Tetrate Service BridgeVersion: 1.6.x

Istio internal Group

Istio internal groups only allow grouping DIRECT mode mesh resources in a set of namespaces owned by its parent workspace. This group is aimed for grouping resources not directly related to traffic, security, or gateway like EnvoyFilters and ServiceEntry for instance. Istio internal group is meant to group highly coupled and implementation-detailed oriented istio resources that don't provide any BRIDGE mode guarantees or backward/forward compatibilities that other groups like traffic, security of gateway can provide. Especially, and mainly because resources like EnvoyFilters, are highly customizable and can interfere in unpredictable ways, with any other routing, security, listeners, or filter chains among other configurations that TSB may have setup. Therefore, this group is only meant to be used for users/administrators that are confident with those advanced features, knowing that the defined resources under this group will not interfere with the TSB provided mesh governance functionalities.

The following example creates an istio internal group for resources in ns1, ns2 and ns3 namespaces owned by its parent workspace w1 under tenant mycompany.

apiVersion: istiointernal.tsb.tetrate.io/v2
kind: Group
metadata:
  name: t1
  workspace: w1
  tenant: mycompany
  organization: myorg
spec:
  namespaceSelector:
    names:
    - "*/ns1"
    - "*/ns2"
    - "*/ns3"

It is possible to directly attach Istio APIs such as EnvoyFilter, and ServiceEntry to the istio internal group. These configurations will then pushed to the appropriate Istio control planes.

The following ServiceEntry example declares a few external APIs accessed by internal applications over HTTPS. The sidecar inspects the SNI value in the ClientHello message to route to the appropriate external service.

apiVersion: networking.istio.io/v1beta1
kind: ServiceEntry
metadata:
  name: external-svc-https
  namespace: ns1
  annotations:
    tsb.tetrate.io/organization: myorg
    tsb.tetrate.io/tenant: mycompany
    tsb.tetrate.io/workspace: w1
    tsb.tetrate.io/istioInternalGroup: t1
spec:
  hosts:
  - api.dropboxapi.com
  - www.googleapis.com
  - api.facebook.com
  location: MESH_EXTERNAL
  ports:
  - number: 443
    name: https
    protocol: TLS
  resolution: DNS

The namespace where the Istio APIs are applied will need to be part of the parent istio internal group. In addition, each API object will need to have annotations to indicate the organization, tenant, workspace and the istio internal group to which it belongs to.

Group

An Istio Internal Group only allows grouping DIRECT mode mesh resources in a set of namespaces owned by its parent workspace. This group is aimed for grouping resources not directly related to traffic, security, or gateway like EnvoyFilters and ServiceEntry.

Field	Description	Validation Rule
namespaceSelector	tetrateio.api.tsb.types.v2.NamespaceSelector REQUIRED Set of namespaces owned exclusively by this group. If omitted, applies to all resources owned by the workspace. Use `/` to claim all cluster resources under the workspace.	message = { required: `true` }

Group​

Group