Issue: Error: Cannot Connect to Docker Daemon in Coder App Workspace Setup #16926

Sam123ben · 2025-03-14T13:42:15Z

Sam123ben
Mar 14, 2025

Title: Error: Cannot Connect to Docker Daemon in Coder App Workspace Setup

Description:
I encountered an issue while deploying a workspace using the Coder app hosted on Kubernetes. I followed the provided instructions for hosting the Coder app on Kubernetes and proceeded to create a workspace using the quickstart guide. The issue arises regardless of whether I use a custom template or the existing Coder template. The Terraform process fails with the following error:

Terraform 1.10.5
data.coder_provisioner.me: Refreshing...
data.coder_workspace.me: Refreshing...
data.coder_workspace_owner.me: Refreshing...
data.coder_workspace.me: Refresh complete after 0s [id=ea82f3db-03a8-4aed-8712-2898b7a34079]
data.coder_workspace_owner.me: Refresh complete after 0s [id=fb36fd92-adef-46be-8707-769d2c506572]
data.coder_provisioner.me: Refresh complete after 0s [id=67d5185c-67d4-4910-91bb-fbd31384a88c]
coder_agent.main: Plan to create
coder_app.coder-server-doc: Plan to create
coder_app.code-server: Plan to create
Plan: 3 to add, 0 to change, 0 to destroy.

Error: Error pinging Docker server: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

on main.tf line 18, in provider "docker":
  18: provider "docker" {

Steps to Reproduce:

Follow the official Coder app documentation to deploy the app on a Kubernetes cluster.
Use the quickstart guide to attempt setting up a new workspace using either a custom template or the provided default Coder template.
Terraform reaches the step where it attempts to create Docker-based resources and fails with the above error.

Environment Details:

Kubernetes Version: [Specify your Kubernetes version]
Coder App Version: [Specify your Coder app version]
Terraform Version: 1.10.5
Operating System/Distribution: [Specify OS details if applicable]

Troubleshooting Steps Taken:

Verified the Kubernetes deployment status (pods are running successfully).
Ensured the Docker socket path is correctly mapped within the Kubernetes cluster.
Confirmed that the Docker daemon is running on the nodes.

Potential Cause:
It appears the Docker daemon is either not accessible within the workspace container or the socket path is misconfigured.

Suggested Resolution (if applicable):

Verify the Docker-in-Docker setup for the workspace container.
Ensure the Docker socket is correctly mounted in the workspace environment.
Check the permissions for the /var/run/docker.sock file.

Request for Assistance:
Please advise on how to resolve this error or if there are specific steps required to configure Docker access within the Coder workspace setup.

Thank you for your support!

kc get all
NAME READY STATUS RESTARTS AGE
pod/coder-588dd44f5f-gh7qq 1/1 Running 0 46m
pod/coder-db-postgresql-0 1/1 Running 0 46m
pod/dind-6895c45c99-66zc4 1/1 Running 0 14m

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/coder LoadBalancer 10.0.56.49 4.254.34.76 80:31587/TCP 46m
service/coder-db-postgresql ClusterIP 10.0.242.97 5432/TCP 46m
service/coder-db-postgresql-hl ClusterIP None 5432/TCP 46m

NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/coder 1/1 1 1 46m
deployment.apps/dind 1/1 1 1 14m

NAME DESIRED CURRENT READY AGE
replicaset.apps/coder-588dd44f5f 1 1 1 46m
replicaset.apps/dind-6895c45c99 1 1 1 14m

NAME READY AGE
statefulset.apps/coder-db-postgresql 1/1 46m

2025-03-14 13:35:44.218 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=INFO output="Terraform 1.10.5"
2025-03-14 13:35:44.512 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=INFO output="data.coder_provisioner.me: Refreshing..."
2025-03-14 13:35:44.512 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=INFO output="data.coder_workspace.me: Refreshing..."
2025-03-14 13:35:44.512 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=INFO output="data.coder_workspace_owner.me: Refreshing..."
2025-03-14 13:35:44.513 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=INFO output="data.coder_workspace.me: Refresh complete after 0s [id=ea82f3db-03a8-4aed-8712-2898b7a34079]"
2025-03-14 13:35:44.514 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=INFO output="data.coder_workspace_owner.me: Refresh complete after 0s [id=fb36fd92-adef-46be-8707-769d2c506572]"
2025-03-14 13:35:44.514 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=INFO output="data.coder_provisioner.me: Refresh complete after 0s [id=67d5185c-67d4-4910-91bb-fbd31384a88c]"
2025-03-14 13:35:44.527 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=INFO output="coder_agent.main: Plan to create"
2025-03-14 13:35:44.527 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=INFO output="coder_app.coder-server-doc: Plan to create"
2025-03-14 13:35:44.527 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=INFO output="coder_app.code-server: Plan to create"
2025-03-14 13:35:44.527 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=INFO output="Plan: 3 to add, 0 to change, 0 to destroy."
2025-03-14 13:35:44.528 [erro] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=ERROR output="Error: Error pinging Docker server: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?"
2025-03-14 13:35:44.528 [erro] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=ERROR output="on main.tf line 18, in provider "docker":"
2025-03-14 13:35:44.528 [erro] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=ERROR output=" 18: provider "docker" {"
2025-03-14 13:35:44.528 [erro] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=ERROR output=""
2025-03-14 13:35:44.528 [erro] provisionerd-coder-588dd44f5f-gh7qq-0.runner: template import provision job logged job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f level=ERROR output=""
2025-03-14 13:35:44.531 [info] provisionerd-coder-588dd44f5f-gh7qq-0.runner: dry-run provision failure job_id=a9ad78ba-56a4-41ef-bee0-07d2e853548f error="terraform plan: exit status 1

Sam123ben · 2025-03-14T13:42:48Z

Sam123ben
Mar 14, 2025
Author

0 replies

matifali · 2025-03-14T13:53:10Z

matifali
Mar 14, 2025
Maintainer

Hi @Sam123ben for kubetnetes the kubetnetes template is more suitable.
If you want to use the docker template you need to use a remote docker host.

0 replies

EdwardAngert · 2025-04-04T18:49:33Z

EdwardAngert
Apr 4, 2025
Collaborator

@Sam123ben , were you able to resolve the issue with the kubernetes template?

the error you're seeing looks very familiar - I got something similar while testing the Quickstart doc if I installed Coder before Docker or if I didn't successfully assign the user to the Docker group (steps 2 and 3 in the Install and start Coder section)

parts of the error are a little different, possibly based on the template you upload vs the one I chose:

Terraform 1.11.2
data.coder_provisioner.me: Refreshing...
data.coder_workspace_owner.me: Refreshing...
data.coder_workspace.me: Refreshing...
data.coder_workspace.me: Refresh complete after 0s [id=3cd81d76-68dd-48cc-9960-a804aad29797]
data.coder_workspace_owner.me: Refresh complete after 1s [id=656262cb-92b6-45bc-81a2-cb5ba599ce58]
data.coder_provisioner.me: Refresh complete after 1s [id=b0e27338-a2cb-4917-9389-e294efa6ec4a]
module.jetbrains_gateway[0].data.coder_workspace.me: Refreshing...
module.jetbrains_gateway[0].data.coder_parameter.jetbrains_ide: Refreshing...
module.jetbrains_gateway[0].data.coder_workspace_owner.me: Refreshing...
module.jetbrains_gateway[0].data.coder_workspace.me: Refresh complete after 0s [id=73dfadf3-a5a2-4bd6-9148-ef5e64cb8ad9]
module.jetbrains_gateway[0].data.coder_workspace_owner.me: Refresh complete after 0s [id=99d1724a-e5b7-4c2a-acf8-6505c9f5676b]
module.jetbrains_gateway[0].data.coder_parameter.jetbrains_ide: Refresh complete after 0s [id=739fcbbd-72df-4702-ac95-2b99c08a3d45]
coder_agent.main: Plan to create
module.code-server[0].coder_script.code-server: Plan to create
module.code-server[0].coder_app.code-server: Plan to create
module.jetbrains_gateway[0].coder_app.gateway: Plan to create
Plan: 4 to add, 0 to change, 0 to destroy.
+Error: Error pinging Docker server: Got permission denied while trying to connect to the Docker daemon socket at +unix:///var/run/docker.sock: Get "http://%2Fvar%2Frun%2Fdocker.sock/_ping": dial unix /var/run/docker.sock: connect: permission denied
+on main.tf line 22, in provider "docker":
+  22: provider "docker" {

let me know what worked - I'd love to update the documentation

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Issue: Error: Cannot Connect to Docker Daemon in Coder App Workspace Setup #16926

Sam123ben Mar 14, 2025

Replies: 3 comments

Sam123ben Mar 14, 2025 Author

matifali Mar 14, 2025 Maintainer

EdwardAngert Apr 4, 2025 Collaborator

Sam123ben
Mar 14, 2025

Sam123ben
Mar 14, 2025
Author

matifali
Mar 14, 2025
Maintainer

EdwardAngert
Apr 4, 2025
Collaborator