error : domain is already mapped to a project in google cloud platform

Question

i am having issue with mapping domain in google cloud platform so i have just verified my domain but then i am having this issue

but the thing is that i have not a

Answer 1

As of 2018, the command line requests alone didn't work for me. What worked for me were these instructions from the Google Group here. In short,

1. Head over to the API Explorer.

2. Fill out the form in this format below:

3. Make sure you Enable OAuth and execute the request.

4. If successful, you'll see a response like this below:

   200
   
   - Show headers -
   
   {
    "name": "apps/example/operations/abcde-efgh-ijkl-mnop
    "metadata": {
     "@type": "type.googleapis.com/google.appengine.v1.OperationMetadataV1",
     "method": "google.appengine.v1.DomainMappings.CreateDomainMapping",
     "insertTime": "2018-03-16T03:44:49.167Z",
     "user": "you@example.com",
     "target": "apps/example/domainMappings/example.com"
    }
   }
   

   Important note: You need to run this request TWICE - Once for your domain without www (example.com). And once with www (www.example.com). I missed this step and my app stop serving www.example.com.

5. To (re)-enable SSL support: Go back to your cloud console and then AppEngine domain settings and click the "Enable Managed Security" button as shown below:

6. If it still doesn't work, you can delete the domain from your console and re-add it through the command line using the command below:

   gcloud beta app domain-mappings create <domain name>
   

   Keep in mind, the above command will only work once you've run the request through the API explorer.

Hope this helps.

Cheers.

Answer 2

Easy steps:

1. try to map a domain with the following command: gcloud app domain-mappings create <domain>
2. and then you'll see something like: <your_domain> is currently mapped to application '<project>'.
3. and after you know which project use that domain, you can easily delete the mapped one with this command: gcloud --project <project_name> app domain-mappings delete <your_domain>

Answer 3

Try using gcloud command line tool instead of using web console. I was able to resolve through it. gcloud beta app domain-mappings create <domain name> Also, use of beta in the above command will add managed certificate for SSL automatically.