kubernetes/common/etcd/templates/statefulset.yaml

   1 {{/*
   2 # Copyright © 2019 Intel Corporation Inc
   3 #
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at
   7 #
   8 #       http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15 */}}
  16 apiVersion: apps/v1
  17 kind: StatefulSet
  18 metadata:
  19   name: {{ include "common.fullname" .  }}
  20   labels:
  21     heritage: "{{ .Release.Service }}"
  22     release: "{{ include "common.release" . }}"
  23     chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
  24     app: {{ include "common.name" . }}
  25 spec:
  26   serviceName: {{ include "common.servicename" .}}
  27   replicas: {{ .Values.replicaCount }}
  28   selector:
  29     matchLabels:
  30       app: {{ include "common.name" .  }}
  31   template:
  32     metadata:
  33       labels:
  34         heritage: "{{ .Release.Service }}"
  35         release: "{{ include "common.release" . }}"
  36         chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
  37         app: {{ include "common.name" . }}
  38     spec:
  39 {{- if .Values.affinity }}
  40       affinity:
  41 {{ toYaml .Values.affinity | indent 8 }}
  42 {{- end }}
  43 {{- if .Values.nodeSelector }}
  44       nodeSelector:
  45 {{ toYaml .Values.nodeSelector | indent 8 }}
  46 {{- end }}
  47 {{- if .Values.tolerations }}
  48       tolerations:
  49 {{ toYaml .Values.tolerations | indent 8 }}
  50 {{- end }}
  51       containers:
  52       - name: {{ include "common.name" .  }}
  53         image: {{ include "repositoryGenerator.googleK8sRepository" . }}/{{ .Values.image }}
  54         imagePullPolicy: "{{ .Values.pullPolicy }}"
  55         ports:
  56         - containerPort: {{ .Values.service.peerInternalPort }}
  57           name: {{ .Values.service.peerPortName }}
  58         - containerPort: {{ .Values.service.clientInternalPort }}
  59           name: {{ .Values.service.clientPortName }}
  60         {{- if eq .Values.liveness.enabled true }}
  61         livenessProbe:
  62           tcpSocket:
  63             port: {{ .Values.service.clientInternalPort }}
  64           initialDelaySeconds: {{ .Values.liveness.initialDelaySeconds }}
  65           periodSeconds: {{ .Values.liveness.periodSeconds }}
  66           timeoutSeconds: {{ .Values.liveness.timeoutSeconds }}
  67         {{ end -}}
  68         resources:
  69 {{ include "common.resources" . | indent 10 }}
  70         env:
  71         - name: INITIAL_CLUSTER_SIZE
  72           value: {{ .Values.replicaCount | quote }}
  73         - name: SET_NAME
  74           value: {{ include "common.fullname" . }}
  75         - name: SERVICE_NAME
  76           value: {{ include "common.servicename" . }}
  77 {{- if .Values.extraEnv }}
  78 {{ toYaml .Values.extraEnv | indent 8 }}
  79 {{- end }}
  80         lifecycle:
  81           preStop:
  82             exec:
  83               command:
  84                 - "/bin/sh"
  85                 - "-ec"
  86                 - |
  87                   EPS=""
  88                   for i in $(seq 0 $((${INITIAL_CLUSTER_SIZE} - 1))); do
  89                       EPS="${EPS}${EPS:+,}http://${SET_NAME}-${i}.${SERVICE_NAME}:2379"
  90                   done
  91
  92                   HOSTNAME=$(hostname)
  93
  94                   member_hash() {
  95                       etcdctl member list | grep http://${HOSTNAME}.${SERVICE_NAME}:2380 | cut -d':' -f1 | cut -d'[' -f1
  96                   }
  97
  98                   SET_ID=${HOSTNAME##*[^0-9]}
  99
 100                   if [ "${SET_ID}" -ge ${INITIAL_CLUSTER_SIZE} ]; then
 101                       echo "Removing ${HOSTNAME} from etcd cluster"
 102                       ETCDCTL_ENDPOINT=${EPS} etcdctl member remove $(member_hash)
 103                       if [ $? -eq 0 ]; then
 104                           # Remove everything otherwise the cluster will no longer scale-up
 105                           rm -rf /var/run/etcd/*
 106                       fi
 107                   fi
 108         command:
 109           - "/bin/sh"
 110           - "-ec"
 111           - |
 112             HOSTNAME=$(hostname)
 113
 114             # store member id into PVC for later member replacement
 115             collect_member() {
 116                 while ! etcdctl member list &>/dev/null; do sleep 1; done
 117                 etcdctl member list | grep http://${HOSTNAME}.${SERVICE_NAME}:2380 | cut -d':' -f1 | cut -d'[' -f1 > /var/run/etcd/member_id
 118                 exit 0
 119             }
 120
 121             eps() {
 122                 EPS=""
 123                 for i in $(seq 0 $((${INITIAL_CLUSTER_SIZE} - 1))); do
 124                     EPS="${EPS}${EPS:+,}http://${SET_NAME}-${i}.${SERVICE_NAME}:2379"
 125                 done
 126                 echo ${EPS}
 127             }
 128
 129             member_hash() {
 130                 etcdctl member list | grep http://${HOSTNAME}.${SERVICE_NAME}:2380 | cut -d':' -f1 | cut -d'[' -f1
 131             }
 132
 133             # we should wait for other pods to be up before trying to join
 134             # otherwise we got "no such host" errors when trying to resolve other members
 135             for i in $(seq 0 $((${INITIAL_CLUSTER_SIZE} - 1))); do
 136                 if [ "${SET_NAME}-${i}" == "${HOSTNAME}" ]; then
 137                     echo "Skipping self-checking"
 138                     continue
 139                 fi
 140                 while true; do
 141                     echo "Waiting for ${SET_NAME}-${i}.${SERVICE_NAME} to come up"
 142                     ping -W 1 -c 1 ${SET_NAME}-${i}.${SERVICE_NAME} > /dev/null && break
 143                     sleep 1s
 144                 done
 145             done
 146
 147             # re-joining after failure?
 148             if [[ -e /var/run/etcd/default.etcd && -f /var/run/etcd/member_id ]]; then
 149                 echo "Re-joining etcd member"
 150                 member_id=$(cat /var/run/etcd/member_id)
 151
 152                 # re-join member
 153                 ETCDCTL_ENDPOINT=$(eps) etcdctl member update ${member_id} http://${HOSTNAME}.${SERVICE_NAME}:2380 | true
 154                 exec etcd --name ${HOSTNAME} \
 155                     --listen-peer-urls http://0.0.0.0:2380 \
 156                     --listen-client-urls http://0.0.0.0:2379\
 157                     --advertise-client-urls http://${HOSTNAME}.${SERVICE_NAME}:2379 \
 158                     --data-dir /var/run/etcd/default.etcd
 159             fi
 160
 161             # etcd-SET_ID
 162             SET_ID=${HOSTNAME##*[^0-9]}
 163
 164             # adding a new member to existing cluster (assuming all initial pods are available)
 165             if [ "${SET_ID}" -ge ${INITIAL_CLUSTER_SIZE} ]; then
 166                 export ETCDCTL_ENDPOINT=$(eps)
 167
 168                 # member already added?
 169                 MEMBER_HASH=$(member_hash)
 170                 if [ -n "${MEMBER_HASH}" ]; then
 171                     # the member hash exists but for some reason etcd failed
 172                     # as the datadir has not be created, we can remove the member
 173                     # and retrieve new hash
 174                     etcdctl member remove ${MEMBER_HASH}
 175                 fi
 176
 177                 echo "Adding new member"
 178                 etcdctl member add ${HOSTNAME} http://${HOSTNAME}.${SERVICE_NAME}:2380 | grep "^ETCD_" > /var/run/etcd/new_member_envs
 179
 180                 if [ $? -ne 0 ]; then
 181                     echo "Exiting"
 182                     rm -f /var/run/etcd/new_member_envs
 183                     exit 1
 184                 fi
 185
 186                 cat /var/run/etcd/new_member_envs
 187                 . /var/run/etcd/new_member_envs
 188
 189                 collect_member &
 190
 191                 exec etcd --name ${HOSTNAME} \
 192                     --listen-peer-urls http://0.0.0.0:2380 \
 193                     --listen-client-urls http://0.0.0.0:2379 \
 194                     --advertise-client-urls http://${HOSTNAME}.${SERVICE_NAME}:2379 \
 195                     --data-dir /var/run/etcd/default.etcd \
 196                     --initial-advertise-peer-urls http://${HOSTNAME}.${SERVICE_NAME}:2380 \
 197                     --initial-cluster ${ETCD_INITIAL_CLUSTER} \
 198                     --initial-cluster-state ${ETCD_INITIAL_CLUSTER_STATE}
 199             fi
 200
 201             PEERS=""
 202             for i in $(seq 0 $((${INITIAL_CLUSTER_SIZE} - 1))); do
 203                 PEERS="${PEERS}${PEERS:+,}${SET_NAME}-${i}=http://${SET_NAME}-${i}.${SERVICE_NAME}:2380"
 204             done
 205
 206             collect_member &
 207
 208             # join member
 209             exec etcd --name ${HOSTNAME} \
 210                 --initial-advertise-peer-urls http://${HOSTNAME}.${SERVICE_NAME}:2380 \
 211                 --listen-peer-urls http://0.0.0.0:2380 \
 212                 --listen-client-urls http://0.0.0.0:2379 \
 213                 --advertise-client-urls http://${HOSTNAME}.${SERVICE_NAME}:2379 \
 214                 --initial-cluster-token etcd-cluster-1 \
 215                 --initial-cluster ${PEERS} \
 216                 --initial-cluster-state new \
 217                 --data-dir /var/run/etcd/default.etcd
 218         volumeMounts:
 219         - name: {{ include "common.fullname" . }}-data
 220           mountPath: /var/run/etcd
 221   {{- if .Values.persistence.enabled }}
 222   volumeClaimTemplates:
 223   - metadata:
 224       name: {{ include "common.fullname" . }}-data
 225       labels:
 226         name: {{ include "common.fullname" . }}
 227         chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
 228         release: "{{ include "common.release" . }}"
 229         heritage: "{{ .Release.Service }}"
 230     spec:
 231       accessModes:
 232       - "{{ .Values.persistence.accessMode }}"
 233       storageClassName: {{ include "common.storageClass" . }}
 234       resources:
 235         requests:
 236           # upstream recommended max is 700M
 237           storage: "{{ .Values.persistence.storage }}"
 238   {{- else }}
 239       volumes:
 240       - name: {{ include "common.fullname" . }}-data
 241       {{- if .Values.memoryMode }}
 242         emptyDir:
 243           medium: Memory
 244       {{- else }}
 245         emptyDir: {}
 246       {{- end }}
 247   {{- end }}