Answers to common questions about EDAS log collector installation, compatibility, billing, and troubleshooting on Elastic Compute Service (ECS) instances.
Quick diagnostic reference
Use these commands to verify log collector status:
Check | Command | Expected result |
Post-installation connection (port 8002) | netstat -antp|grep 8002 | Port 8002 is listening |
Trace and monitoring data (port 8182) | netstat -antp|grep 8182 | Port 8182 is listening |
Can I install a log collector on multiple ECS instances in a VPC?
Yes. Install a log collector on each ECS instance in the cluster, especially for large clusters in a virtual private cloud (VPC).
Is log collector bandwidth billed?
No. Log collectors use internal bandwidth, which Alibaba Cloud does not bill.
Is EDAS Agent required on the same ECS instance?
No. However, install the log collector on an ECS instance that already has EDAS Agent installed.
What stops working without a log collector?
Without a log collector, EDAS cannot collect data. Services related to views and traces become unavailable, including:
Infrastructure monitoring
Service monitoring
Alerting
Tracing
Scaling
These features remain unavailable until a log collector is installed and running.
The installation shows "setup sproxy failed"
This message does not indicate a failed installation. The installation script checks for a connection before the sproxy module finishes starting, which causes the timing mismatch.
Resolution:
Wait one minute after installation completes.
Check whether port 8002 has been set up:
netstat -antp | grep 8002
Supported operating systems
Log collectors support the following 64-bit operating systems:
Operating system | Minimum version |
CentOS | 7.0 |
Alibaba Cloud Linux | 15.1 |
No trace or monitoring data in a VPC environment
Follow these steps to diagnose the issue:
Verify request traffic exists. Traces and monitoring data are generated only when the application receives requests. If no traffic reaches the application, no data appears in charts or dashboards.
Check that port 8182 is open on each ECS instance. Run the following command:
netstat -antp | grep 8182