我正在尝试运行一个cloudformation堆栈来创建一个EMR集群,并将一个负载均衡器连接到该EMR的主节点。
要生成EMR集群,我在堆栈中使用以下代码:
"EmrCluster": {
"Type": "AWS::EMR::Cluster",
"DependsOn": "nat0a30a49f0c2913dc4",
"Properties": {
"Name": "EmrCluster",
"Applications": [
{
"Name": "Spark"
},
{
"Name": "Hive"
},
{
"Name": "Hadoop"
},
{
"Name": "Livy"
},
{
"Name": "Hue"
},
{
"Name": "Zeppelin"
}
],
"Instances": {
"AdditionalMasterSecurityGroups": [
{
"Ref": "sgMaster"
}
],
"Ec2KeyName": {"Ref": "KeyName"},
"Ec2SubnetId": {"Ref": "subnet03ead9bfe3352d90b"},
"MasterInstanceGroup": {
"InstanceCount": 1,
"InstanceType": "m3.xlarge",
"Name": "Master",
},
"CoreInstanceGroup": {
"InstanceCount": 2,
"InstanceType": "m3.xlarge",
"Name": "Core",
}
},
"Configurations": [
{
"Classification": "spark-env",
"Configurations": [
{
"Classification": "export",
"ConfigurationProperties": {
"PYSPARK_PYTHON": "/usr/bin/python3"
}
}
]
}
],
"JobFlowRole": "EMR_EC2_DefaultRole",
"ServiceRole": "EMR_DefaultRole",
"ReleaseLabel": "emr-5.13.0"
}
},
为了将负载均衡器连接到上述集群的主节点,我需要在以下代码中添加主节点的instanceID:
"loadBalancer" : {
"Type": "AWS::ElasticLoadBalancingV2::LoadBalancer",
"Properties": {
"Subnets" : [ {"Ref": "subnet04a1fe03c3f3c42fd"}, {"Ref" : "subnet03ead9bfe3352d90b"} ]
}
},
"TargetGroup" : {
"Type" : "AWS::ElasticLoadBalancingV2::TargetGroup",
"Properties" : {
"HealthCheckIntervalSeconds": 30,
"HealthCheckProtocol": "HTTP",
"HealthCheckTimeoutSeconds": 10,
"HealthyThresholdCount": 5,
"Matcher" : {
"HttpCode" : "200"
},
"Name": "MyTargets",
"Port": 8890,
"Protocol": "HTTP",
"Targets": [
{ "Id": {"Ref" : "MasternodeID"}, "Port": 8890 }
],
"UnhealthyThresholdCount": 3,
"VpcId": {"Ref" : "vpc07164705742b384fb"}
}
}
如何找到并传递EMR集群主节点的instanceID作为" MasternodeID"在目标群体中。简单来说,如何获取在同一堆栈中创建的EMR集群的主节点的instanceID。
答案 0 :(得分:1)
由于可用云形式提供公共主DNS,因此我已经从对我有用的DNS中获取了ip
EMRMasterTargetGroup:
Type: AWS::ElasticLoadBalancingV2::TargetGroup
DependsOn: EMRELB
Properties:
Name: emr-master-target-group
Protocol: HTTP
Port: 8088
VpcId: !Ref VPCId
HealthCheckPort: 8088
HealthCheckProtocol: HTTP
HealthCheckPath: /cluster
TargetType: ip
Targets:
- Id: !Join
- '.'
- - !Select [1, !Split ['-', !GetAtt EMRCluster.MasterPublicDNS]]
- !Select [2, !Split ['-', !GetAtt EMRCluster.MasterPublicDNS]]
- !Select [3, !Split ['-', !GetAtt EMRCluster.MasterPublicDNS]]
- !Select [0, !Split ['.', !Select [4, !Split ['-', !GetAtt EMRCluster.MasterPublicDNS]]]]
Port: 8088
Tags:
- Key: Name
Value: emr-master-target-group