【云原生】Apache Livy on k8s 讲解与实战操作

作者：liugp 2023-03-03 07:54:21云计算 云原生 Livy是云原一个提供Rest接口和spark集群交互的服务。它可以提交Spark Job或者Spark一段代码,讲解实同步或者异步的返回结果;也提供Sparkcontext的管理,通过Restful接口或RPC客户端库。

一、战操作概述

Livy是云原一个提供Rest接口和spark集群交互的服务。它可以提交Spark Job或者Spark一段代码,讲解实同步或者异步的返回结果;也提供Sparkcontext的管理,通过Restful接口或RPC客户端库。Livy也简化了与Spark与应用服务的战操作交互,这允许通过web/mobile与Spark的使用交互。

官网：https://livy.incubator.apache.org/GitHub地址：https://github.com/apache/incubator-livy关于Apache Livy更多介绍也可以参考我这篇文章：​Spark开源REST服务——Apache Livy（Spark 客户端）

二、云原开始编排部署

1）部署包准备

这里也提供上面编译好的讲解实livy部署包，有需要的战操作小伙伴可以自行下载：

链接：https://pan.baidu.com/s/1pPCbe0lUJ6ji8rvQYsVw9A?pwd=qn7i提取码：​qn7i

1）构建镜像

Dockerfile

FROM myharbor.com/bigdata/centos:7.9.2009

RUN rm -f /etc/localtime && ln -sv /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo "Asia/Shanghai" > /etc/timezone
RUN export LANG=zh_CN.UTF-8

### install tools
RUN yum install -y vim tar wget curl less telnet net-tools lsof

RUN groupadd --system --gid=9999 admin && useradd --system -m /home/admin --uid=9999 --gid=admin admin

RUN mkdir -p /opt/apache

ADD apache-livy-0.8.0-incubating-SNAPSHOT-bin.zip /opt/apache/
ENV LIVY_HOME=/opt/apache/apache-livy
RUN ln -s /opt/apache/apache-livy-0.8.0-incubating-SNAPSHOT-bin $LIVY_HOME

ADD hadoop-3.3.2.tar.gz /opt/apache/
ENV HADOOP_HOME=/opt/apache/hadoop
RUN ln -s /opt/apache/hadoop-3.3.2 $HADOOP_HOME
ENV HADOOP_CONFIG_DIR=${ HADOOP_HOME}/etc/hadoop

ADD spark-3.3.0-bin-hadoop3.tar.gz /opt/apache/
ENV SPARK_HOME=/opt/apache/spark
RUN ln -s /opt/apache/spark-3.3.0-bin-hadoop3 $SPARK_HOME

ENV PATH=${ LIVY_HOME}/bin:${ HADOOP_HOME}/bin:${ SPARK_HOME}/bin:$PATH

RUN chown -R admin:admin /opt/apache

WORKDIR $LIVY_HOME

ENTRYPOINT ${ LIVY_HOME}/bin/livy-server start;tail -f ${ LIVY_HOME}/logs/livy-root-server.out

【注意】hadoop包里的core-site.xml，hdfs-site.xml，云原yarn-site.xml

开始构建镜像

docker build -t myharbor.com/bigdata/livy:0.8.0 . --no-cache

### 参数解释
# -t：指定镜像名称
# . ：当前目录Dockerfile
# -f：指定Dockerfile路径
#  --no-cache：不缓存

# 推送到harbor
docker push myharbor.com/bigdata/livy:0.8.0

2）创建livy chart模板

helm create livy

3）修改yaml编排

• livy/values.yaml

replicaCount: 1

image:
repository: myharbor.com/bigdata/livy
pullPolicy: IfNotPresent
# Overrides the image tag whose default is the chart appVersion.
tag: "0.8.0"

securityContext:
runAsUser: 9999
runAsGroup: 9999
privileged: true

service:
type: NodePort
port: 8998
nodePort: 31998

• livy/templates/configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
name: { {  include "livy.fullname" . }}
labels:
{ { - include "livy.labels" . | nindent 4 }}
data:
livy.conf: |-
livy.spark.master = yarn
livy.spark.deploy-mode = client
livy.environment = production
livy.impersonation.enabled = true
livy.server.csrf_protection.enabled = false
livy.server.port = { {  .Values.service.port }}
livy.server.session.timeout = 3600000
livy.server.recovery.mode = recovery
livy.server.recovery.state-store = filesystem
livy.server.recovery.state-store.url = /tmp/livy
livy.repl.enable-hive-context = true
livy-env.sh: |-
export JAVA_HOME=/opt/apache/jdk1.8.0_212
export HADOOP_HOME=/opt/apache/hadoop
export HADOOP_CONF_DIR=/opt/apache/hadoop/etc/hadoop
export SPARK_HOME=/opt/apache/spark
export SPARK_CONF_DIR=/opt/apache/spark/conf
export LIVY_LOG_DIR=/opt/apache/livy/logs
export LIVY_PID_DIR=/opt/apache/livy/pid-dir
export LIVY_SERVER_JAVA_OPTS="-Xmx512m"
spark-blacklist.conf: |-
spark.master
spark.submit.deployMode

# Disallow overriding the location of Spark cached jars.
spark.yarn.jar
spark.yarn.jars
spark.yarn.archive

# Don't allow users to override the RSC timeout.
livy.rsc.server.idle-timeout

• livy/templates/deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
name: { {  include "livy.fullname" . }}
labels:
{ { - include "livy.labels" . | nindent 4 }}
spec:
{ { - if not .Values.autoscaling.enabled }}
replicas: { {  .Values.replicaCount }}
{ { - end }}
selector:
matchLabels:
{ { - include "livy.selectorLabels" . | nindent 6 }}
template:
metadata:
{ { - with .Values.podAnnotations }}
annotations:
{ { - toYaml . | nindent 8 }}
{ { - end }}
labels:
{ { - include "livy.selectorLabels" . | nindent 8 }}
spec:
{ { - with .Values.imagePullSecrets }}
imagePullSecrets:
{ { - toYaml . | nindent 8 }}
{ { - end }}
serviceAccountName: { {  include "livy.serviceAccountName" . }}
securityContext:
{ { - toYaml .Values.podSecurityContext | nindent 8 }}
containers:
- name: { {  .Chart.Name }}
securityContext:
{ { - toYaml .Values.securityContext | nindent 12 }}
image: "` `.`Values`.`image`.`repository `:{ {  .Values.image.tag | default .Chart.AppVersion }}"
imagePullPolicy: { {  .Values.image.pullPolicy }}
ports:
- name: http
containerPort: 8998
protocol: TCP
livenessProbe:
httpGet:
path: /
port: http
readinessProbe:
httpGet:
path: /
port: http
resources:
{ { - toYaml .Values.resources | nindent 12 }}
{ { - with .Values.securityContext }}
securityContext:
runAsUser: { {  .runAsUser }}
runAsGroup: { {  .runAsGroup }}
privileged: { {  .privileged }}
{ { - end }}
volumeMounts:
- name: { {  .Release.Name }}-livy-conf
mountPath: /opt/apache/livy/conf/livy.conf
subPath: livy.conf
- name: { {  .Release.Name }}-livy-env
mountPath: /opt/apache/livy/conf/livy-env.sh
subPath: livy-env.sh
- name: { {  .Release.Name }}-spark-blacklist-conf
mountPath: /opt/apache/livy/conf/spark-blacklist.conf
subPath: spark-blacklist.conf
{ { - with .Values.nodeSelector }}
nodeSelector:
{ { - toYaml . | nindent 8 }}
{ { - end }}
{ { - with .Values.affinity }}
affinity:
{ { - toYaml . | nindent 8 }}
{ { - end }}
{ { - with .Values.tolerations }}
tolerations:
{ { - toYaml . | nindent 8 }}
{ { - end }}
volumes:
- name: { {  .Release.Name }}-livy-conf
configMap:
name: { {  include "livy.fullname" . }}
- name: { {  .Release.Name }}-livy-env
configMap:
name: { {  include "livy.fullname" . }}
- name: { {  .Release.Name }}-spark-blacklist-conf
configMap:
name: { {  include "livy.fullname" . }}

4）开始部署

helm install livy ./livy -n livy --create-namespace

NOTES

NOTES:
1. Get the application URL by running these commands:
export NODE_PORT=$(kubectl get --namespace livy -o jsnotallow="{ .spec.ports[0].nodePort}" services livy)
export NODE_IP=$(kubectl get nodes --namespace livy -o jsnotallow="{ .items[0].status.addresses[0].address}")
echo http://$NODE_IP:$NODE_PORT

查看

kubectl get pods,svc -n livy -owide

web地址：http://192.168.182.110:31998/ui

5）测试验证

curl -s -XPOST -d '{ "file":"hdfs://myhdfs/tmp/spark-examples_2.12-3.3.0.jar","className":"org.apache.spark.examples.SparkPi","name":"SparkPi-test"}'  -H "Content-Type: application/json"  http://local-168-182-110:31998/batches|python -m json.tool

6）卸载

helm uninstall livy -n livy

git地址：https://gitee.com/hadoop-bigdata/livy-on-k8s

责任编辑：武晓燕 来源： 大数据与云原生技术分享 云原生ApacheSpark

(责任编辑：时尚)