一、实验概要

使用 CloudWatch 代理从 Amazon EC2 实例和本地服务器中收集指标、日志和跟踪信息。本实验概览如下：

• 创建CloudWatch代理运行角色
• 安装CloudWatch代理软件包
• 使用CloudWatch代理收集指标
• CloudWatch指标收集确认

二、实验操作步骤

2.1 创建 CloudWatch 代理运行角色

## 创建 CloudWatch 代理运行角色
- Name：xybCloudWatchAgentServerRole
- 权限：CloudWatchAgentServerPolicy
- 启动EC2，赋予角色权限

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "cloudwatch:PutMetricData",
                "ec2:DescribeVolumes",
                "ec2:DescribeTags",
                "logs:PutLogEvents",
                "logs:DescribeLogStreams",
                "logs:DescribeLogGroups",
                "logs:CreateLogStream",
                "logs:CreateLogGroup"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "ssm:GetParameter"
            ],
            "Resource": "arn:aws:ssm:*:*:parameter/AmazonCloudWatch-*"
        }
    ]
}

2.2 安装 CloudWatch 代理软件包

## 安装 CloudWatch 代理软件包
# 系统更新
$ sudo yum update -y

# 安装代理包
$ sudo yum install -y amazon-cloudwatch-agent

# 安装collectd
$ sudo yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
$ sudo yum install -y collectd

2.3 使用 CloudWatch代理收集指标

## 使用 CloudWatch代理收集指标
- 建立代理配置文件
- 启动CloudWatch代理

# 设置代理
sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-config-wizard

# 启动代理
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

# 代理启动进程确认
$ ps aux | grep agent

[ec2-user@ip-172-16-1-18 ~]$ cat /opt/aws/amazon-cloudwatch-agent/bin/config.json
{
        "agent": {
                "metrics_collection_interval": 60,
                "run_as_user": "root"
        },
        "metrics": {
                "aggregation_dimensions": [
                        [
                                "InstanceId"
                        ]
                ],
                "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": [
                                        "*"
                                ]
                        },
                        "mem": {
                                "measurement": [
                                        "mem_used_percent"
                                ],
                                "metrics_collection_interval": 60
                        },
                        "statsd": {
                                "metrics_aggregation_interval": 60,
                                "metrics_collection_interval": 60,
                                "service_address": ":8125"
                        }
                }
        }
}[ec2-user@ip-172-16-1-18 ~]$

[ec2-user@ip-172-16-1-18 ~]$ ps aux | grep agent
root      3091  0.0  1.2 714420 12508 ?        Ssl  01:35   0:00 /usr/bin/amazon-ssm-agent
root      3145  0.0  2.4 724104 23620 ?        Sl   01:35   0:01 /usr/bin/ssm-agent-worker
root      4072  0.2  6.4 789336 63164 ?        Ssl  03:14   0:00 /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent -config /opt/aws/amazon-cloudwatch-agent/etc/amazon-cloudwatch-agent.toml -envconfig /opt/aws/amazon-cloudwatch-agent/etc/env-config.json -pidfile /opt/aws/amazon-cloudwatch-agent/var/amazon-cloudwatch-agent.pid
ec2-user  4210  0.0  0.1 119432   980 pts/1    S+   03:18   0:00 grep --color=auto agent

2.4 CloudWatch指标收集确认

## CloudWatch指标收集确认

- CWAgent
	- ImageId,InstanceId,InstanceType
	- mem_used_percent

三、参考链接

🟢 使用 CloudWatch 代理从 Amazon EC2 实例和本地部署服务器中收集指标和日志 - Amazon CloudWatch