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Spinnaker Services mTLS
This guide describes how to enable mutual TLS (mTLS) between Spinnaker services and is building on top of how to enable TLS. Adding mTLS provides additional security for your Spinnaker services as only validated clients can interact with services when mTLS is enabled.
mTLS is a transport level security measure. When a client connects to a server, as in a TLS connection:
- The server responds with its certificate. Additionally, the server sends a certificate request and a list of Distinguished Names the server recognizes.
- The client verifies the certificate of the server and responds with its own certificate and the Distinguished Name its certificate was (in)directly signed with.
- The server verifies the certificate of the client.
To set up TLS, provide the following:
- For a server:
- Certificate and private key
- Chain of certificates to validate clients
- For a client:
- Certificate and private key to present to the server
- Chain of certificates to validate the server (if self signed)
What you need
In the following sections, you need the same information that you needed for TLS setup:
ca.pem(all Golang servers): the CA certificate in PEM format
[service].crt(each Golang server): the certificate and optionally the private key of the Golang server in PEM format
[service].key(each Golang server): the private key of the Golang server if not bundled with the certificate above
[GOSERVICE]_KEY_PASS(each Golang server): the password to the private key of the server
truststore.p12(all Java clients): a PKCS12 truststore with CA certificate imported
TRUSTSTORE_PASS(all Java clients): the password to the truststore above
[service].p12(each Java server): a PKCS12 keystore containing the certificate and private key of the server
[SERVICE]_KEY_PASS(each Java server): the password to the keystore above
The server certificate will serve as its client certificate to other services. You can generate different certificates and use them in
ok-http-client.key-store* (Java) and
To learn how to generate these files, refer to generating certificates.
Configuration (Java services)
Add the following to each Java service profile:
<deploy>/profiles/<service>-local.yml in Halyard or under
profiles in the SpinnakerService’s profiles:
# Only needed for "server" role server: ssl: enabled: true key-store: <reference to [service].p12> key-store-type: PKCS12 key-store-password: <[SERVICE]_KEY_PASS> trust-store: <reference to ca.p12> trust-store-type: PKCS12 trust-store-password: <TRUSTSTORE_PASS> # Roll out with "want" initially client-auth: need # Needed for all Java services ok-http-client: key-store: <reference to [service].p12> key-store-type: PKCS12 key-store-password: [SERVICE]_KEY_PASS trust-store: <reference to truststore.p12> trust-store-type: PKCS12 trust-store-password: <TRUSTSTORE_PASS>
Configuration (Golang services)
server: ssl: enabled: true certFile: <reference to [service].crt> keyFile: <reference to [service].key if not included in the certFile's PEM> keyPassword: <[GOSERVICE]_KEY_PASS if required> cacertFile: <reference to ca.pem> # Roll out with "want" initially clientAuth: need http: cacertFile: <reference to ca.pem> clientCertFile: <reference to [service].crt> clientKeyFile: <reference to [service.key]> clientKeyPassword: <[GOSERVICE]_KEY_PASS if required>
Changing service endpoints
This section is identical to changing endpoints for TLS.
Changing readiness probe
Change the readiness probe used by Kubernetes from an HTTP request to a TCP probe.
Add the following snippet to each service in
apiVersion: spinnaker.armory.io/v1alpha2 kind: SpinnakerService metadata: name: spinnaker spec: spinnakerConfig: service-settings: <service>: kubernetes: useTcpProbe: true
This can be done by adding the following to each service under
kubernetes: useTcpProbe: true
Important: Version 1.8.2 or later of Halyard Armory is required to support TCP probe.
Apply your changes to your Spinnaker deployment:
kubectl -n <spinnaker namespace> apply -f <SpinnakerService manifest>
hal deploy apply
If Spinnaker services are already using HTTPS, you can roll out mTLS without interruption by making the client certificate optional (
server.ssl.client-auth (Java) and
server.ssl.clientAuth. Then once all the services are stable, rolling out a new configuration with that value set to
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