Edge API fails with error message "Error proxying request"

Products

• VMware NSX

Issue/Introduction

API uri using /node errors out with message "Error proxying request to: ####0bb4-####-11ea-####-b859########."

https://<nsx-manager>/api/v1/transport-nodes/<edge-id>/node

above api returns the below error.

 

{

    "error_code": 36580,

    "error_message": "Error proxying request to: ####0bb4-####-11ea-####-b859########.",

    "module_name": "node-services"

}

 

Environment

VMware NSX

Cause

Indirect curl request made for CentralAPI on edge node is unable to connect to localhost over port 7441, which serves Node API server.
curl: (7) Failed to connect to localhost port 7441: Connection refused

Resolution

 

Validate the hosts file to make sure there is an entry for localhost with ip 127.0.0.1 to handle the Central API request over port 7441.

Non-working output of  /etc/hosts file:

 

127.0.0.1 edge01  ---------------------> It should be updated as "localhost"

10.#.160.# edge01

 

# The following lines are desirable for IPv6 capable hosts

::1 localhost ip6-localhost ip6-loopback

ff02::1 ip6-allnodes

ff02::2 ip6-allrouters

Workaround:

On Edge cli, root mode.

cat /etc/hosts

 

127.0.0.1 localhost --------------------> Updated

10.#.160.# edge01

 

# The following lines are desirable for IPv6 capable hosts

::1 localhost ip6-localhost ip6-loopback

ff02::1 ip6-allnodes

ff02::2 ip6-allrouters

 

Additional Information

Logs to validate:
 

From edge node, var/log/syslog:

 

2024-09-17T13:29:02.567Z edge01 NSX 1667 - [nsx@6876 comp="nsx-edge" subcomp="mpa-client" tid="1694" level="INFO"] [PlatformManagement] MpaClientHostService Received: Msg type (com.vmware.nsx.platform_management.CentralApiRequestMsg)corelationId (f13d####-5f19-####-b67b-1af2######) from APH (ffa3####-95cb-####-b71c-9785########)

2024-09-17T13:29:02.567Z edge01 NSX 1667 - [nsx@6876 comp="nsx-edge" subcomp="platform-client" tid="1694" level="INFO"] [HandleMsg] Received Message from MPA [8]

2024-09-17T13:29:02.567Z edge01 NSX 1667 - [nsx@6876 comp="nsx-edge" subcomp="platform-client" tid="1694" level="INFO"] Unhandled BSON Type [0]

2024-09-17T13:29:02.567Z edge01 NSX 1667 - [nsx@6876 comp="nsx-edge" subcomp="platform-client" tid="1694" level="INFO"] ProcessReceiveMessages: correlationId: f13d####-5f19-####-b67b-1af2######

2024-09-17T13:29:02.567Z edge01 NSX 1667 - [nsx@6876 comp="nsx-edge" subcomp="platform-client" tid="1694" level="INFO"] Typeid:com.vmware.nsx.platform_management.CentralApiRequestMsg

2024-09-17T13:29:02.590Z edge01 NSX 1667 - [nsx@6876 comp="nsx-edge" subcomp="platform-client" tid="1694" level="ERROR" errorCode="MPA80012"] [ProcessApiRequest] error invoke central api request, rc:7, output:, error:curl: (7) Failed to connect to localhost port 7441: Connection refused