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Enterprise Distributed Application Service:FAQ about log collectors

Last Updated:Aug 08, 2023

  1. Can I install a log collector on multiple ECS instances in a VPC?

    A: Yes. We recommend that you install a log collector on each Elastic Compute Service (ECS) instance in a cluster in a virtual private cloud (VPC), especially when the cluster is large.

  2. Is the bandwidth that is consumed by a log collector billed?

    A: No. A log collector consumes internal bandwidth. Therefore, Alibaba Cloud does not bill this part of traffic.

  3. Must I install EDAS Agent on an ECS instance on which a log collector is installed?

    A: No. However, we recommend that you install a log collector on an ECS instance on which Enterprise Distributed Application Service (EDAS) Agent is installed.

  4. What happens if I do not install a log collector?

    A: The impact is reflected on EDAS services. If no data is collected, services related to views and traces become unavailable. Such services include infrastructure monitoring, service monitoring, alerting, tracing, and scaling.

  5. In the final stage of the installation process, the message setup sproxy failed frequently appears. Does the installation process fail?

    A: No. This problem occurs because the installation script checks whether a connection is set up, but the interval between module startup and connection setup is large. We recommend that, one minute after the installation is complete, you manually check whether port 8002 has been set up.

  6. What operating systems support log collectors?

    A: Log collectors are supported by 64-bit CentOS 7.0 and later and 64-bit Alibaba Cloud Linux 15.1 and later.

  7. Why am I unable to query traces or monitor data in the VPC environment?

    A:

    • Traces and monitoring data are generated only when request traffic is detected. If no customer visits the website, no data is generated to form a chart.

    • Make sure that port 8182 of each ECS instance is enabled. To check whether the port is enabled, run the netstat -antp|grep 8182 command.