Add Envoy sidecar for consistent hashing algorithm #108
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Add Envoy sidecar
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| {{- if .Values.envoySidecar.enabled -}} | ||
| {{- $fullName := include "document-engine.fullname" . -}} | ||
| apiVersion: v1 | ||
| kind: ConfigMap | ||
| metadata: | ||
| name: {{ $fullName }}-envoy-sidecar | ||
| labels: | ||
| {{- include "document-engine.labels" . | nindent 4 }} | ||
| data: | ||
| envoy.yaml: | | ||
| admin: | ||
| address: | ||
| socket_address: | ||
| address: 0.0.0.0 | ||
| port_value: {{ .Values.envoySidecar.adminPort }} | ||
|
|
||
| static_resources: | ||
| listeners: | ||
| - name: listener_0 | ||
| address: | ||
| socket_address: | ||
| address: 0.0.0.0 | ||
| port_value: {{ .Values.envoySidecar.port }} | ||
| filter_chains: | ||
| - filters: | ||
| - name: envoy.filters.network.http_connection_manager | ||
| typed_config: | ||
| "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager | ||
| stat_prefix: ingress_http | ||
| access_log: | ||
| - name: envoy.access_loggers.stdout | ||
| typed_config: | ||
| "@type": type.googleapis.com/envoy.extensions.access_loggers.stream.v3.StdoutAccessLog | ||
| route_config: | ||
| name: local_route | ||
| virtual_hosts: | ||
| - name: backend | ||
| domains: ["*"] | ||
| response_headers_to_add: | ||
| - header: | ||
| key: "x-hash-by" | ||
| value: "%REQ(X-Hash-By)%" | ||
| - header: | ||
| key: "x-envoy-upstream-remote-address" | ||
| value: "%UPSTREAM_REMOTE_ADDRESS%" | ||
| routes: | ||
| - match: | ||
| prefix: "/" | ||
| route: | ||
| cluster: document_engine_cluster | ||
| hash_policy: | ||
| - header: | ||
| header_name: "X-Hash-By" | ||
| http_filters: | ||
| # Extract document ID from URI and set as header | ||
| - name: envoy.filters.http.lua | ||
| typed_config: | ||
| "@type": type.googleapis.com/envoy.extensions.filters.http.lua.v3.Lua | ||
| inline_code: | | ||
| function envoy_on_request(request_handle) | ||
| local path = request_handle:headers():get(":path") | ||
| local document_id = nil | ||
|
|
||
| -- Try different URI patterns | ||
| document_id = string.match(path, "^/api/documents/([a-zA-Z0-9._~-]+)") | ||
| if not document_id then | ||
| document_id = string.match(path, "^/i/d/([a-zA-Z0-9._~-]+)") | ||
| end | ||
| if not document_id then | ||
| document_id = string.match(path, "^/documents/([a-zA-Z0-9._~-]+)") | ||
| end | ||
| if not document_id then | ||
| document_id = string.match(path, "^/dashboard/api/document/([a-zA-Z0-9._~-]+)") | ||
| end | ||
|
|
||
| -- Only set header if document_id found, otherwise use round-robin | ||
| if document_id then | ||
| request_handle:headers():add("X-Hash-By", document_id) | ||
| end | ||
| end | ||
| - name: envoy.filters.http.router | ||
| typed_config: | ||
| "@type": type.googleapis.com/envoy.extensions.filters.http.router.v3.Router | ||
|
|
||
| clusters: | ||
| - name: document_engine_cluster | ||
| connect_timeout: 5s | ||
| type: STRICT_DNS | ||
| dns_lookup_family: V4_ONLY | ||
| lb_policy: RING_HASH | ||
| ring_hash_lb_config: | ||
| minimum_ring_size: 1024 | ||
| load_assignment: | ||
| cluster_name: document_engine_cluster | ||
| endpoints: | ||
| - lb_endpoints: | ||
| - endpoint: | ||
| address: | ||
| socket_address: | ||
| address: {{ $fullName }}-headless.{{ .Release.Namespace }}.svc.cluster.local | ||
| port_value: {{ .Values.service.port }} | ||
| health_checks: | ||
| - timeout: 1s | ||
| interval: 10s | ||
| unhealthy_threshold: 2 | ||
| healthy_threshold: 2 | ||
| http_health_check: | ||
| path: /health | ||
| {{- end }} | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| {{- if .Values.envoySidecar.enabled -}} | ||
| apiVersion: v1 | ||
| kind: Service | ||
| metadata: | ||
| name: {{ include "document-engine.fullname" . }}-headless | ||
| labels: | ||
| {{- include "document-engine.labels" . | nindent 4 }} | ||
| spec: | ||
| clusterIP: None | ||
| selector: | ||
| {{- include "document-engine.selectorLabels" . | nindent 4 }} | ||
| ports: | ||
| - port: {{ .Values.service.port }} | ||
| targetPort: api | ||
| protocol: TCP | ||
| name: api | ||
| {{- end }} |
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