我目前正在使用bitnami / kafka映像(https://hub.docker.com/r/bitnami/kafka)并将其部署在kubernetes上。
在集群中,其他应用程序可以找到kafka。尝试从群集外部访问kafka容器时发生问题。当我读了一点时,我读到我们需要为外部kafka客户端设置属性“ advertised.listener = PLAINTTEXT:// hostname:port_number”。
我当前引用的是“ https://github.com/bitnami/charts/tree/master/bitnami/kafka”。在我的values.yaml文件中添加了
values.yaml
和 statefulset.yaml
- name: KAFKA_CFG_ADVERTISED_LISTENERS
value: 'PLAINTEXT://{{ .Values.advertisedListeners }}:9092'
对于单个kafka实例,它可以正常工作。
但是对于3节点kafka集群,我更改了一些如下配置: values.yaml
和 Statefulset.yaml
- name: KAFKA_CFG_ADVERTISED_LISTENERS
{{- if $MY_POD_NAME := "kafka-0" }}
value: 'PLAINTEXT://{{ .Values.advertisedListeners1 }}:9092'
{{- else if $MY_POD_NAME := "kafka-1" }}
value: 'PLAINTEXT://{{ .Values.advertisedListeners2 }}:9092'
{{- else if $MY_POD_NAME := "kafka-2" }}
value: 'PLAINTEXT://{{ .Values.advertisedListeners3 }}:9092'
{{- end }}
预期结果是,所有3个kafka实例均应做advertised.listener属性设置为工作节点的IP地址。
示例:
kafka-0->“ PLAINTEXT://10.21.0.191:9092”
kafka-1->“ PLAINTEXT://10.21.0.192:9092”
kafka-3->“ PLAINTEXT://10.21.0.193:9092”
目前,只有一个kafka pod处于运行状态,而另外两个则进入crashloopbackoff状态。
和另外两个Pod显示错误为:
[2019-10-20 13:09:37,753]信息[LogDirFailureHandler]:正在启动(kafka.server.ReplicaManager $ LogDirFailureHandler) [2019-10-20 13:09:37,786]错误[KafkaServer id = 1002] KafkaServer启动期间发生致命错误。准备关闭(kafka.server.KafkaServer) java.lang.IllegalArgumentException:要求失败:代理1001已注册了通告的侦听器中的已配置端点10.21.0.191:9092 在scala.Predef $ .require(Predef.scala:224) 在kafka.server.KafkaServer $$ anonfun $ createBrokerInfo $ 2.apply(KafkaServer.scala:399) 在kafka.server.KafkaServer $$ anonfun $ createBrokerInfo $ 2.apply(KafkaServer.scala:397) 在scala.collection.mutable.ResizableArray $ class.foreach(ResizableArray.scala:59) 在scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48) 在kafka.server.KafkaServer.createBrokerInfo(KafkaServer.scala:397) 在kafka.server.KafkaServer.startup(KafkaServer.scala:261) 在kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:38) 在kafka.Kafka $ .main(Kafka.scala:84) 在kafka.Kafka.main(Kafka.scala)
这意味着statefulset.yaml中应用的逻辑不起作用。 有人可以帮助我解决这个问题吗?
任何帮助将不胜感激。
kubectl get statefulset kafka -o yaml
apiVersion: apps/v1
kind: StatefulSet
metadata:
creationTimestamp: "2019-10-29T07:04:12Z"
generation: 1
labels:
app.kubernetes.io/component: kafka
app.kubernetes.io/instance: kafka
app.kubernetes.io/managed-by: Tiller
app.kubernetes.io/name: kafka
helm.sh/chart: kafka-6.0.1
name: kafka
namespace: default
resourceVersion: "12189730"
selfLink: /apis/apps/v1/namespaces/default/statefulsets/kafka
uid: d40cfd5f-46a6-49d0-a9d3-e3a851356063
spec:
podManagementPolicy: Parallel
replicas: 3
revisionHistoryLimit: 10
selector:
matchLabels:
app.kubernetes.io/component: kafka
app.kubernetes.io/instance: kafka
app.kubernetes.io/name: kafka
serviceName: kafka-headless
template:
metadata:
creationTimestamp: null
labels:
app.kubernetes.io/component: kafka
app.kubernetes.io/instance: kafka
app.kubernetes.io/managed-by: Tiller
app.kubernetes.io/name: kafka
helm.sh/chart: kafka-6.0.1
name: kafka
spec:
containers:
- env:
- name: MY_POD_IP
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: status.podIP
- name: MY_POD_NAME
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: metadata.name
- name: KAFKA_CFG_ZOOKEEPER_CONNECT
value: kafka-zookeeper
- name: KAFKA_PORT_NUMBER
value: "9092"
- name: KAFKA_CFG_LISTENERS
value: PLAINTEXT://:$(KAFKA_PORT_NUMBER)
- name: KAFKA_CFG_ADVERTISED_LISTENERS
value: PLAINTEXT://10.21.0.191:9092
- name: ALLOW_PLAINTEXT_LISTENER
value: "yes"
- name: KAFKA_CFG_BROKER_ID
value: "-1"
- name: KAFKA_CFG_DELETE_TOPIC_ENABLE
value: "false"
- name: KAFKA_HEAP_OPTS
value: -Xmx1024m -Xms1024m
- name: KAFKA_CFG_LOG_FLUSH_INTERVAL_MESSAGES
value: "10000"
- name: KAFKA_CFG_LOG_FLUSH_INTERVAL_MS
value: "1000"
- name: KAFKA_CFG_LOG_RETENTION_BYTES
value: "1073741824"
- name: KAFKA_CFG_LOG_RETENTION_CHECK_INTERVALS_MS
value: "300000"
- name: KAFKA_CFG_LOG_RETENTION_HOURS
value: "168"
- name: KAFKA_CFG_LOG_MESSAGE_FORMAT_VERSION
- name: KAFKA_CFG_MESSAGE_MAX_BYTES
value: "1000012"
- name: KAFKA_CFG_LOG_SEGMENT_BYTES
value: "1073741824"
- name: KAFKA_CFG_LOG_DIRS
value: /bitnami/kafka/data
- name: KAFKA_CFG_DEFAULT_REPLICATION_FACTOR
value: "1"
- name: KAFKA_CFG_OFFSETS_TOPIC_REPLICATION_FACTOR
value: "1"
- name: KAFKA_CFG_TRANSACTION_STATE_LOG_REPLICATION_FACTOR
value: "1"
- name: KAFKA_CFG_SSL_ENDPOINT_IDENTIFICATION_ALGORITHM
value: https
- name: KAFKA_CFG_TRANSACTION_STATE_LOG_MIN_ISR
value: "1"
- name: KAFKA_CFG_NUM_IO_THREADS
value: "8"
- name: KAFKA_CFG_NUM_NETWORK_THREADS
value: "3"
- name: KAFKA_CFG_NUM_PARTITIONS
value: "1"
- name: KAFKA_CFG_NUM_RECOVERY_THREADS_PER_DATA_DIR
value: "1"
- name: KAFKA_CFG_SOCKET_RECEIVE_BUFFER_BYTES
value: "102400"
- name: KAFKA_CFG_SOCKET_REQUEST_MAX_BYTES
value: "104857600"
- name: KAFKA_CFG_SOCKET_SEND_BUFFER_BYTES
value: "102400"
- name: KAFKA_CFG_ZOOKEEPER_CONNECTION_TIMEOUT_MS
value: "6000"
image: docker.io/bitnami/kafka:2.3.0-debian-9-r88
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 2
initialDelaySeconds: 10
periodSeconds: 10
successThreshold: 1
tcpSocket:
port: kafka
timeoutSeconds: 5
name: kafka
ports:
- containerPort: 9092
name: kafka
protocol: TCP
readinessProbe:
failureThreshold: 6
initialDelaySeconds: 5
periodSeconds: 10
successThreshold: 1
tcpSocket:
port: kafka
timeoutSeconds: 5
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /bitnami/kafka
name: data
dnsPolicy: ClusterFirst
restartPolicy: Always
schedulerName: default-scheduler
securityContext:
fsGroup: 1001
runAsUser: 1001
terminationGracePeriodSeconds: 30
updateStrategy:
type: RollingUpdate
volumeClaimTemplates:
- metadata:
creationTimestamp: null
name: data
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 8Gi
volumeMode: Filesystem
status:
phase: Pending
status:
collisionCount: 0
currentReplicas: 3
currentRevision: kafka-56ff499d74
observedGeneration: 1
readyReplicas: 1
replicas: 3
updateRevision: kafka-56ff499d74
updatedReplicas: 3
答案 0 :(得分:1)
我看到您在为StatefulSet中的不同容器传递不同的环境变量时遇到麻烦。
您正在尝试使用头盔模板实现这一目标:
- name: KAFKA_CFG_ADVERTISED_LISTENERS
{{- if $MY_POD_NAME := "kafka-0" }}
value: 'PLAINTEXT://{{ .Values.advertisedListeners1 }}:9092'
{{- else if $MY_POD_NAME := "kafka-1" }}
value: 'PLAINTEXT://{{ .Values.advertisedListeners2 }}:9092'
{{- else if $MY_POD_NAME := "kafka-2" }}
value: 'PLAINTEXT://{{ .Values.advertisedListeners3 }}:9092'
{{- end }}
在helm template guide documentation中,您可以找到以下说明:
在Helm模板中,变量是对另一个对象的命名引用。 它遵循$ name格式。变量使用特殊的赋值运算符进行赋值::=。
现在让我们看看您的代码:
{{- if $MY_POD_NAME := "kafka-0" }}
这是变量分配,不是比较和
完成此分配后,if
语句将该表达式计算为true
,这就是为什么在您的
staefulset yaml
表示您将其视为输出:
- name: KAFKA_CFG_ADVERTISED_LISTENERS
value: PLAINTEXT://10.21.0.191:9092
为使其按预期工作,您不应使用头盔模板。这是行不通的。
一种方法是为每个kafka节点创建单独的环境变量 并将所有这些变量传递给所有pod,如下所示:
- env:
- name: MY_POD_NAME
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: metadata.name
- name: KAFKA_0
value: 10.21.0.191
- name: KAFKA_1
value: 10.21.0.192
- name: KAFKA_2
value: 10.21.0.193
# - name: KAFKA_CFG_ADVERTISED_LISTENERS
# value: PLAINTEXT://$MY_POD_NAME:9092
,并使用修改后的启动脚本创建自己的docker映像,该脚本将导出KAFKA_CFG_ADVERTISED_LISTENERS
变量
的值取决于MY_POD_NAME
。
如果您不想创建自己的映像,则可以创建经过修改的ConfigMap
的{{1}}并将其装入
代替旧的entrypoint.sh
(您也可以使用其他任何文件,只需看看here
有关如何构建kafka图像的更多信息)。
安装entrypoint.sh
如下:
ConfigMap
请告诉我是否有帮助。