--- title: istio_ca overview: Istio Certificate Authority (CA) layout: pkg-collateral-docs number_of_entries: 3 ---

Istio Certificate Authority (CA)

istio_ca [flags]
Flags Shorthand Description
--alsologtostderr log to standard error as well as files
--ca-cert-ttl <duration> The TTL of self-signed CA root certificate (default `8760h0m0s`)
--cert-chain <string> Speicifies path to the certificate chain file (default ``)
--grpc-hostname <string> Specifies the hostname for GRPC server. (default `localhost`)
--grpc-port <int> Specifies the port number for GRPC server. If unspecified, Istio CA will not server GRPC request. (default `0`)
--istio-ca-storage-namespace <string> Namespace where the Istio CA pods is running. Will not be used if explicit file or other storage mechanism is specified. (default `istio-system`)
--kube-config <string> Specifies path to kubeconfig file. This must be specified when not running inside a Kubernetes pod. (default ``)
--livenessProbeInterval <duration> Interval of updating file for the liveness probe. (default `0s`)
--livenessProbePath <string> Path to the file for the liveness probe. (default ``)
--log_as_json Whether to format output as JSON or in plain console-friendly format
--log_backtrace_at <traceLocation> when logging hits line file:N, emit a stack trace (default `:0`)
--log_callers Include caller information, useful for debugging
--log_dir <string> If non-empty, write log files in this directory (default ``)
--log_output_level <string> The minimum logging level of messages to output, can be one of "debug", "info", "warn", "error", or "none" (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> The minimum logging level at which stack traces are captured, can be one of "debug", "info", "warn", "error", or "none" (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]`)
--logtostderr log to standard error instead of files
--max-workload-cert-ttl <duration> The max TTL of issued workload certificates (default `168h0m0s`)
--namespace <string> Select a namespace for the CA to listen to. If unspecified, Istio CA tries to use the ${NAMESPACE} environment variable. If neither is set, Istio CA listens to all namespaces. (default ``)
--root-cert <string> Specifies path to the root certificate file (default ``)
--self-signed-ca Indicates whether to use auto-generated self-signed CA certificate. When set to true, the '--signing-cert' and '--signing-key' options are ignored.
--self-signed-ca-org <string> The issuer organization used in self-signed CA certificate (default to k8s.cluster.local) (default `k8s.cluster.local`)
--signing-cert <string> Specifies path to the CA signing certificate file (default ``)
--signing-key <string> Specifies path to the CA signing key file (default ``)
--stderrthreshold <severity> logs at or above this threshold go to stderr (default `2`)
--v <Level> -v log level for V logs (default `0`)
--vmodule <moduleSpec> comma-separated list of pattern=N settings for file-filtered logging (default ``)
--workload-cert-grace-period-ratio <float32> The workload certificate rotation grace period, as a ratio of the workload certificate TTL. (default `0.5`)
--workload-cert-min-grace-period <duration> The minimum workload certificate rotation grace period. (default `10m0s`)
--workload-cert-ttl <duration> The TTL of issued workload certificates (default `19h0m0s`)

istio_ca version

Prints out build version information

istio_ca version [flags]
Flags Shorthand Description
--alsologtostderr log to standard error as well as files
--log_as_json Whether to format output as JSON or in plain console-friendly format
--log_backtrace_at <traceLocation> when logging hits line file:N, emit a stack trace (default `:0`)
--log_callers Include caller information, useful for debugging
--log_dir <string> If non-empty, write log files in this directory (default ``)
--log_output_level <string> The minimum logging level of messages to output, can be one of "debug", "info", "warn", "error", or "none" (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> The minimum logging level at which stack traces are captured, can be one of "debug", "info", "warn", "error", or "none" (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]`)
--logtostderr log to standard error instead of files
--short -s Displays a short form of the version information
--stderrthreshold <severity> logs at or above this threshold go to stderr (default `2`)
--v <Level> -v log level for V logs (default `0`)
--vmodule <moduleSpec> comma-separated list of pattern=N settings for file-filtered logging (default ``)