The control-plane components relied on a `--single-namespace` param,
passed from `linkerd install` into each individual component, to
determine which namespaces they were authorized to access, and whether
to support ServiceProfiles. This command-line flag was redundant given
the authorization rules encoded in the parent `linkerd install` output,
via [Cluster]Role[Binding]s.
Modify the control-plane components to query Kubernetes at startup to
determine which namespaces they are authorized to access, and whether
ServiceProfile support is available. This allows removal of the
`--single-namespace` flag on the components.
Also update `bin/test-cleanup` to cleanup the ServiceProfile CRD.
TODO:
- Remove `--single-namespace` flag on `linkerd install`, part of #2164
Signed-off-by: Andrew Seigner <siggy@buoyant.io>
Fixes#2077
When looking up service profiles, Linkerd always looks for the service profile objects in the Linkerd control namespace. This is limiting because service owners who wish to create service profiles may not have write access to the Linkerd control namespace.
Instead, we have the control plane look for the service profile in both the client namespace (as read from the proxy's `proxy_id` field from the GetProfiles request and from the service's namespace. If a service profile exists in both namespaces, the client namespace takes priority. In this way, clients may override the behavior dictated by the service.
Signed-off-by: Alex Leong <alex@buoyant.io>
The `linkerd check` command was doing limited validation on
ServiceProfiles.
Make ServiceProfile validation more complete, specifically validate:
- types of all fields
- presence of required fields
- presence of unknown fields
- recursive fields
Also move all validation code into a new `Validate` function in the
profiles package.
Validation of field types and required fields is handled via
`yaml.UnmarshalStrict` in the `Validate` function. This motivated
migrating from github.com/ghodss/yaml to a fork, sigs.k8s.io/yaml.
Fixes#2190
Andrew Seigner
Alex Leong
Alejandro Pedraza