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refactor services
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kimxogus committed May 3, 2019
1 parent 09d4e6b commit 8fcbca9
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3 changes: 3 additions & 0 deletions elasticsearch/README.md
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Expand Up @@ -88,6 +88,9 @@ helm install --name elasticsearch elastic/elasticsearch --version 7.0.1-alpha1 -
| `protocol` | The protocol that will be used for the readinessProbe. Change this to `https` if you have `xpack.security.http.ssl.enabled` set | `http` |
| `httpPort` | The http port that Kubernetes will use for the healthchecks and the service. If you change this you will also need to set [http.port](https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-http.html#_settings) in `extraEnvs` | `9200` |
| `transportPort` | The transport port that Kubernetes will use for the service. If you change this you will also need to set [transport port configuration](https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-transport.html#_transport_settings) in `extraEnvs` | `9300` |
| `service.type` | Type of elasticsearch service. [Service Types](https://kubernetes.io/docs/concepts/services-networking/service/#publishing-services-service-types) | `ClusterIP` |
| `service.annotations` | Annotations that Kubernetes will use for the service. This will configure load balancer if `service.type` is `LoadBalancer` (https://kubernetes.io/docs/concepts/services-networking/service/#ssl-support-on-aws) | `{}` |

| `updateStrategy` | The [updateStrategy](https://kubernetes.io/docs/tutorials/stateful-application/basic-stateful-set/#updating-statefulsets) for the statefulset. By default Kubernetes will wait for the cluster to be green after upgrading each pod. Setting this to `OnDelete` will allow you to manually delete each pod during upgrades | `RollingUpdate` |
| `maxUnavailable` | The [maxUnavailable](https://kubernetes.io/docs/tasks/run-application/configure-pdb/#specifying-a-poddisruptionbudget) value for the pod disruption budget. By default this will prevent Kubernetes from having more than 1 unhealthy pod in the node group | `1` |
| `fsGroup` | The Group ID (GID) for [securityContext.fsGroup](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/) so that the Elasticsearch user can read from the persistent volume | `1000` |
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13 changes: 10 additions & 3 deletions elasticsearch/templates/service.yaml
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Expand Up @@ -3,7 +3,15 @@ kind: Service
apiVersion: v1
metadata:
name: {{ template "uname" . }}
labels:
heritage: {{ .Release.Service | quote }}
release: {{ .Release.Name | quote }}
chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
app: "{{ template "uname" . }}"
annotations:
{{ toYaml .Values.service.annotations | indent 4 }}
spec:
type: {{ .Values.service.type }}
selector:
heritage: {{ .Release.Service | quote }}
release: {{ .Release.Name | quote }}
Expand All @@ -26,11 +34,10 @@ metadata:
release: {{ .Release.Name | quote }}
chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
app: "{{ template "uname" . }}"
annotations:
# Create endpoints also if the related pod isn't ready
service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
spec:
clusterIP: None # This is needed for statefulset hostnames like elasticsearch-0 to resolve
# Create endpoints also if the related pod isn't ready
publishNotReadyAddresses: true
selector:
app: "{{ template "uname" . }}"
ports:
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4 changes: 4 additions & 0 deletions elasticsearch/values.yaml
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Expand Up @@ -113,6 +113,10 @@ protocol: http
httpPort: 9200
transportPort: 9300

service:
annotations: {}
type: ClusterIP

updateStrategy: RollingUpdate

# This is the max unavailable setting for the pod disruption budget
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