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Diagnose Docker Desktop and WSL problems by finding the failing layer first: WSL or Windows, Docker Desktop, the Docker daemon, one container, or a specific network path. Check whether Docker Desktop opens, whether docker info responds, whether all containers are affected, and whether the problem is DNS, outbound access, host or peer access, or a published port. The right fix depends on those details—not on resetting Docker by default.
Start with the failure layer
Before changing settings, record the exact error and answer these questions. They determine which troubleshooting branch is relevant.
- Does WSL start, and does Docker Desktop open?
- Does
docker inforeturn server information, or report that it cannot connect? - Does the problem affect every container or only one?
- Is the failure about resolving a name, reaching the internet, connecting to the Windows host or another service, or publishing a port?
- Which WSL and Docker Desktop versions are installed, and is WSL using NAT or mirrored networking?
- Are a VPN, enterprise firewall, IPv6 restrictions, or custom WSL settings involved?
Check WSL 2 and Docker Desktop integration
-
In PowerShell, run
wsl.exe -l -v. Confirm that the Linux distribution you use with Docker is running as WSL 2. -
In Docker Desktop, open Settings > Resources > WSL Integration and enable integration for that distribution. Docker configures this integration per distribution. See Docker Desktop WSL 2 backend on Windows.
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If the WSL Integration setting is unavailable, check whether Docker Desktop is in Windows-container mode. Switch to Linux containers if your workload requires Linux containers.
-
Check whether you installed Docker Engine or its CLI directly inside the WSL distribution as well as Docker Desktop. Docker warns that this combination can cause conflicts. Remove the duplicate installation only if you do not intentionally use it as a separate Docker setup.
Update WSL and check virtualization prerequisites
Docker recommends WSL 2.1.5 as the minimum for Docker Desktop to work as expected. Enhanced Container Isolation requires WSL 2.6 or later. These are technical version thresholds, not guarantees that a particular failure will be fixed by upgrading. Check Docker’s WSL 2 best practices for current compatibility guidance.
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If WSL commands fail or Docker Desktop reports an HCS or virtualization error, check that WSL 2 and Virtual Machine Platform are enabled, hardware virtualization is enabled in BIOS/UEFI, and the hypervisor is enabled at Windows startup. Docker also notes that a virtual machine may need nested virtualization enabled. Its Docker Desktop troubleshooting topics cover startup and virtualization problems.
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An error saying the Docker CLI cannot connect to the daemon points first to Docker availability or the CLI’s selected Docker host—not to a problem inside a particular container. Docker identifies two common causes: the daemon is not running, or the CLI is targeting another unreachable Docker host.
-
Check that Docker Desktop is running and has finished starting.
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Run
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If only one container will not start
When docker info works and other containers run, focus on the failing container’s state and configuration. Use the Docker CLI to collect:
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docker ps -ato see whether the container exited or is repeatedly restarting.docker inspect <container>to examine its state, entrypoint, environment, mounts, and other configuration.docker logs <container>to read the application’s output.
Replace <container> with its name or ID. Match the error or exit state to the container’s command, required environment variables, mounted files, and resource needs. Microsoft’s WSL container overview documents the inspect-and-logs diagnostic pattern; these examples use the Docker CLI for Docker Desktop: Get started with containers on WSL.
If a container starts but cannot connect
Identify the exact network path that fails before changing DNS or networking mode. WSL networking settings, Docker Desktop networking, VPNs, and firewall policy can affect different paths in different ways.
DNS resolution fails
First establish that the container cannot resolve a name, rather than merely being unable to connect to the resolved address. WSL DNS tunneling can help WSL distributions work with certain VPN and firewall configurations, but it is not a universal Docker-container DNS fix: Docker-managed container DNS queries bypass WSL DNS tunneling. Microsoft’s WSL troubleshooting guide explains DNS tunneling and its VPN context.
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Outbound access fails
Check whether Windows itself can reach the destination, then consider VPN and firewall policy, the active WSL networking mode, and relevant .wslconfig settings. Microsoft notes that enterprise firewall policy that disables local rule merging can block WSL networking. Its troubleshooting guide also discusses possible failures when IPv6 is disabled; do not change firewall or IPv6 policy without confirming it applies to your environment.
Access to the Windows host or another service fails
Distinguish a connection from a container to a service on the Windows host from container-to-container communication. The host name or address and behavior can depend on the active networking mode. Microsoft’s guide to accessing network applications with WSL describes WSL networking modes and host access. If the target is another container, also check that the containers’ Docker networks and the service’s listening address allow that connection.
A published port fails with mirrored networking
Microsoft documents a specific known issue: Docker Desktop containers using published ports through --publish or -p may fail to be created when WSL 2 mirrored networking is enabled under the default networking namespace. For this configuration and symptom, Microsoft lists two workarounds: run the container with --network host, or add the published port to WSL’s experimental ignoredPorts setting. These are targeted workarounds, not general fixes for unrelated container or connectivity failures. See the WSL troubleshooting guide for the documented issue and details.
Microsoft separately notes that containers with Network Manager running can fail loopback connections to the host, and recommends disabling that service for WSL networking. Consider this only when the symptom and container configuration match.
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Before changing network mode, firewall rules, or WSL configuration, save the exact error and relevant command output or logs. If you need a reversible diagnostic restart, run wsl --shutdown from PowerShell, then start the distribution and Docker Desktop again. Do not begin by pruning images, deleting volumes, or unregistering a distribution: destructive cleanup is not a first-line fix for a connectivity problem.
Quick Recap
Choose the next step from the symptom
| Observed symptom | First place to investigate |
|---|---|
| WSL commands fail or Docker Desktop reports a virtualization/HCS error | WSL and Windows virtualization prerequisites |
Docker Desktop starts, but docker info cannot reach a server |
Daemon startup and the CLI’s selected Docker host |
docker info works, but one container exits |
That container’s state, logs, entrypoint, environment, mounts, and resource needs |
| Containers run, but name resolution or outbound access fails | Separate DNS from routing; examine Docker/WSL networking, VPN, and firewall policy |
| Published-port container creation fails with mirrored networking | Confirm the documented WSL mirrored-networking issue before applying its targeted workaround |
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