11-local-storage-02-advanced-host-path.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: "volume-hostpath"
spec:
  defaults:
    templates:
      podTemplate: clickhouse-per-host-on-servers-with-ssd
  configuration:
    clusters:
      - name: local-storage
        layout:
          shardsCount: 3

  templates:
    podTemplates:
      # Specify Pod Templates with affinity

      - name: clickhouse-per-host-on-servers-with-ssd
        spec:
          affinity:
            # Specify Pod affinity to nodes with specified properties (disktype=ssd)
            nodeAffinity:
              requiredDuringSchedulingIgnoredDuringExecution:
                nodeSelectorTerms:
                  - matchExpressions:
                      - key: "disktype"
                        operator: In
                        values:
                          - "ssd"
            # 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"
          volumes:
            # Specify volume as path on local filesystem as a directory which will be created, if need be
            - name: local-path
              hostPath:
                path: /mnt/podvolume
                type: DirectoryOrCreate
          containers:
            - name: clickhouse-pod
              image: yandex/clickhouse-server:19.3.7
              volumeMounts:
                # Specify reference to volume on local filesystem
                - name: local-path
                  mountPath: /var/lib/clickhouse