// Start UDS log server
	udsSockDir := t.TempDir()
	udsSock := filepath.Join(udsSockDir, "cni.sock")
	logger := NewUDSLogger()
	pluginLog.SetOutputLevel(log.DebugLevel) // this will be configured by global.logging.level
	stop := make(chan struct{})
	defer close(stop)
	assert.NoError(t, logger.StartUDSLogServer(udsSock, stop))

	// Configure log to tee to UDS server
	stdout := os.Stdout
	r, w, _ := os.Pipe()
	os.Stdout = w

	IstioConfig = env.Register("ISTIOCONFIG", defaultIstioctlConfig,
		"Default values for istioctl flags").Get()

	LoggingOptions = defaultLogOptions()

	// scope is for dev logging.  Warning: log levels are not set by --log_output_level until command is Run().
	Scope = log.RegisterScope("cli", "istioctl")
)

func defaultLogOptions() *log.Options {
	o := log.DefaultOptions()

# We set up anonymous authentication as this is for demos.
auth:
  strategy: anonymous
deployment:
  pod_labels:
    sidecar.istio.io/inject: "false"
  accessible_namespaces:
  - '**'
  ingress_enabled: false
login_token:
  signing_key: CHANGEME00000000
external_services:
  # Kiali will not start up without tracing service. We don't want to require it.
  tracing:

    - --proxyComponentLogLevel={{ annotation .ObjectMeta `sidecar.istio.io/componentLogLevel` .Values.global.proxy.componentLogLevel }}
    - --log_output_level={{ annotation .ObjectMeta `sidecar.istio.io/agentLogLevel` .Values.global.logging.level }}
  {{- if .Values.global.sts.servicePort }}
    - --stsPort={{ .Values.global.sts.servicePort }}
  {{- end }}
  {{- if .Values.global.logAsJson }}
    - --log_as_json
  {{- end }}

        - {{ annotation .ObjectMeta `sidecar.istio.io/componentLogLevel` .Values.global.proxy.componentLogLevel | quote}}
        - --log_output_level
        - {{ annotation .ObjectMeta `sidecar.istio.io/agentLogLevel` .Values.global.logging.level | quote}}
      {{- if .Values.global.sts.servicePort }}
        - --stsPort={{ .Values.global.sts.servicePort }}
      {{- end }}
      {{- if .Values.global.logAsJson }}
        - --log_as_json

        - {{ annotation .ObjectMeta `sidecar.istio.io/componentLogLevel` .Values.global.proxy.componentLogLevel | quote}}
        - --log_output_level
        - {{ annotation .ObjectMeta `sidecar.istio.io/agentLogLevel` .Values.global.logging.level | quote}}
        {{- if .Values.global.logAsJson }}
        - --log_as_json
        {{- end }}
        env:
        - name: ISTIO_META_SERVICE_ACCOUNT
          valueFrom:
            fieldRef:

Waret <******@****.***> 1570024046 +0800

description: Optional. items: properties: disabled: description: Controls logging. nullable: true type: boolean filter: description: Optional. properties: expression: description: CEL expression for selecting when requests/connections should be logged. type: string type: object match: description: Allows tailoring of logging behavior to specific conditions. properties: mode: description: This determines whether or not to apply the access logging configuration based on the direction of traffic relative to the...

```yaml
apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
spec:
  profile: sds
  values:
    global:
      logging:
        level: "default:warning" # override from info
```

Values overrides can also be specified for a particular component
 ([samples/values-pilot.yaml](samples/values-pilot.yaml)):

```yaml

message MatchCondition {
  // Name is an identifier for this match condition, used for strategic merging of MatchConditions,
  // as well as providing an identifier for logging purposes. A good name should be descriptive of
  // the associated expression.
  // Name must be a qualified name consisting of alphanumeric characters, '-', '_' or '.', and