10-zones-02-advanced-02-aws-pod-per-host.yaml

#
# AWS-specific labels, applicable in 'nodeAffinity' statements
#
# beta.kubernetes.io/arch=amd64
# beta.kubernetes.io/instance-type=t2.medium
# beta.kubernetes.io/os=linux
#
# failure-domain.beta.kubernetes.io/region=us-east-1
# failure-domain.beta.kubernetes.io/zone=us-east-1a
#
# kubernetes.io/hostname=ip-172-20-37-97.ec2.internal
# kubernetes.io/role=node
# node-role.kubernetes.io/node=
#
# kops.k8s.io/instancegroup=nodes2
#
apiVersion: "clickhouse.altinity.com/v1"
kind: "ClickHouseInstallation"
metadata:
  name: "zones-pod-host"
spec:
  defaults:
    templates:
      podTemplate: clickhouse-per-host-in-zone-us-east-1a
  configuration:
    clusters:
      - name: zoned-cluster
        layout:
          shardsCount: 3

  templates:
    podTemplates:
      # Specify Pod Templates with affinity
      - name: clickhouse-per-host-in-zone-us-east-1a
        spec:
          affinity:
            # Specify Pod affinity to nodes in specified availability zone
            nodeAffinity:
              requiredDuringSchedulingIgnoredDuringExecution:
                nodeSelectorTerms:
                  - matchExpressions:
                      - key: "failure-domain.beta.kubernetes.io/zone"
                        operator: In
                        values:
                          - "us-east-1a"
            # Specify Pod anti-affinity to Pods with the same label "/app" on the same "hostname"
            podAntiAffinity:
              requiredDuringSchedulingIgnoredDuringExecution:
                - labelSelector:
                    matchExpressions:
                      - key: "clickhouse.altinity.com/app"
                        operator: In
                        values:
                          - "chop"
                  topologyKey: "kubernetes.io/hostname"
          containers:
            - name: clickhouse-pod
              image: yandex/clickhouse-server:19.3.7