsuzaki <[email protected]>

internal/cli/cmd/sysdump.go

@@ -32,7 +32,7 @@ func newCmdSysdump() *cobra.Command {
 			// Silence klog to avoid displaying "throttling" messages - those are expected.
 			klog.SetOutput(io.Discard)
 			// Collect the sysdump.
-			collector, err := sysdump.NewCollector(k8sClient, sysdumpOptions, time.Now())
+			collector, err := sysdump.NewCollector(k8sClient, sysdumpOptions, time.Now(), Version)
 			if err != nil {
 				return fmt.Errorf("failed to create sysdump collector: %v", err)
 			}

sysdump/sysdump.go

@@ -125,7 +125,7 @@ type Collector struct {
 }
 
 // NewCollector returns a new sysdump collector.
-func NewCollector(k KubernetesClient, o Options, startTime time.Time) (*Collector, error) {
+func NewCollector(k KubernetesClient, o Options, startTime time.Time, cliVersion string) (*Collector, error) {
 	c := Collector{
 		Client:    k,
 		Options:   o,
@@ -143,6 +143,7 @@ func NewCollector(k KubernetesClient, o Options, startTime time.Time) (*Collecto
 		return nil, err
 	}
 	c.logDebug("Using %v as a temporary directory", c.sysdumpDir)
+	c.logTask("Collecting sysdump with cilium-cli version: %s, args: %s", cliVersion, os.Args[1:])
 
 	// Grab the Kubernetes nodes for the target cluster.
 	c.logTask("Collecting Kubernetes nodes")