# Annotations in Kubernetes mode

This page provide a complete list of all the annotations you can specify when you run Kuma in Kubernetes mode.

# kuma.io/mesh

Associates a given Pod with a particular Mesh. Annotation value must be the name of a Mesh resource.

Example

apiVersion: v1
kind: Pod
metadata:
 name: backend
 annotations:
   kuma.io/mesh: default
[...]
1
2
3
4
5
6
7

# kuma.io/sidecar-injection

Lets you enable or disable sidecar injection.

Example

apiVersion: v1
kind: Namespace
metadata:
 name: default
 annotations:
   kuma.io/sidecar-injection: enabled
[...]
1
2
3
4
5
6
7

# kuma.io/gateway

Lets you specify the Pod should run in gateway mode. Inbound listeners are not generated.

Example

apiVersion: apps/v1
kind: Deployment
metadata:
  name: gateway
spec:
  selector:
    matchLabels:
      app: gateway
  template:
    metadata:
      labels:
        app: gateway
      annotations:
        kuma.io/gateway: enabled
[...]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

# kuma.io/ingress

Marks the Pod as the Zone Ingress. Needed for multizone communication -- provides the entry point for traffic from other zones.

Example

apiVersion: v1
kind: Pod
metadata:
 name: zone-ingress
 annotations:
   kuma.io/ingress: enabled
[...]
1
2
3
4
5
6
7

# kuma.io/ingress-public-address

Specifies the public address for Ingress. If not provided, Kuma picks the address from the Ingress Service.

Example

apiVersion: v1
kind: Pod
metadata:
 name: zone-ingress
 annotations:
   kuma.io/ingress: enabled
   kuma.io/ingress-public-address: custom-address.com
[...]
1
2
3
4
5
6
7
8

# kuma.io/ingress-public-port

Specifies the public port for Ingress. If not provided, Kuma picks the port from the Ingress Service.

Example

apiVersion: v1
kind: Pod
metadata:
 name: zone-ingress
 annotations:
   kuma.io/ingress: enabled
   kuma.io/ingress-public-port: "1234"
[...]
1
2
3
4
5
6
7
8

# kuma.io/direct-access-services

Defines a comma-separated list of Services that can be accessed directly.

Example

apiVersion: v1
kind: Pod
metadata:
  name: example
  annotations:
    kuma.io/direct-access-services: test-app_playground_svc_80,test-app_playground_svc_443
    kuma.io/transparent-proxying: enabled
    kuma.io/transparent-proxying-inbound-port: [...]
    kuma.io/transparent-proxying-outbound-port: [...]
1
2
3
4
5
6
7
8
9

When you provide this annotation, Kuma generates a listener for each IP address and redirects traffic through a direct-access cluster that's configured to encrypt connections.

These listeners are needed because transparent proxy and mTLS assume a single IP per cluster (for example, the ClusterIP of a Kubernetes Service). If you pass requests to direct IP addresses, Envoy considers them unknown destinations and manages them in passthrough mode -- which means they're not encrypted with mTLS. The direct-access cluster enables encryption anyway.

WARNING: You should specify this annotation only if you really need it. Generating listeners for every endpoint makes the xDS snapshot very large.

# kuma.io/virtual-probes

Enables automatic converting of HttpGet probes to virtual probes. The virtual probe is served on a sub-path of the insecure port specified with kuma.io/virtual-probes-port -- for example, :8080/health/readiness -> :9000/8080/health/readiness, where 9000 is the value of the kuma.io/virtual-probes-port annotation.

Example

apiVersion: v1
kind: Pod
metadata:
  name: example
  annotations:
    kuma.io/virtual-probes: enabled
    kuma.io/virtual-probes-port: "9000"
[...]
1
2
3
4
5
6
7
8

# kuma.io/virtual-probes-port

Specifies the insecure port for listening on virtual probes.

# kuma.io/sidecar-env-vars

Semicolon (;) separated list of environment variables for the Kuma sidecar.

Example

apiVersion: v1
kind: Pod
metadata:
  name: example
  annotations:
    kuma.io/sidecar-env-vars: TEST1=1;TEST2=2 
1
2
3
4
5
6

# prometheus.metrics.kuma.io/port

Lets you override the Mesh-wide default port that Prometheus should scrape metrics from.

Example

apiVersion: v1
kind: Pod
metadata:
  name: example
  annotations:
    prometheus.metrics.kuma.io/port: "1234"
1
2
3
4
5
6

# prometheus.metrics.kuma.io/path

Lets you override the Mesh-wide default path that Prometheus should scrape metrics from.

Example

apiVersion: v1
kind: Pod
metadata:
  name: example
  annotations:
    prometheus.metrics.kuma.io/path: "/custom-metrics"
1
2
3
4
5
6

# kuma.io/builtindns

Tells the sidecar to use its builtin DNS server.

Example

apiVersion: v1
kind: Pod
metadata:
  name: example
  annotations:
    kuma.io/builtindns: enabled
1
2
3
4
5
6

# kuma.io/builtindnsport

Port the builtin DNS server should listen on for DNS queries.

Example

apiVersion: v1
kind: Pod
metadata:
  name: example
  annotations:
    kuma.io/builtindns: enabled
    kuma.io/builtindnsport: "15053"
1
2
3
4
5
6
7

# traffic.kuma.io/exclude-inbound-ports

List of inbound ports to exclude from traffic interception by the Kuma sidecar.

Example

apiVersion: v1
kind: Pod
metadata:
  name: example
  annotations:
    traffic.kuma.io/exclude-inbound-ports: "1234,1235"
1
2
3
4
5
6

# traffic.kuma.io/exclude-outbound-ports

List of outbound ports to exclude from traffic interception by the Kuma sidecar.

Example

apiVersion: v1
kind: Pod
metadata:
  name: example
  annotations:
    traffic.kuma.io/exclude-outbound-ports: "1234,1235"
1
2
3
4
5
6
Last Updated: 7/13/2021, 8:06:28 PM