[英]Nodes are not discovered in OrientDB cluster with Kubernetes
我使用本指南在Kubernetes中設置OrientDB集群。 但是,似乎每個Pod上的每個節點都創建自己的群集,而不是加入共享的群集。 因此,每個Pod上的日志顯示如下消息:
Members [1] {
Member [pod-ip]:5701 - generated id
}
什么會引起這樣的問題?
我的orientdb-server-config文件看起來是這樣的:
<handler class="com.orientechnologies.orient.server.hazelcast.OHazelcastPlugin">
<parameters>
<parameter value="true" name="enabled"/>
<parameter value="orientdb/config/default-distributed-db-config.json" name="configuration.db.default"/>
<parameter value="orientdb/config/hazelcast.xml" name="configuration.hazelcast"/>
<parameter name="nodeName" value="$pod_dns" />
</parameters>
</handler>
我的hazelcast.xml文件如下所示(pod_dns是存儲在env中的pod的名稱):
</network>
<properties>
<property name="hazelcast.discovery.enabled">true</property>
</properties>
<network>
<join>
<multicast enabled="false"/>
<tcp-ip enabled="false"/>
<discovery-strategies>
<discovery-strategy enabled="true"
class="com.hazelcast.kubernetes.HazelcastKubernetesDiscoveryStrategy">
<properties>
<property name="service-dns">pod_dns.default.svc.cluster.local</property>
<property name="service-dns-timeout">10</property>
</properties>
</discovery-strategy>
</discovery-strategies>
</join>
</network>
Kubernetes StatefulSet。 將安裝並執行用於hazelcast和orientdb-server-config文件的Bash腳本(用於根據每個Pod上的env值進行設置更新):
kind: StatefulSet
apiVersion: apps/v1
metadata:
name: orientdbservice
spec:
serviceName: orientdbservice
replicas: 3
podManagementPolicy: Parallel
selector:
matchLabels:
service: orientdb
type: container-deployment
template:
metadata:
labels:
service: orientdb
type: container-deployment
spec:
containers:
- name: orientdbservice
image: orientdb:2.2.36
command: ["/bin/sh","-c", " cp /configs/* /orientdb/config/ ; chmod +x /orientdb/config/hazelcast_template.sh ; chmod +x /orientdb/config/server_config_template.sh ; sh /orientdb/config/hazelcast_template.sh ; sh /orientdb/config/server_config_template.sh ; /orientdb/bin/server.sh -Ddistributed=true" ]
env:
- name: ORIENTDB_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: orientdb-password
key: password.txt
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
ports:
- containerPort: 2424
name: port-binary
- containerPort: 2480
name: port-http
- containerPort: 5701
name: hazelcast
volumeMounts:
- name: config
mountPath: /orientdb/config
- name: orientdb-config-template-hazelcast
mountPath: /configs/hazelcast_template.sh
subPath: hazelcast_template.sh
- name: orientdb-config-template-server
mountPath: /configs/server_config_template.sh
subPath: server_config_template.sh
- name: orientdb-config-distributed
mountPath: /configs/default-distributed-db-config.json
subPath: default-distributed-db-config.json
- name: orientdb-databases
mountPath: /orientdb/databases
- name: orientdb-backup
mountPath: /orientdb/backup
volumes:
- name: config
emptyDir: {}
- name: orientdb-config-template-hazelcast
configMap:
name: orientdb-configmap-template-hazelcast
- name: orientdb-config-template-server
configMap:
name: orientdb-configmap-template-server
- name: orientdb-config-distributed
configMap:
name: orientdb-configmap-distributed
volumeClaimTemplates:
- metadata:
name: orientdb-databases
labels:
service: orientdb
type: pv-claim
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 20Gi
- metadata:
name: orientdb-backup
labels:
service: orientdb
type: pv-claim
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 10Gi
問題出在Hazelcast0Kubernetes插件配置中。 首先,必須將OrientDB版本更新為最新版本-具有嵌入式最新的Hazelcast版本的3.0.10。 另外,我已經將hazelcast-kubernetes.jar依賴文件直接安裝到/ orientdb / lib文件夾中,並且開始正常工作。 問題不在於配置文件,而是與OrientDB的依賴項設置有關。
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