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64 lines
2.7 KiB
YAML
64 lines
2.7 KiB
YAML
# Exhaustive EndpointSlice reference (discovery.k8s.io/v1).
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# EndpointSlices are the address lists behind a Service: each entry says
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# "IP X serves port Y, ready or not". Normally the endpoint controller writes
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# them automatically from the Service selector. You write one by hand in a
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# single case: a selector-less Service pointing OUTSIDE the cluster (a host
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# daemon, a LAN appliance, an external database). The pair looks like:
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# Service (no selector, same port names) + this EndpointSlice.
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apiVersion: discovery.k8s.io/v1
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kind: EndpointSlice
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metadata:
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name: app-external-abc123
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namespace: example
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labels:
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# kubernetes.io/service-name: THE binding label. It must equal the
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# selector-less Service name - this is what attaches the slice to it.
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# The endpoint controller owns slices it creates; hand-written ones
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# just need this label to be picked up.
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kubernetes.io/service-name: app-external-service
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app: app
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annotations:
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description: "hand-written slice for an off-cluster backend"
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# addressType: IPv4, IPv6, or FQDN. All endpoints in one slice share it -
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# mix families with one slice per family.
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addressType: IPv4
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ports:
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- name: http
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# name: MUST match the Service port name it serves.
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protocol: TCP
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# port: the REAL backend port (may differ from the Service port - the
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# Service port is the in-cluster alias, this is where packets go).
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port: 8080
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# appProtocol: payload hint, mirrors the Service field.
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appProtocol: http
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endpoints:
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# One entry per backend address. kube-proxy load-balances across the ones
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# whose conditions say ready+serving+terminating=false.
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- addresses:
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# addresses: one or more IPs (or a single DNS name for FQDN slices).
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- 192.168.1.50
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conditions:
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# ready: backend accepts traffic. False removes it from rotation
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# without deleting the entry (flap-friendly).
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ready: true
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# serving: the process is up. Differs from ready during shutdown:
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# serving=false + terminating=true = draining.
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serving: true
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# terminating: the endpoint is going away. Draining traffic, not dead.
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terminating: false
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# hostname: DNS name published for this endpoint (headless Services).
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# hostname: backend-1
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# targetRef: link back to the pod/node object (set automatically on
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# controller-managed slices; omit on hand-written ones).
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# targetRef:
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# kind: Pod
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# namespace: example
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# name: app-67890abcde-fghij
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# uid: 12345678-1234-1234-1234-123456789abc
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# nodeName: the node hosting this endpoint (topology-aware routing).
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# zone: override the endpoint zone (defaults from nodeName).
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# hints: topology hints for zone-aware routing (PreferClose).
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# hints:
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# forZones:
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# - name: zone-a
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