operator

14 minute read

The Istio operator.

Flags	Description
`--kubeconfig <string>`	Paths to a kubeconfig. Only required if out-of-cluster. (default ``)

operator server

Starts the Istio operator server

operator server [flags]

Flags	Description
`--ctrlz_address <string>`	The IP Address to listen on for the ControlZ introspection facility. Use '*' to indicate all addresses. (default `localhost`)
`--ctrlz_port <uint16>`	The IP port to use for the ControlZ introspection facility (default `9876`)
`--kubeconfig <string>`	Paths to a kubeconfig. Only required if out-of-cluster. (default ``)
`--log_as_json`	Whether to format output as JSON or in plain console-friendly format
`--log_caller <string>`	Comma-separated list of scopes for which to include caller information, scopes can be any of [ads, adsc, all, authn, authorization, ca, default, installer, klog, kube, model, patch, spiffe, telemetry, tpath, translator, trustBundle, util, validation, validationController, wle] (default ``)
`--log_output_level <string>`	Comma-separated minimum per-scope logging level of messages to output, in the form of <scope>:<level>,<scope>:<level>,... where scope can be one of [ads, adsc, all, authn, authorization, ca, default, installer, klog, kube, model, patch, spiffe, telemetry, tpath, translator, trustBundle, util, validation, validationController, wle] and level can be one of [debug, info, warn, error, fatal, none] (default `default:info`)
`--log_rotate <string>`	The path for the optional rotating log file (default ``)
`--log_rotate_max_age <int>`	The maximum age in days of a log file beyond which the file is rotated (0 indicates no limit) (default `30`)
`--log_rotate_max_backups <int>`	The maximum number of log file backups to keep before older files are deleted (0 indicates no limit) (default `1000`)
`--log_rotate_max_size <int>`	The maximum size in megabytes of a log file beyond which the file is rotated (default `104857600`)
`--log_stacktrace_level <string>`	Comma-separated minimum per-scope logging level at which stack traces are captured, in the form of <scope>:<level>,<scope:level>,... where scope can be one of [ads, adsc, all, authn, authorization, ca, default, installer, klog, kube, model, patch, spiffe, telemetry, tpath, translator, trustBundle, util, validation, validationController, wle] and level can be one of [debug, info, warn, error, fatal, none] (default `default:none`)
`--log_target <stringArray>`	The set of paths where to output the log. This can be any path as well as the special values stdout and stderr (default `[stdout]`)

operator version

Prints out build version information

operator version [flags]

Flags	Shorthand	Description
`--kubeconfig <string>`		Paths to a kubeconfig. Only required if out-of-cluster. (default ``)
`--output <string>`	`-o`	One of 'yaml' or 'json'. (default ``)
`--short`	`-s`	Use --short=false to generate full version information

Environment variables

These environment variables affect the behavior of the operator command. Please use with caution as these environment variables are experimental and can change anytime.

Variable Name	Type	Default Value	Description
`CLUSTER_ID`	String	`Kubernetes`	Defines the cluster and service registry that this Istiod instance is belongs to
`ENABLE_CA_SERVER`	Boolean	`true`	If this is set to false, will not create CA server in istiod.
`ENABLE_DEBUG_ON_HTTP`	Boolean	`true`	If this is set to false, the debug interface will not be ebabled on Http, recommended for production
`ENABLE_LEGACY_FSGROUP_INJECTION`	Boolean	`true`	If true, Istiod will set the pod fsGroup to 1337 on injection. This is required for Kubernetes 1.18 and older (see https://github.com/kubernetes/kubernetes/issues/57923 for details) unless JWT_POLICY is "first-party-jwt".
`ENABLE_MULTICLUSTER_HEADLESS`	Boolean	`false`	If true, the DNS name table for a headless service will resolve to same-network endpoints in any cluster.
`ENABLE_WASM_TELEMETRY`	Boolean	`false`	If enabled, Wasm-based telemetry will be enabled.
`EXTERNAL_ISTIOD`	Boolean	`false`	If this is set to true, one Istiod will control remote clusters including CA.
`GCP_METADATA`	String		Pipe separted GCP metadata, schemed as PROJECT_ID\|PROJECT_NUMBER\|CLUSTER_NAME\|CLUSTER_ZONE
`INJECTION_WEBHOOK_CONFIG_NAME`	String	`istio-sidecar-injector`	Name of the mutatingwebhookconfiguration to patch, if istioctl is not used.
`ISTIOD_CUSTOM_HOST`	String		Custom host name of istiod that istiod signs the server cert.
`ISTIO_AGENT_ENABLE_WASM_REMOTE_LOAD_CONVERSION`	Boolean	`true`	If enabled, Istio agent will intercept ECDS resource update, downloads Wasm module, and replaces Wasm module remote load with downloaded local module file.
`ISTIO_BOOTSTRAP`	String
`ISTIO_DEFAULT_REQUEST_TIMEOUT`	Time Duration	`0s`	Default Http and gRPC Request timeout
`ISTIO_DELTA_XDS`	Boolean	`false`	If enabled, pilot will only send the delta configs as opposed to the state of the world on a Resource Request
`ISTIO_GATEWAY_STRIP_HOST_PORT`	Boolean	`false`	If enabled, Gateway will remove any port from host/authority header before any processing of request by HTTP filters or routing.
`ISTIO_GPRC_MAXRECVMSGSIZE`	Integer	`4194304`	Sets the max receive buffer size of gRPC stream in bytes.
`ISTIO_GPRC_MAXSTREAMS`	Integer	`100000`	Sets the maximum number of concurrent grpc streams.
`ISTIO_MULTIROOT_MESH`	Boolean	`false`	If enabled, mesh will support certificates signed by more than one trustAnchor for ISTIO_MUTUAL mTLS
`JWT_POLICY`	String	`third-party-jwt`	The JWT validation policy.
`K8S_INGRESS_NS`	String
`K_REVISION`	String		KNative revision, set if running in knative
`PILOT_CERT_PROVIDER`	String	`istiod`	The provider of Pilot DNS certificate.
`PILOT_DEBOUNCE_AFTER`	Time Duration	`100ms`	The delay added to config/registry events for debouncing. This will delay the push by at least this internal. If no change is detected within this period, the push will happen, otherwise we'll keep delaying until things settle, up to a max of PILOT_DEBOUNCE_MAX.
`PILOT_DEBOUNCE_MAX`	Time Duration	`10s`	The maximum amount of time to wait for events while debouncing. If events keep showing up with no breaks for this time, we'll trigger a push.
`PILOT_DISTRIBUTION_HISTORY_RETENTION`	Time Duration	`1m0s`	If enabled, Pilot will keep track of old versions of distributed config for this duration.
`PILOT_ENABLED_SERVICE_APIS`	Boolean	`true`	If this is set to true, support for Kubernetes gateway-api (github.com/kubernetes-sigs/gateway-api) will be enabled. In addition to this being enabled, the gateway-api CRDs need to be installed.
`PILOT_ENABLE_ANALYSIS`	Boolean	`false`	If enabled, pilot will run istio analyzers and write analysis errors to the Status field of any Istio Resources
`PILOT_ENABLE_CONFIG_DISTRIBUTION_TRACKING`	Boolean	`true`	If enabled, Pilot will assign meaningful nonces to each Envoy configuration message, and allow users to interrogate which envoy has which config from the debug interface.
`PILOT_ENABLE_CROSS_CLUSTER_WORKLOAD_ENTRY`	Boolean	`false`	If enabled, pilot will read WorkloadEntry from other clusters, selectable by Services in that cluster.
`PILOT_ENABLE_DESTINATION_RULE_INHERITANCE`	Boolean	`false`	If set, workload specific DestinationRules will inherit configurations settings from mesh and namespace level rules
`PILOT_ENABLE_EDS_DEBOUNCE`	Boolean	`true`	If enabled, Pilot will include EDS pushes in the push debouncing, configured by PILOT_DEBOUNCE_AFTER and PILOT_DEBOUNCE_MAX. EDS pushes may be delayed, but there will be fewer pushes. By default this is enabled
`PILOT_ENABLE_EDS_FOR_HEADLESS_SERVICES`	Boolean	`false`	If enabled, for headless service in Kubernetes, pilot will send endpoints over EDS, allowing the sidecar to load balance among pods in the headless service. This feature should be enabled if applications access all services explicitly via a HTTP proxy port in the sidecar.
`PILOT_ENABLE_FLOW_CONTROL`	Boolean	`false`	If enabled, pilot will wait for the completion of a receive operation beforeexecuting a push operation. This is a form of flow control and is useful inenvironments with high rates of push requests to each gateway. By default,this is false.
`PILOT_ENABLE_HEADLESS_SERVICE_POD_LISTENERS`	Boolean	`true`	If enabled, for a headless service/stateful set in Kubernetes, pilot will generate an outbound listener for each pod in a headless service. This feature should be disabled if headless services have a large number of pods.
`PILOT_ENABLE_INBOUND_PASSTHROUGH`	Boolean	`true`	If enabled, inbound clusters will be configured as ORIGINAL_DST clusters. When disabled, requests are always sent to localhost. The primary implication of this is that when enabled, binding to POD_IP will work while localhost will not; when disable, bind to POD_IP will not work, while localhost will. The enabled behavior matches the behavior without Istio enabled at all; this flag exists only for backwards compatibility. Regardless of this setting, the configuration can be overridden with the Sidecar.Ingress.DefaultEndpoint configuration.
`PILOT_ENABLE_ISTIO_TAGS`	Boolean	`true`	Determines whether or not trace spans generated by Envoy will include Istio-specific tags.
`PILOT_ENABLE_K8S_SELECT_WORKLOAD_ENTRIES`	Boolean	`true`	If enabled, Kubernetes services with selectors will select workload entries with matching labels. It is safe to disable it if you are quite sure you don't need this feature
`PILOT_ENABLE_LEGACY_AUTO_PASSTHROUGH`	Boolean	`false`	If enabled, pilot will allow any upstream cluster to be used with AUTO_PASSTHROUGH. This option is intended for backwards compatibility only and is not secure with untrusted downstreams; it will be removed in the future.
`PILOT_ENABLE_MCS_SERVICEEXPORT`	Boolean	`false`	If enabled, Pilot will generate MCS ServiceExport objects for every non cluster-local service in the cluster
`PILOT_ENABLE_MONGO_FILTER`	Boolean	`true`	EnableMongoFilter enables injection of `envoy.filters.network.mongo_proxy` in the filter chain.
`PILOT_ENABLE_MYSQL_FILTER`	Boolean	`false`	EnableMysqlFilter enables injection of `envoy.filters.network.mysql_proxy` in the filter chain.
`PILOT_ENABLE_PROTOCOL_SNIFFING_FOR_INBOUND`	Boolean	`true`	If enabled, protocol sniffing will be used for inbound listeners whose port protocol is not specified or unsupported
`PILOT_ENABLE_PROTOCOL_SNIFFING_FOR_OUTBOUND`	Boolean	`true`	If enabled, protocol sniffing will be used for outbound listeners whose port protocol is not specified or unsupported
`PILOT_ENABLE_REDIS_FILTER`	Boolean	`false`	EnableRedisFilter enables injection of `envoy.filters.network.redis_proxy` in the filter chain.
`PILOT_ENABLE_ROUTE_COLLAPSE_OPTIMIZATION`	Boolean	`true`	If true, Pilot will merge virtual hosts with the same routes into a single virtual host, as an optimization.
`PILOT_ENABLE_SERVICEENTRY_SELECT_PODS`	Boolean	`true`	If enabled, service entries with selectors will select pods from the cluster. It is safe to disable it if you are quite sure you don't need this feature
`PILOT_ENABLE_STATUS`	Boolean	`false`	If enabled, pilot will update the CRD Status field of all istio resources with reconciliation status.
`PILOT_ENABLE_VIRTUAL_SERVICE_DELEGATE`	Boolean	`true`	If set to false, virtualService delegate will not be supported.
`PILOT_ENABLE_WORKLOAD_ENTRY_AUTOREGISTRATION`	Boolean	`true`	Enables auto-registering WorkloadEntries based on associated WorkloadGroups upon XDS connection by the workload.
`PILOT_ENABLE_WORKLOAD_ENTRY_HEALTHCHECKS`	Boolean	`true`	Enables automatic health checks of WorkloadEntries based on the config provided in the associated WorkloadGroup
`PILOT_ENABLE_XDS_CACHE`	Boolean	`true`	If true, Pilot will cache XDS responses.
`PILOT_ENABLE_XDS_IDENTITY_CHECK`	Boolean	`true`	If enabled, pilot will authorize XDS clients, to ensure they are acting only as namespaces they have permissions for.
`PILOT_ENDPOINT_TELEMETRY_LABEL`	Boolean	`true`	If true, pilot will add telemetry related metadata to Endpoint resource, which will be consumed by telemetry filter.
`PILOT_ENVOY_FILTER_STATS`	Boolean	`false`	If true, Pilot will collect metrics for envoy filter operations.
`PILOT_FILTER_GATEWAY_CLUSTER_CONFIG`	Boolean	`false`
`PILOT_FLOW_CONTROL_TIMEOUT`	Time Duration	`15s`	If set, the max amount of time to delay a push by. Depends on PILOT_ENABLE_FLOW_CONTROL.
`PILOT_HTTP10`	Boolean	`false`	Enables the use of HTTP 1.0 in the outbound HTTP listeners, to support legacy applications.
`PILOT_HTTP_DELAYED_CLOSE_TIMEOUT`	Time Duration	`1s`	The delayed close timeout is for downstream HTTP connections. This should be set to a high value or disable it when peer is reading large chunk of data and to give an opportunity to initiate the close sequence properly. A value of 0s disables this
`PILOT_INBOUND_PROTOCOL_DETECTION_TIMEOUT`	Time Duration	`1s`	Protocol detection timeout for inbound listener
`PILOT_JWT_ENABLE_REMOTE_JWKS`	Boolean	`false`	If enabled, checks to see if the configured JwksUri in RequestAuthentication is a mesh cluster URL and configures Remote Jwks to let Envoy fetch the Jwks instead of Istiod.
`PILOT_JWT_PUB_KEY_REFRESH_INTERVAL`	Time Duration	`20m0s`	The interval for istiod to fetch the jwks_uri for the jwks public key.
`PILOT_PUSH_THROTTLE`	Integer	`100`	Limits the number of concurrent pushes allowed. On larger machines this can be increased for faster pushes
`PILOT_REMOTE_CLUSTER_TIMEOUT`	Time Duration	`30s`	After this timeout expires, pilot can become ready without syncing data from clusters added via remote-secrets. Setting the timeout to 0 disables this behavior.
`PILOT_SCOPE_GATEWAY_TO_NAMESPACE`	Boolean	`false`	If enabled, a gateway workload can only select gateway resources in the same namespace. Gateways with same selectors in different namespaces will not be applicable.
`PILOT_SIDECAR_USE_REMOTE_ADDRESS`	Boolean	`false`	UseRemoteAddress sets useRemoteAddress to true for side car outbound listeners.
`PILOT_SKIP_VALIDATE_TRUST_DOMAIN`	Boolean	`false`	Skip validating the peer is from the same trust domain when mTLS is enabled in authentication policy
`PILOT_STATUS_BURST`	Integer	`500`	If status is enabled, controls the Burst rate with which status will be updated. See https://godoc.org/k8s.io/client-go/rest#Config Burst
`PILOT_STATUS_MAX_WORKERS`	Integer	`100`	The maximum number of workers Pilot will use to keep configuration status up to date. Smaller numbers will result in higher status latency, but larger numbers may impact CPU in high scale environments.
`PILOT_STATUS_QPS`	Floating-Point	`100`	If status is enabled, controls the QPS with which status will be updated. See https://godoc.org/k8s.io/client-go/rest#Config QPS
`PILOT_TRACE_SAMPLING`	Floating-Point	`1`	Sets the mesh-wide trace sampling percentage. Should be 0.0 - 100.0. Precision to 0.01. Default is 1.0.
`PILOT_USE_ENDPOINT_SLICE`	Boolean	`false`	If enabled, Pilot will use EndpointSlices as the source of endpoints for Kubernetes services. By default, this is false, and Endpoints will be used. This requires the Kubernetes EndpointSlice controller to be enabled. Currently this is mutual exclusive - either Endpoints or EndpointSlices will be used
`PILOT_USE_TARGET_PORT_FOR_GATEWAY_ROUTES`	Boolean	`true`	If true, routes will use the target port of the gateway service in the route name, not the service port.
`PILOT_WORKLOAD_ENTRY_GRACE_PERIOD`	Time Duration	`10s`	The amount of time an auto-registered workload can remain disconnected from all Pilot instances before the associated WorkloadEntry is cleaned up.
`PILOT_XDS_CACHE_SIZE`	Integer	`20000`	The maximum number of cache entries for the XDS cache.
`PILOT_XDS_CACHE_STATS`	Boolean	`false`	If true, Pilot will collect metrics for XDS cache efficiency.
`PILOT_XDS_SEND_TIMEOUT`	Time Duration	`0s`	The timeout to send the XDS configuration to proxies. After this timeout is reached, Pilot will discard that push.
`POD_NAME`	String
`REQUIRE_3P_TOKEN`	Boolean	`false`	Reject k8s default tokens, without audience. If false, default K8S token will be accepted
`SHARED_MESH_CONFIG`	String		Additional config map to load for shared MeshConfig settings. The standard mesh config will take precedence.
`SPIFFE_BUNDLE_ENDPOINTS`	String		The SPIFFE bundle trust domain to endpoint mappings. Istiod retrieves the root certificate from each SPIFFE bundle endpoint and uses it to verify client certifiates from that trust domain. The endpoint must be compliant to the SPIFFE Bundle Endpoint standard. For details, please refer to https://github.com/spiffe/spiffe/blob/master/standards/SPIFFE_Trust_Domain_and_Bundle.md . No need to configure this for root certificates issued via Istiod or web-PKI based root certificates. Use \|\| between <trustdomain, endpoint> tuples. Use \| as delimiter between trust domain and endpoint in each tuple. For example: foo\|https://url/for/foo\|\|bar\|https://url/for/bar
`TOKEN_AUDIENCES`	String	`istio-ca`	A list of comma separated audiences to check in the JWT token before issuing a certificate. The token is accepted if it matches with one of the audiences
`UNSAFE_ENABLE_ADMIN_ENDPOINTS`	Boolean	`false`	If this is set to true, dangerous admin endpoins will be exposed on the debug interface. Not recommended for production.
`UNSAFE_PILOT_ENABLE_RUNTIME_ASSERTIONS`	Boolean	`false`	If enabled, addition runtime asserts will be performed. These checks are both expensive and panic on failure. As a result, this should be used only for testing.
`XDS_AUTH`	Boolean	`true`	If true, will authenticate XDS clients.
`XDS_AUTH_PLAINTEXT`	Boolean	`false`	Authenticate plain text requests - used if Istiod is behind a gateway handling TLS

Exported metrics

Metric Name	Type	Description
`auto_registration_deletes_total`	`Sum`	Total number of auto registration cleaned up by periodic timer.
`auto_registration_errors_total`	`Sum`	Total number of auto registration errors.
`auto_registration_success_total`	`Sum`	Total number of successful auto registrations.
`auto_registration_unregister_total`	`Sum`	Total number of unregistrations.
`auto_registration_updates_total`	`Sum`	Total number of auto registration updates.
`cache_flush_total`	`Sum`	number of times operator cache was flushed
`controller_sync_errors_total`	`Sum`	Total number of errorMetric syncing controllers.
`cr_deletion_total`	`Sum`	Number of IstioOperator CR deleted
`cr_merge_failure_total`	`Sum`	Number of IstioOperator CR merge failures
`cr_validation_error_total`	`Sum`	Number of IstioOperator CR validation failures
`endpoint_no_pod`	`LastValue`	Endpoints without an associated pod.
`galley_validation_config_delete_error`	`Count`	k8s webhook configuration delete error
`galley_validation_config_load`	`Count`	k8s webhook configuration (re)loads
`galley_validation_config_load_error`	`Count`	k8s webhook configuration (re)load error
`galley_validation_config_update_error`	`Count`	k8s webhook configuration update error
`galley_validation_config_updates`	`Count`	k8s webhook configuration updates
`get_cr_error_total`	`Sum`	Number of times fetching CR from apiserver failed
`istio_build`	`LastValue`	Istio component build info
`istiod_managed_clusters`	`LastValue`	Number of clusters managed by istiod
`legacy_path_translation_total`	`Sum`	Number of times a legacy API path is translated
`manifest_patch_error_total`	`Sum`	Number of times K8S patch overlays failed
`manifest_render_error_total`	`Sum`	Number of times error occurred during rendering output manifest
`num_outgoing_retries`	`Sum`	Number of outgoing retry requests (e.g. to a token exchange server, CA, etc.)
`owned_resource_total`	`LastValue`	Number of resources currently owned by the operator
`pilot_conflict_inbound_listener`	`LastValue`	Number of conflicting inbound listeners.
`pilot_conflict_outbound_listener_http_over_current_tcp`	`LastValue`	Number of conflicting wildcard http listeners with current wildcard tcp listener.
`pilot_conflict_outbound_listener_tcp_over_current_http`	`LastValue`	Number of conflicting wildcard tcp listeners with current wildcard http listener.
`pilot_conflict_outbound_listener_tcp_over_current_tcp`	`LastValue`	Number of conflicting tcp listeners with current tcp listener.
`pilot_destrule_subsets`	`LastValue`	Duplicate subsets across destination rules for same host
`pilot_duplicate_envoy_clusters`	`LastValue`	Duplicate envoy clusters caused by service entries with same hostname
`pilot_eds_no_instances`	`LastValue`	Number of clusters without instances.
`pilot_endpoint_not_ready`	`LastValue`	Endpoint found in unready state.
`pilot_inbound_updates`	`Sum`	Total number of updates received by pilot.
`pilot_jwks_resolver_network_fetch_fail_total`	`Sum`	Total number of failed network fetch by pilot jwks resolver
`pilot_jwks_resolver_network_fetch_success_total`	`Sum`	Total number of successfully network fetch by pilot jwks resolver
`pilot_k8s_cfg_events`	`Sum`	Events from k8s config.
`pilot_k8s_endpoints_pending_pod`	`LastValue`	Number of endpoints that do not currently have any corresponding pods.
`pilot_k8s_endpoints_with_no_pods`	`Sum`	Endpoints that does not have any corresponding pods.
`pilot_k8s_reg_events`	`Sum`	Events from k8s registry.
`pilot_no_ip`	`LastValue`	Pods not found in the endpoint table, possibly invalid.
`pilot_proxy_convergence_time`	`Distribution`	Delay in seconds between config change and a proxy receiving all required configuration.
`pilot_proxy_queue_time`	`Distribution`	Time in seconds, a proxy is in the push queue before being dequeued.
`pilot_push_triggers`	`Sum`	Total number of times a push was triggered, labeled by reason for the push.
`pilot_sds_certificate_errors_total`	`Sum`	Total number of failures to fetch SDS key and certificate.
`pilot_services`	`LastValue`	Total services known to pilot.
`pilot_total_rejected_configs`	`Sum`	Total number of configs that Pilot had to reject or ignore.
`pilot_total_xds_internal_errors`	`Sum`	Total number of internal XDS errors in pilot.
`pilot_total_xds_rejects`	`Sum`	Total number of XDS responses from pilot rejected by proxy.
`pilot_virt_services`	`LastValue`	Total virtual services known to pilot.
`pilot_vservice_dup_domain`	`LastValue`	Virtual services with dup domains.
`pilot_xds`	`LastValue`	Number of endpoints connected to this pilot using XDS.
`pilot_xds_cds_reject`	`LastValue`	Pilot rejected CDS configs.
`pilot_xds_config_size_bytes`	`Distribution`	Distribution of configuration sizes pushed to clients
`pilot_xds_delayed_push_timeouts_total`	`Sum`	Total number of XDS pushes that are delayed and timed out
`pilot_xds_delayed_pushes_total`	`Sum`	Total number of XDS pushes that are delayed.
`pilot_xds_eds_reject`	`LastValue`	Pilot rejected EDS.
`pilot_xds_expired_nonce`	`Sum`	Total number of XDS requests with an expired nonce.
`pilot_xds_lds_reject`	`LastValue`	Pilot rejected LDS.
`pilot_xds_push_context_errors`	`Sum`	Number of errors (timeouts) initiating push context.
`pilot_xds_push_time`	`Distribution`	Total time in seconds Pilot takes to push lds, rds, cds and eds.
`pilot_xds_pushes`	`Sum`	Pilot build and send errors for lds, rds, cds and eds.
`pilot_xds_rds_reject`	`LastValue`	Pilot rejected RDS.
`pilot_xds_send_time`	`Distribution`	Total time in seconds Pilot takes to send generated configuration.
`pilot_xds_write_timeout`	`Sum`	Pilot XDS response write timeouts.
`remote_cluster_sync_timeouts_total`	`Sum`	Number of times remote clusters took too long to sync, causing slow startup that excludes remote clusters.
`render_manifest_total`	`Sum`	Number of component manifests rendered
`resource_creation_total`	`Sum`	Number of resources created by the operator
`resource_deletion_total`	`Sum`	Number of resources deleted by the operator
`resource_prune_total`	`Sum`	Number of resources pruned by the operator
`resource_update_total`	`Sum`	Number of resources updated by the operator
`version`	`LastValue`	Version of operator binary
`xds_cache_evictions`	`Sum`	Total number of xds cache evictions.
`xds_cache_reads`	`Sum`	Total number of xds cache xdsCacheReads.
`xds_cache_size`	`LastValue`	Current size of xds cache