To troubleshoot the issue of your Container App being inaccessible within the same VNet, let’s go through a few key points and potential issues:
Ingress and Traffic Settings • Ingress Traffic Configuration: You’ve mentioned that ingress traffic is set to “Accept traffic from anywhere.” This setting might allow public access, but since you’ve disabled public network access, it should default to internal. • Target Port: Ensure that the container inside your app is indeed listening on port 80 and that the application is properly binding to this port.
VNet and Subnet Configuration • VNet and Subnet: You’ve correctly assigned your container app to the me-dev VNet and someSubnet. Make sure the subnet is properly configured and not overlapping with other VNets/subnets that could cause routing issues. • Subnet IP Range: Ensure no IP address conflicts and that the subnet range (10.0.0.0/16) is correctly defined and large enough to accommodate the resources.
Private Endpoint and DNS • Private Endpoint: Since you have enabled a private endpoint, verify that the private endpoint is correctly configured and associated with the correct VNet (sql-dev). • DNS Configuration: Ensure the Azure Private DNS Zone is properly set up, and the VM in the same VNet is correctly resolving the DNS name of the Container App to its private IP address.
VM Connectivity • VM Configuration: The VM trying to access the Container App should be in the same VNet or have proper VNet peering with the me-dev VNet. • Network Security Groups (NSG): Check the NSGs associated with the subnet and VM to ensure there are no rules blocking the traffic to the Container App’s IP and port. • Routing Table: Ensure there are no custom route tables that might interfere with the traffic flow within the VNet.
Firewall and Security Settings • Firewall Rules: Ensure no firewall rules are blocking internal traffic to the Container App. • Application Gateway or WAF: If using an Application Gateway or WAF, ensure it’s properly configured to forward traffic to the Container App.
Diagnostics and Logs • Container App Logs: Check the logs for the Container App to see if any errors or connection attempts are being rejected. • Network Watcher: Use Azure Network Watcher to check connectivity and diagnose issues within your VNet.
Testing Steps • Ping and Telnet: From the VM, try pinging the private IP or DNS of the Container App. Use telnet to test connectivity on port 80. • Curl or Browser Test: Use curl or a web browser from the VM to check if the service is responding on port 80.
By following these steps and checking the mentioned configurations, you should be able to pinpoint the issue and resolve the connectivity problem. If the issue persists, more detailed logs or diagnostic tools might be necessary to further investigate.