ELB实例的查找方法

2013/12/18:更新这个,因为链接已经死了!

我安装了新的AWS cli工具:

$ pip install awscli

然后运行:

$ aws configure                                                                                                                                                
AWS Access Key ID [None]: my-key
AWS Secret Access Key [None]: my-secret
Default region name [None]: us-east-1
Default output format [None]:

~/.aws/config .

$ aws elb describe-load-balancers --load-balancer-name "my-name"
{
    "LoadBalancerDescriptions": [
        {
            "Subnets": [],
            "CanonicalHostedZoneNameID": "ID",
            "CanonicalHostedZoneName": "my-name-foo.us-east-1.elb.amazonaws.com",
            "ListenerDescriptions": [
                {
                    "Listener": {
                        "InstancePort": 80,
                        "LoadBalancerPort": 80,
                        "Protocol": "HTTP",
                        "InstanceProtocol": "HTTP"
                    },
                    "PolicyNames": []
                },
                {
                    "Listener": {
                        "InstancePort": 80,
                        "SSLCertificateId": "arn:aws:iam::x:server-certificate/x-ssl-prod",
                        "LoadBalancerPort": 443,
                        "Protocol": "HTTPS",
                        "InstanceProtocol": "HTTP"
                    },
                    "PolicyNames": [
                        "AWSConsole-SSLNegotiationPolicy-api-production"
                    ]
                }
            ],
            "HealthCheck": {
                "HealthyThreshold": 10,
                "Interval": 30,
                "Target": "HTTP:80/healthy.php",
                "Timeout": 5,
                "UnhealthyThreshold": 2
            },
            "BackendServerDescriptions": [],
            "Instances": [
                {
                    "InstanceId": "i-FIRST-INSTANCEID"
                },
                {
                    "InstanceId": "i-SECOND-INSTANCEID"
                }
            ],
            "DNSName": "my-name-foo.us-east-1.elb.amazonaws.com",
            "SecurityGroups": [],
            "Policies": {
                "LBCookieStickinessPolicies": [],
                "AppCookieStickinessPolicies": [],
                "OtherPolicies": [
                    "AWSConsole-SSLNegotiationPolicy-my-name"
                ]
            },
            "LoadBalancerName": "my-name",
            "CreatedTime": "2013-08-05T16:55:22.630Z",
            "AvailabilityZones": [
                "us-east-1d"
            ],
            "Scheme": "internet-facing",
            "SourceSecurityGroup": {
                "OwnerAlias": "amazon-elb",
                "GroupName": "amazon-elb-sg"
            }
        }
    ]
}

数据在 LoadBalancerDescriptions.Instances

我的负载平衡器叫做 my-name 这是创建时选择的名称。

下面是老答案!

我会检查这两个请求:

• DescribeLoadBalancers
• DescribeInstanceHealth

cli工具可能与这些类似?

嗯!

aws-cli jq 如果已安装,则可以使用以下命令获取关联的ec2实例ID:

aws elb describe-load-balancers --load-balancer-name my-elb \
  | jq -r '.LoadBalancerDescriptions[].Instances[].InstanceId'

这将返回与该ELB相关联的ec2 id。

旁注:我建议你安装 aws cli profiles

先决条件:已配置aws cli

pip install awscli
aws configure

配置:您的ELB名称

$ELB_NAME = "Your-elb-name"

复制粘贴终端

for ID in $(aws elb describe-load-balancers --load-balancer-name $ELB_NAME \
    --query LoadBalancerDescriptions[].Instances[].InstanceId \
    --output=text);
do
    aws ec2 describe-instances --instance-ids $ID \
        --query Reservations[].Instances[].PublicIpAddress \
        --output text
done

将输出公共IP的列表。也可以只在 for ID in $(...) 获取实例ID

请随意看看

aws elb describe-load-balancers --load-balancer-name $ELB_NAME
aws ec2 describe-instances --instance-ids $INSTANCE_ID

如果有人来找我 elb-describe-lbs EC2_REGION=eu-west-1 我的环境变量(或使用 elb-describe-lbs --region

用实际实例id替换实例id

aws elb describe-load-balancers --query "LoadBalancerDescriptions[*].{ID:LoadBalancerName,InstanceId:Instances[?InstanceId=='INSTANCEID'].InstanceId}[*].{ID:ID,InstanceId:InstanceId[0]}" --output=text | grep INSTANCEID | awk '{print $1}'

如果您想查看所有ELB和所附实例,请使用 JMESPath 这样地:

aws elb describe-load-balancers --query "LoadBalancerDescriptions[*].{ID:LoadBalancerName,InstanceId:Instances[*].InstanceId}[*]. {ELB:ID,InstanceId:InstanceId[*]}" --output=json

结果

[
    {
        "ELB": "my_name",
        "InstanceId": [
            "i-0cc72"
        ]
    },
    {
        "ELB": "my_name2",
        "InstanceId": [
            "i-02ff5f",
            "i-09e467"
        ]
    }
]

如果您知道ELB的名称并想查看所附内容,请使用如下JMESPath:

aws elb describe-load-balancers --load-balancer-name "my_name" --query "LoadBalancerDescriptions[].{ID:LoadBalancerName,InstanceId:Instances[].InstanceId}[].{ELB:ID,InstanceId:InstanceId[]}" --output=json

结果:

[
    {
        "ELB": "my_name",
        "InstanceId": [
            "i-02ff5f72",
            "i-09e46743"
        ]
    }
]

在节点.js你可以使用 aws-sdk .

var AWS = require('aws-sdk')
var options = {
  accessKeyId: 'accessKeyId',
  secretAccessKey: 'secretAccessKey',
  region: 'region'
}
var elb = new AWS.ELB(options)

elb.describeLoadBalancers({LoadBalancerNames: ['elbName']}, function(err, data) {
  if (err) {
    console.log('err: ', err)
  }
  else {
    console.log('data: ', data.LoadBalancerDescriptions)
  }
})

data.LoadBalancerDescriptions 是一个数组,数组中的每个元素都是具有 Instances 具有实例id的。

您可以循环使用所有负载平衡器实例ID,如下所示:

while read -r lb ; do echo -e "\n\n start lb: $lb " ; \
echo run cmd on lb: $lb ; echo " stop  lb: $lb" ; \
done < <(aws elb describe-load-balancers --query \
'LoadBalancerDescriptions[].Instances[].InstanceId' \
 --profile dev|perl -nle 's/\s+/\n/g;print')

您可以循环使用负载平衡器名称,如下所示:

    # how-to loop trough all your load balancer names 
    while read -r lb ; do \
        echo -e "\n\n start lb: $lb " ; \
        echo run cmd on lb: $lb ; \
        echo " stop  lb: $lb" ; \
    done < <(aws elb describe-load-balancers --query \
    'LoadBalancerDescriptions[].LoadBalancerName' \
    --profile rnd|perl -nle 's/\s+/\n/g;print')

如果已配置aws cli: http://docs.aws.amazon.com/cli/latest/topic/config-vars.html cat<<“EOF”>~/.aws/配置

[profile dev]
output = text
region = us-east-1
[profile dev]
output = text
region = us-east-1
[default]
output = text
region = Global

EOF 

并配置了安全凭据:

    # in aws admin console :
    # Services => iam => users => <<your_username>> => Security Credentials => Access Keys
    # configure the aws cli
    cat << "EOF" > ~/.aws/credentials
    [dev]
    aws_access_key_id = <<your_aws_access_key_id_in_the_dev_environment>>
    aws_secret_access_key = <<your_aws_secret_access_key_in_dev_env>>
    [dev]
    aws_access_key_id = <<your_aws_access_key_id_in_the_dev_environment>>
    aws_secret_access_key = <<your_aws_secret_access_key_in_dev_env>>
    [default]
    aws_access_key_id = <<your_aws_access_key_id_in_the_dev_environment>>
    aws_secret_access_key = <<your_aws_secret_access_key_in_dev_env>>
    EOF

elb-describe-lbs 获取负载平衡器及其名称的列表。

那就做吧 elb-describe-instance-health <LB_NAME> elb描述lbs

可以将AWS命令行工具与一些bash管道结合使用:

elb-describe-instance-health loadbalancer_name --region eu-west-1 | awk '{ print $2 }' | xargs ec2-describe-instances --region eu-west-1 | grep ^INSTANCE | awk '{ print $4 }'

这将为您提供连接到ELB的每个实例的公共DNS名称,您可以分别更改awk列以获取其他详细信息。