PeerAuthentication
PeerAuthentication defines mutual TLS (mTLS) requirements for incoming connections.
In sidecar mode, PeerAuthentication determines whether or not mTLS is allowed or required for connections to an Envoy proxy sidecar.
In ambient mode, security is transparently enabled for a pod by the ztunnel node agent.
(Traffic between proxies uses the HBONE protocol, which includes encryption with mTLS.)
Because of this, DISABLE
mode is not supported.
STRICT
mode is useful to ensure that connections that bypass the mesh are not possible.
Examples:
Policy to require mTLS traffic for all workloads under namespace foo
:
apiVersion: security.istio.io/v1
kind: PeerAuthentication
metadata:
name: default
namespace: foo
spec:
mtls:
mode: STRICT
For mesh level, put the policy in root-namespace according to your Istio installation.
Policies to allow both mTLS and plaintext traffic for all workloads under namespace foo
, but
require mTLS for workload finance
.
apiVersion: security.istio.io/v1
kind: PeerAuthentication
metadata:
name: default
namespace: foo
spec:
mtls:
mode: PERMISSIVE
---
apiVersion: security.istio.io/v1
kind: PeerAuthentication
metadata:
name: finance
namespace: foo
spec:
selector:
matchLabels:
app: finance
mtls:
mode: STRICT
Policy that enables strict mTLS for all finance
workloads, but leaves the port 8080
to
plaintext. Note the port value in the portLevelMtls
field refers to the port
of the workload, not the port of the Kubernetes service.
apiVersion: security.istio.io/v1
kind: PeerAuthentication
metadata:
name: default
namespace: foo
spec:
selector:
matchLabels:
app: finance
mtls:
mode: STRICT
portLevelMtls:
8080:
mode: DISABLE
Policy that inherits mTLS mode from namespace (or mesh) settings, and disables
mTLS for workload port 8080
.
apiVersion: security.istio.io/v1
kind: PeerAuthentication
metadata:
name: default
namespace: foo
spec:
selector:
matchLabels:
app: finance
mtls:
mode: UNSET
portLevelMtls:
8080:
mode: DISABLE
PeerAuthentication
PeerAuthentication.MutualTLS
Mutual TLS settings.
PeerAuthentication.MutualTLS.Mode
Name | Description |
---|---|
UNSET | Inherit from parent, if has one. Otherwise treated as |
DISABLE | Connection is not tunneled. |
PERMISSIVE | Connection can be either plaintext or mTLS tunnel. |
STRICT | Connection is an mTLS tunnel (TLS with client cert must be presented). |