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Mastering CoreOS by Sreenivas Makam

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Container monitoring

As Containers run in their own namespaces, traditional Linux monitoring tools such as top, ps, tcpdump, and lsof from the host system do not help monitor the activity happening within a Container or between Containers. This makes it complex to troubleshoot Containers. Before we discuss tools available for Container monitoring, let's see the major items that we need to monitor:

  • The CPU usage by a Container and processes running inside a Container
  • The memory usage by a Container and processes running inside a Container
  • Network access for both incoming and outgoing connections
  • File I/O performed by Containers

The following are some approaches to monitor Containers:

  • Install monitoring software in the Container: This defeats the Container ...

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