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a01fecf679
It's a tiny bit easier to run through the YAML when it starts with the ServiceAccount, I find.
90 lines
1.9 KiB
YAML
90 lines
1.9 KiB
YAML
# Better Consul cluster.
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# There is still no actual persistence, but:
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# - podAntiaffinity prevents pod colocation
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# - clusters works when scaling down to 1 (thanks to lifecycle hook)
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---
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: consul
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: Role
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metadata:
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name: consul
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rules:
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- apiGroups: [""]
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resources:
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- pods
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verbs:
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- get
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- list
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: RoleBinding
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metadata:
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name: consul
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: Role
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name: consul
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subjects:
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- kind: ServiceAccount
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name: consul
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: consul
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spec:
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ports:
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- port: 8500
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name: http
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selector:
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app: consul
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---
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apiVersion: apps/v1
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kind: StatefulSet
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metadata:
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name: consul
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spec:
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serviceName: consul
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replicas: 3
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selector:
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matchLabels:
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app: consul
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template:
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metadata:
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labels:
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app: consul
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spec:
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serviceAccountName: consul
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affinity:
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podAntiAffinity:
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requiredDuringSchedulingIgnoredDuringExecution:
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- labelSelector:
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matchLabels:
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app: consul
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topologyKey: kubernetes.io/hostname
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terminationGracePeriodSeconds: 10
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containers:
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- name: consul
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image: "consul:1.11"
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env:
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- name: NAMESPACE
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valueFrom:
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fieldRef:
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fieldPath: metadata.namespace
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args:
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- "agent"
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- "-bootstrap-expect=3"
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- "-retry-join=provider=k8s label_selector=\"app=consul\" namespace=\"$(NAMESPACE)\""
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- "-client=0.0.0.0"
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- "-data-dir=/consul/data"
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- "-server"
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- "-ui"
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lifecycle:
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preStop:
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exec:
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command: [ "sh", "-c", "consul leave" ]
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