Package : istio.networking.v1alpha3



Table of Contents


Field Type Label Description
servers []istio.networking.v1alpha3.Server repeated A list of server specifications.
selector []istio.networking.v1alpha3.Gateway.SelectorEntry repeated One or more labels that indicate a specific set of pods/VMs on which this gateway configuration should be applied. By default workloads are searched across all namespaces based on label selectors. This implies that a gateway resource in the namespace “foo” can select pods in the namespace “bar” based on labels. This behavior can be controlled via the PILOT_SCOPE_GATEWAY_TO_NAMESPACE environment variable in istiod. If this variable is set to true, the scope of label search is restricted to the configuration namespace in which the the resource is present. In other words, the Gateway resource must reside in the same namespace as the gateway workload instance. If selector is nil, the Gateway will be applied to all workloads.


Field Type Label Description
key string
value string


Field Type Label Description
number uint32 A valid non-negative integer port number.
protocol string The protocol exposed on the port. MUST BE one of HTTP
name string Label assigned to the port.
targetPort uint32 The port number on the endpoint where the traffic will be received. Applicable only when used with ServiceEntries.


Field Type Label Description
port istio.networking.v1alpha3.Port The Port on which the proxy should listen for incoming connections.
bind string The ip or the Unix domain socket to which the listener should be bound to. Format: x.x.x.x or unix:///path/to/uds or unix://@foobar (Linux abstract namespace). When using Unix domain sockets, the port number should be 0. This can be used to restrict the reachability of this server to be gateway internal only. This is typically used when a gateway needs to communicate to another mesh service e.g. publishing metrics. In such case, the server created with the specified bind will not be available to external gateway clients.
hosts []string repeated One or more hosts exposed by this gateway. While typically applicable to HTTP services, it can also be used for TCP services using TLS with SNI. A host is specified as a dnsName with an optional namespace/ prefix. The dnsName should be specified using FQDN format, optionally including a wildcard character in the left-most component (e.g., prod/* Set the dnsName to * to select all VirtualService hosts from the specified namespace (e.g.,prod/*).
The namespace can be set to * or ., representing any or the current namespace, respectively. For example, */ selects the service from any available namespace while ./ only selects the service from the namespace of the sidecar. The default, if no namespace/ is specified, is */, that is, select services from any namespace. Any associated DestinationRule in the selected namespace will also be used.
A VirtualService must be bound to the gateway and must have one or more hosts that match the hosts specified in a server. The match could be an exact match or a suffix match with the server's hosts. For example, if the server's hosts specifies *, a VirtualService with hosts or will match. However, a VirtualService with host or will not match.
NOTE: Only virtual services exported to the gateway's namespace (e.g., exportTo value of *) can be referenced. Private configurations (e.g., exportTo set to .) will not be available. Refer to the exportTo setting in VirtualService, DestinationRule, and ServiceEntry configurations for details.
tls istio.networking.v1alpha3.ServerTLSSettings Set of TLS related options that govern the server's behavior. Use these options to control if all http requests should be redirected to https, and the TLS modes to use.
defaultEndpoint string The loopback IP endpoint or Unix domain socket to which traffic should be forwarded to by default. Format should be or unix:///path/to/socket or unix://@foobar (Linux abstract namespace). NOT IMPLEMENTED. $hide_from_docs
name string An optional name of the server, when set must be unique across all servers. This will be used for variety of purposes like prefixing stats generated with this name etc.


Field Type Label Description
httpsRedirect bool If set to true, the load balancer will send a 301 redirect for all http connections, asking the clients to use HTTPS.
mode istio.networking.v1alpha3.ServerTLSSettings.TLSmode Optional: Indicates whether connections to this port should be secured using TLS. The value of this field determines how TLS is enforced.
serverCertificate string REQUIRED if mode is SIMPLE or MUTUAL. The path to the file holding the server-side TLS certificate to use.
privateKey string REQUIRED if mode is SIMPLE or MUTUAL. The path to the file holding the server's private key.
caCertificates string REQUIRED if mode is MUTUAL. The path to a file containing certificate authority certificates to use in verifying a presented client side certificate.
credentialName string For gateways running on Kubernetes, the name of the secret that holds the TLS certs including the CA certificates. Applicable only on Kubernetes. The secret (of type generic) should contain the following keys and values: key: <privateKey> and cert: <serverCert>. For mutual TLS, cacert: <CACertificate> can be provided in the same secret or a separate secret named <secret>-cacert. Secret of type tls for server certificates along with ca.crt key for CA certificates is also supported. Only one of server certificates and CA certificate or credentialName can be specified.
subjectAltNames []string repeated A list of alternate names to verify the subject identity in the certificate presented by the client.
verifyCertificateSpki []string repeated An optional list of base64-encoded SHA-256 hashes of the SKPIs of authorized client certificates. Note: When both verify_certificate_hash and verify_certificate_spki are specified, a hash matching either value will result in the certificate being accepted.
verifyCertificateHash []string repeated An optional list of hex-encoded SHA-256 hashes of the authorized client certificates. Both simple and colon separated formats are acceptable. Note: When both verify_certificate_hash and verify_certificate_spki are specified, a hash matching either value will result in the certificate being accepted.
minProtocolVersion istio.networking.v1alpha3.ServerTLSSettings.TLSProtocol Optional: Minimum TLS protocol version.
maxProtocolVersion istio.networking.v1alpha3.ServerTLSSettings.TLSProtocol Optional: Maximum TLS protocol version.
cipherSuites []string repeated Optional: If specified, only support the specified cipher list. Otherwise default to the default cipher list supported by Envoy.


Name Number Description
TLS_AUTO 0 Automatically choose the optimal TLS version.
TLSV1_0 1 TLS version 1.0
TLSV1_1 2 TLS version 1.1
TLSV1_2 3 TLS version 1.2
TLSV1_3 4 TLS version 1.3


Name Number Description
PASSTHROUGH 0 The SNI string presented by the client will be used as the match criterion in a VirtualService TLS route to determine the destination service from the service registry.
SIMPLE 1 Secure connections with standard TLS semantics.
MUTUAL 2 Secure connections to the downstream using mutual TLS by presenting server certificates for authentication.
AUTO_PASSTHROUGH 3 Similar to the passthrough mode, except servers with this TLS mode do not require an associated VirtualService to map from the SNI value to service in the registry. The destination details such as the service/subset/port are encoded in the SNI value. The proxy will forward to the upstream (Envoy) cluster (a group of endpoints) specified by the SNI value. This server is typically used to provide connectivity between services in disparate L3 networks that otherwise do not have direct connectivity between their respective endpoints. Use of this mode assumes that both the source and the destination are using Istio mTLS to secure traffic.
ISTIO_MUTUAL 4 Secure connections from the downstream using mutual TLS by presenting server certificates for authentication. Compared to Mutual mode, this mode uses certificates, representing gateway workload identity, generated automatically by Istio for mTLS authentication. When this mode is used, all other fields in TLSOptions should be empty.