Customize EnvoyProxy
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Envoy Gateway provides an EnvoyProxy CRD that can be linked to the ParametersRef in GatewayClass, allowing cluster admins to customize the managed EnvoyProxy Deployment and Service. To learn more about GatewayClass and ParametersRef, please refer to Gateway API documentation.
Installation
Follow the steps from the Quickstart Guide to install Envoy Gateway and the example manifest. Before proceeding, you should be able to query the example backend using HTTP.
Add GatewayClass ParametersRef
First, you need to add ParametersRef in GatewayClass, and refer to EnvoyProxy Config:
cat <<EOF | kubectl apply -f -
apiVersion: gateway.networking.k8s.io/v1
kind: GatewayClass
metadata:
name: eg
spec:
controllerName: gateway.envoyproxy.io/gatewayclass-controller
parametersRef:
group: gateway.envoyproxy.io
kind: EnvoyProxy
name: custom-proxy-config
namespace: envoy-gateway-system
EOF
Customize EnvoyProxy Deployment Replicas
You can customize the EnvoyProxy Deployment Replicas via EnvoyProxy Config like:
cat <<EOF | kubectl apply -f -
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyProxy
metadata:
name: custom-proxy-config
namespace: envoy-gateway-system
spec:
provider:
type: Kubernetes
kubernetes:
envoyDeployment:
replicas: 2
EOF
After you apply the config, you should see the replicas of envoyproxy changes to 2. And also you can dynamically change the value.
kubectl get deployment -l gateway.envoyproxy.io/owning-gateway-name=eg
Customize EnvoyProxy Image
You can customize the EnvoyProxy Image via EnvoyProxy Config like:
cat <<EOF | kubectl apply -f -
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyProxy
metadata:
name: custom-proxy-config
namespace: envoy-gateway-system
spec:
provider:
type: Kubernetes
kubernetes:
envoyDeployment:
container:
image: envoyproxy/envoy:v1.25-v0.6.0
EOF
After applying the config, you can get the deployment image, and see it has changed.
Customize EnvoyProxy Pod Annotations
You can customize the EnvoyProxy Pod Annotations via EnvoyProxy Config like:
cat <<EOF | kubectl apply -f -
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyProxy
metadata:
name: custom-proxy-config
namespace: envoy-gateway-system
spec:
provider:
type: Kubernetes
kubernetes:
envoyDeployment:
pod:
annotations:
custom1: deploy-annotation1
custom2: deploy-annotation2
EOF
After applying the config, you can get the envoyproxy pods, and see new annotations has been added.
Customize EnvoyProxy Deployment Resources
You can customize the EnvoyProxy Deployment Resources via EnvoyProxy Config like:
cat <<EOF | kubectl apply -f -
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyProxy
metadata:
name: custom-proxy-config
namespace: envoy-gateway-system
spec:
provider:
type: Kubernetes
kubernetes:
envoyDeployment:
container:
resources:
requests:
cpu: 150m
memory: 640Mi
limits:
cpu: 500m
memory: 1Gi
EOF
Customize EnvoyProxy Deployment Env
You can customize the EnvoyProxy Deployment Env via EnvoyProxy Config like:
cat <<EOF | kubectl apply -f -
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyProxy
metadata:
name: custom-proxy-config
namespace: envoy-gateway-system
spec:
provider:
type: Kubernetes
kubernetes:
envoyDeployment:
container:
env:
- name: env_a
value: env_a_value
- name: env_b
value: env_b_value
EOF
Envoy Gateway has provided two initial
envENVOY_GATEWAY_NAMESPACEandENVOY_POD_NAMEfor envoyproxy container.
After applying the config, you can get the envoyproxy deployment, and see resources has been changed.
Customize EnvoyProxy Deployment Volumes or VolumeMounts
You can customize the EnvoyProxy Deployment Volumes or VolumeMounts via EnvoyProxy Config like:
cat <<EOF | kubectl apply -f -
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyProxy
metadata:
name: custom-proxy-config
namespace: envoy-gateway-system
spec:
provider:
type: Kubernetes
kubernetes:
envoyDeployment:
container:
volumeMounts:
- mountPath: /certs
name: certs
readOnly: true
pod:
volumes:
- name: certs
secret:
secretName: envoy-cert
EOF
After applying the config, you can get the envoyproxy deployment, and see resources has been changed.
Customize EnvoyProxy Service Annotations
You can customize the EnvoyProxy Service Annotations via EnvoyProxy Config like:
cat <<EOF | kubectl apply -f -
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyProxy
metadata:
name: custom-proxy-config
namespace: envoy-gateway-system
spec:
provider:
type: Kubernetes
kubernetes:
envoyService:
annotations:
custom1: svc-annotation1
custom2: svc-annotation2
EOF
After applying the config, you can get the envoyproxy service, and see annotations has been added.
Customize EnvoyProxy Bootstrap Config
You can customize the EnvoyProxy bootstrap config via EnvoyProxy Config. There are two ways to customize it:
- Replace: the whole bootstrap config will be replaced by the config you provided.
- Merge: the config you provided will be merged into the default bootstrap config.
cat <<EOF | kubectl apply -f -
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyProxy
metadata:
name: custom-proxy-config
namespace: envoy-gateway-system
spec:
bootstrap:
type: Replace
value: |
admin:
access_log:
- name: envoy.access_loggers.file
typed_config:
"@type": type.googleapis.com/envoy.extensions.access_loggers.file.v3.FileAccessLog
path: /dev/null
address:
socket_address:
address: 127.0.0.1
port_value: 20000
dynamic_resources:
ads_config:
api_type: DELTA_GRPC
transport_api_version: V3
grpc_services:
- envoy_grpc:
cluster_name: xds_cluster
set_node_on_first_message_only: true
lds_config:
ads: {}
resource_api_version: V3
cds_config:
ads: {}
resource_api_version: V3
static_resources:
clusters:
- connect_timeout: 10s
load_assignment:
cluster_name: xds_cluster
endpoints:
- lb_endpoints:
- endpoint:
address:
socket_address:
address: envoy-gateway
port_value: 18000
typed_extension_protocol_options:
"envoy.extensions.upstreams.http.v3.HttpProtocolOptions":
"@type": "type.googleapis.com/envoy.extensions.upstreams.http.v3.HttpProtocolOptions"
"explicit_http_config":
"http2_protocol_options": {}
name: xds_cluster
type: STRICT_DNS
transport_socket:
name: envoy.transport_sockets.tls
typed_config:
"@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.UpstreamTlsContext
common_tls_context:
tls_params:
tls_maximum_protocol_version: TLSv1_3
tls_certificate_sds_secret_configs:
- name: xds_certificate
sds_config:
path_config_source:
path: "/sds/xds-certificate.json"
resource_api_version: V3
validation_context_sds_secret_config:
name: xds_trusted_ca
sds_config:
path_config_source:
path: "/sds/xds-trusted-ca.json"
resource_api_version: V3
layered_runtime:
layers:
- name: runtime-0
rtds_layer:
rtds_config:
ads: {}
resource_api_version: V3
name: runtime-0
EOF
You can use egctl translate to get the default xDS Bootstrap configuration used by Envoy Gateway.
After applying the config, the bootstrap config will be overridden by the new config you provided.
Any errors in the configuration will be surfaced as status within the GatewayClass resource.
You can also validate this configuration using egctl translate.
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