AWS EC2配置CloudWatch

 1.创建IAM角色并关联到EC2

2.安装cloudwatch代理

3.生成代理配置文件

4.启动代理

Linux
sudo mkdir -p /usr/share/collectd
cd /usr/share/collectd
sudo touch types.db
sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a fetch-config -m ec2 -s -c file:/opt/aws/amazon-cloudwatch-agent/bin/config.json
sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -m ec2 -a status

tail -f /opt/aws/amazon-cloudwatch-agent/logs/configuration-validation.log

Windows（powershell下执行）

& "C:\Program Files\Amazon\AmazonCloudWatchAgent\amazon-cloudwatch-agent-ctl.ps1" -a fetch-config -m ec2 -s -c file:"C:\Program Files\Amazon\AmazonCloudWatchAgent\config.json"

 

5.创建报警规则

常用命令：

sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-config-wizard   //配置向导，自动生成配置文件

sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -m ec2 -a stop   //停止agent

sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -m ec2 -a start  //启动agent

sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -m ec2 -a status //查询agent状态

sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a fetch-config -m ec2 -s -c file:/opt/aws/amazon-cloudwatch-agent/bin/config.json  //重新加载配置文件

 

修改agent配置参数：

sudo vi /opt/aws/amazon-cloudwatch-agent/bin/config.json

重启agent使配置生效：

sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a fetch-config -m ec2 -s -c file:/opt/aws/amazon-cloudwatch-agent/bin/config.json

 

当前配置config.json示例：

{

        "agent": {

                "metrics_collection_interval": 60,

                "run_as_user": "root"

        },

        "metrics": {

                "append_dimensions": {

                        "AutoScalingGroupName": "${aws:AutoScalingGroupName}",

                        "ImageId": "${aws:ImageId}",

                        "InstanceId": "${aws:InstanceId}",

                        "InstanceType": "${aws:InstanceType}"

                },

                "metrics_collected": {

                        "collectd": {

                                "metrics_aggregation_interval": 60

                        },

                        "disk": {

                                "measurement": [

                                        "used_percent"

                                ],

                                "metrics_collection_interval": 60,

                                "resources": [

                                        "/",

                                        "/mnt"

                                ]

                        },

                        "mem": {

                                "measurement": [

                                        "mem_used_percent"

                                ],

                                "metrics_collection_interval": 60

                        },

                        "statsd": {

                                "metrics_aggregation_interval": 60,

                                "metrics_collection_interval": 10,

                                "service_address": ":8125"

                        }

                }

        }

}

amazon-cloudwatch-agent-ctl参数说明：

usage: amazon-cloudwatch-agent-ctl -a

stop|start|status|fetch-config|append-config|remove-config [-m

ec2|onPremise|auto] [-c default|all|ssm:<parameter-store-name>|file:<file-path>] [-o default|all|ssm:<parameter-store-name>|file:<file-path>] [-s]

 

e.g.

1. apply a SSM parameter store config on EC2 instance and restart the agent afterwards:

    amazon-cloudwatch-agent-ctl -a fetch-config -m ec2 -c ssm:AmazonCloudWatch-Config.json -s

2. append a local json config file on onPremise host and restart the agent afterwards:

    amazon-cloudwatch-agent-ctl -a append-config -m onPremise -c file:/tmp/config.json -s

3. query agent status:

    amazon-cloudwatch-agent-ctl -a status

 

-a: action

    stop:                                   stop the agent process.

    start:                                  start the agent process.

    status:                                 get the status of the agent process.

    fetch-config:                           apply config for agent, followed by -c or -o or both. Target config can be based on location (ssm parameter store name, file name), or 'default'.

    append-config:                          append json config with the existing json configs if any, followed by -c. Target config can be based on the location (ssm parameter store name, file name), or 'default'.

    remove-config:                          remove config for agent, followed by -c or -o or both. Target config can be based on the location (ssm parameter store name, file name), or 'all'.

 

-m: mode

    ec2:                                    indicate this is on ec2 host.

    onPremise:                              indicate this is on onPremise host.

    auto:                                   use ec2 metadata to determine the environment, may not be accurate if ec2 metadata is not available for some reason on EC2.

 

-c: amazon-cloudwatch-agent configuration

    default:                                default configuration for quick trial.

    ssm:<parameter-store-name>:             ssm parameter store name.

    file:<file-path>:                       file path on the host.

    all:                                    all existing configs. Only apply to remove-config action.

 

-o: cwagent-otel-collector configuration

    default:                                default configuration for quick trial.

    ssm:<parameter-store-name>:             ssm parameter store name.

    file:<file-path>:                       file path on the host.

    all:                                    all existing configs. Only apply to remove-config action.

 

-s: optionally restart after configuring the agent configuration

    this parameter is used for 'fetch-config', 'append-config', 'remove-config' action only.

参考来源：https://docs.amazonaws.cn/AmazonCloudWatch/latest/monitoring/Install-CloudWatch-Agent.html