Migration - unable to connect to cloud

[RobinQuetin]

Confluence Server version: 7.13.5 (Docker)

I am stuck in the step 'Prepare your apps' where I need to connect my cloud site in the migration process. I am following the next steps:

1. Go to 'General configuration' > 'Migration assistent' on the Confluence Server instance
2. Complete the step 'Assess your apps'
3. Start the step 'Prepare your apps'
4. Click the button 'Choose cloud site'
5. In the dialog 'Choose your cloud destination' click 'Continue' to redirect to the Atlassian migration website
   1. Migrate from: xxx.mydomain.tld
   2. Migrate to: yyy.atlassian.net
   3. Check option 'Allow Atlassian to access migrations data'
   4. Click button 'Confirm'
6. (Atlassian website redirects to my Confluence Server)
7. The first page of the 'Prepare your apps' step is shown again (/admin/migration.action?&#apps/connect-to-cloud?cloudId=), but with no options to choose from (see image below)

The same thing occurs when I try to skip the step 'Prepare your apps' and proceed with the step 'Migrate your data', since it requires the same information.

I suspect that this has something to do with my setup. I am running Confluence using Docker and I use a Nginx as reverse proxy to make the Confluence instance available through a subdomain without base path (e.g., https://confluence.mydomain.tld). For the Docker container, I use the following command:

docker run --rm \
  -v $CONFLUENCE_DATA:/var/atlassian/application-data/confluence \
  -v /etc/timezone:/etc/timezone:ro \
  --name="confluence" \
  -e JVM_MINIMUM_MEMORY=$CONFLUENCE_MEM \
  -e JVM_MAXIMUM_MEMORY=$CONFLUENCE_MEM \
  -e CATALINA_CONNECTOR_PROXYNAME=$CONFLUENCE_HOST \
  -e CATALINA_CONNECTOR_PROXYPORT=443 \
  -e CATALINA_CONNECTOR_SCHEME=https \
  -e CATALINA_CONNECTOR_SECURE=true \
  -p 127.0.0.1:8090:8090 \
  -p 127.0.0.1:8091:8091 \
  atlassian/confluence-server:$CONFLUENCE_VERSION

The proxy config in Nginx was configured based on https://confluence.atlassian.com/doc/running-confluence-behind-nginx-with-ssl-858772080.html and looks as follows:

server {
  listen 443 ssl http2;

  root /var/www/html/confluence.mydomain.tld;
  index index.html index.htm;
  server_name confluence.mydomain.tld;

  # Security options
  ssl_certificate /etc/letsencrypt/live/confluence.mydomain.tld/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/confluence.mydomain.tld/privkey.pem;
  include "/etc/nginx/conf.d/ssl-options.conf";

  access_log /var/log/nginx/confluence.mydomain.tld/access.log;
  error_log /var/log/nginx/confluence.mydomain.tld/error.log;

  location /synchrony {
    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header X-Forwarded-Server $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_pass http://localhost:8091/synchrony;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "Upgrade";
  }

  location / {
    client_max_body_size 100m;
    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header X-Forwarded-Server $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_pass http://localhost:8090;
    proxy_connect_timeout 600;
    proxy_send_timeout 600;
    proxy_read_timeout 600;
    send_timeout 600;
  }
}

Is there something that I am doing wrong?

[Shannon S]

Hello Robin,

Good afternoon, and thank you for raising this on Atlassian Community. I understand you're having difficulty migrating from Confluence Server on a Docker container to Cloud.

First, you'll want to ensure that the IPs and domains that Cloud requires are accessible by your network. You may need to add these to your allowlist. Refer to IP addresses and domains for Atlassian Cloud products for that list.

Secondly, you will need to verify the incoming and outgoing connections to find the root cause. Verify your Docker node can reach Atlassian Cloud URLs using https://bitbucket.org/atlassianlabs/httpclienttest/src/master/ or 

Unable to Connect to SSL Services Due to PKIX Path Building Failed error.

If you continue to have any difficulty, I can raise a ticket on your behalf with the Confluence Server team, so keep me updated!

Take care,

Shannon | Atlassian Community Support