vRA services health check failed. For more information, see Services page

Though all services on my vRealize Automation node are showing up as "REGISTERED",

I would see an exception stating "vRA services health check failed. For more information, see Services page"

There was a vRA hardening which was done and post that this issue was seen

This is the script inside an appliance responsible for the above exception

/opt/vmware/share/htdocs/service/café/utils.py

This the code responsible

def vra_healthcheck():
    url = 'http://127.0.0.1:8082/vcac/services/api/health'
    code = 0
    try:
        request = urllib2.Request(url)
        response = urllib2.urlopen(request)
        code = response.getcode()
    except urllib2.HTTPError as e:
        code = e.code
    except urllib2.URLError as e:
        pass
 
    return True if code >= 200 and code < 300 else False

When this issue is seen if you just execute a curl to check the health of services, it would return an exception stating the combination of host and port requires TLS.

curl -kv http://127.0.0.1:8082/vcac/services/api/health
 * Expire in 0 ms for 6 (transfer 0x2595030)
 *   Trying 127.0.0.1...
 * TCP_NODELAY set
 * Expire in 200 ms for 4 (transfer 0x2595030)
 * Connected to 127.0.0.1 (127.0.0.1) port 8082 (#0)
 > GET /vcac/services/api/health HTTP/1.1
 > Host: 127.0.0.1:8082
 > User-Agent: curl/7.64.0-DEV
 > Accept: */*
 >
 < HTTP/1.1 400
 < Content-Type: text/plain;charset=ISO-8859-1
 < Connection: close
 <
 Bad Request
 This combination of host and port requires TLS.
 * Closing connection 0

To fix this issue we have to change the code in the above mentioned script as follows

Script Path

/opt/vmware/share/htdocs/service/café/utils.py

def vra_healthcheck():
    url = 'https://127.0.0.1:8082/vcac/services/api/health'
    code = 0
    try:
        request = urllib2.Request(url)
        response = urllib2.urlopen(request)
        code = response.getcode()
    except urllib2.HTTPError as e:
        code = e.code
    except urllib2.URLError as e:
        pass
 
    return True if code >= 200 and code < 300 else False

So your just change the URLsection from HTTP to HTTPS, the exception seen in the UI is gone