Based on the ds_agent.log, the agent was not able to report its AWS instance metadata because it cannot connect to IP address 169.254.169.254.

2019-09-05 15:32:59.000000 [+0800]: [Error/1] | couldn't connect to 169.254.169.254:80 (10060: select socket (error 0x274c: a connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.)) | http\HTTPClient.cpp:269:DsaCore::CHTTPClient::ConnectToHost | 1BE8:11A8:dsa.Scheduler_0001
2019-09-05 15:32:59.673193 [+0800]: [Cmd/5] | failed to http get: http://169.254.169.254/latest/meta-data/network/interfaces/macs/ | common\CloudEnvInfo.cpp:153:DsaCore::HttpGet | 1BE8:11A8:dsa.Scheduler_0001
2019-09-05 15:32:59.674122 [+0800]: [Cmd/5] | Failed to query http://169.254.169.254/latest/meta-data/network/interfaces/macs/ | common\CloudEnvInfo.cpp:205:DsaCore::DetectAWSWSAgent | 1BE8:11A8:dsa.Scheduler_0001
2019-09-05 15:32:59.674122 [+0800]: [Cmd/5] | This is not an AWS workspace | common\CloudEnvInfo.cpp:269:DsaCore::DetectAWSWSAgent | 1BE8:11A8:dsa.Scheduler_0001
2019-09-05 15:33:20.676336 [+0800]: [Cmd/5] | failed to query meta-data/instance-id | common\CloudEnvInfo.cpp:906:DsaCore::HandleEC2Prop | 1BE8:11A8:dsa.Scheduler_0001

Since it cannot query the AWS metadata, the agent assumed that the machine is not in AWS. For more information, please refer to this AWS article: Retrieving Instance Metadata.

To resolve the issue, run the following command to fix the communication to IP address 169.254.169.254 on Port 80.

curl http://169.254.169.254/latest/meta-data/

GET http://169.254.169.254/latest/meta-data/