Question

我使用AWS ElasticBeanstalk和Tomcat作为Web服务器。我想调试并记录Java虚拟机性能，崩溃报告并将它们写入CloudWatch Logs。

目前，AWS ElasticBeanstalk收集由Web服务器，应用程序服务器，Elastic Beanstalk平台脚本创建的日志。您可以将CloudWatch日志用作集中式日志系统。

我如何在开始时提到的CloudWatch中收集自定义JVM日志？

感谢。

林

Answer 1

我已经联系了AWS支持团队，他们的答案是：

这可以使用.ebextensions配置文件安装awslogs软件包并定义日志文件，log_group_name和log_stream名称以在CloudWatch上流式传输来完成，

请在下面找到用于在CloudWatch for Tomcat8环境中启用Catalina日志的示例 ---。ebextensions / cwatch.config ---

packages:
  yum:
    awslogs: []

files:
  "/etc/awslogs/awscli.conf" :
    mode: "000600"
    owner: root
    group: root
    content: |
      [plugins]
      cwlogs = cwlogs
      [default]
      region = `{"Ref":"AWS::Region"}`

  "/etc/awslogs/awslogs.conf" :
    mode: "000600"
    owner: root
    group: root
    content: |
      [general]
      state_file = /var/lib/awslogs/agent-state

      [/var/log/tomcat8]
      log_group_name = `{"Fn::Join":["-", [{ "Ref":"AWSEBEnvironmentName" }, "catalina"]]}`
      log_stream_name = {instance_id}_messages
      file = /var/log/tomcat8/catalina.out
      datetime_format = %b %d %H:%M:%S
      initial_position = start_of_file
      buffer_duration = 5000

      [/var/log/messages]
      log_group_name = `{"Fn::Join":["-", [{ "Ref":"AWSEBEnvironmentName" }, "syslog"]]}`
      log_stream_name = {instance_id}_messages
      file = /var/log/messages
      datetime_format = %b %d %H:%M:%S
      initial_position = start_of_file
      buffer_duration = 5000

      [/var/log/eb-activity.log]
      log_group_name = `{"Fn::Join":["-", [{ "Ref":"AWSEBEnvironmentName" }, "eb"]]}`
      log_stream_name = {instance_id}_eb-activity.log
      file = /var/log/eb-activity.log
      datetime_format = [%Y-%m-%dT%H:%M:%S.%3NZ]
      initial_position = start_of_file
      buffer_duration = 5000

      [/var/log/eb-cfn-init.log]
      log_group_name = `{"Fn::Join":["-", [{ "Ref":"AWSEBEnvironmentName" }, "eb"]]}`
      log_stream_name = {instance_id}_eb-cfn-init.log
      file = /var/log/eb-cfn-init.log
      datetime_format = [%Y-%m-%dT%H:%M:%S.%3NZ]
      initial_position = start_of_file
      buffer_duration = 5000

      [/var/log/eb-commandprocessor.log]
      log_group_name = `{"Fn::Join":["-", [{ "Ref":"AWSEBEnvironmentName" }, "eb"]]}`
      log_stream_name = {instance_id}_eb-commandprocessor.log
      file = /var/log/eb-commandprocessor.log
      datetime_format = [%Y-%m-%dT%H:%M:%S.%3NZ]
      initial_position = start_of_file
      buffer_duration = 5000

      [/var/log/eb-publish-logs.log]
      log_group_name = `{"Fn::Join":["-", [{ "Ref":"AWSEBEnvironmentName" }, "eb"]]}`
      log_stream_name = {instance_id}_eb-publish-logs.log
      file = /var/log/eb-publish-logs.log
      datetime_format = %Y-%m-%d %H:%M:%S,%3N
      initial_position = start_of_file
      buffer_duration = 5000

      [/var/log/eb-tools.log]
      log_group_name = `{"Fn::Join":["-", [{ "Ref":"AWSEBEnvironmentName" }, "eb"]]}`
      log_stream_name = {instance_id}_eb-tools.log
      file = /var/log/eb-tools.log
      datetime_format = %Y-%m-%d %H:%M:%S,%3N
      initial_position = start_of_file
      buffer_duration = 5000

commands:
  "01":
    command: chkconfig awslogs on
  "02":
    command: service awslogs restart
---end---

and here is a simpler version to Add log to default CloudWatch logs streaming config

Warning: does not set retention policy, won't obey retention policy (e.g "delete when env is deleted)

---.ebextensions/log.config---
files:
  /etc/awslogs/config/mylog.conf:
    owner: root
    group: root
    mode: "000644"
    content:
      Fn::Sub: |
        [/var/log/mylog.log]
        log_group_name=/aws/elasticbeanstalk/${AWSEBEnvironmentName}/var/log/mylog.log
        log_stream_name={instance_id}
        file=/var/log/mylog.log

commands:
  restart_awslogs:
    command: service awslogs restart || service awslogs start
---end---

注意：请勿使用生产中提供的样品。该示例的目的是说明功能。” 我没有检查它，但是如果有人将测试此解决方案，请发表评论并将其标记为有效。如果没有，我将删除答案。

从AWS ElasticBeanstalk收集JVM堆转储

1 个答案: