Can't build workspaces, check for updates, due to tcp timeouts #20262

redjax · 2025-10-12T21:12:01Z

redjax
Oct 12, 2025

I am running Coder with Docker Compose on a machine on my local network. When I bring the stack up, it works, I can access the web UI, but when I try to create a template I see these errors in the container:

coder  | 2025-10-12 21:05:28.689 [info]  provisionerd-11d65d8b4af3-0: unpacking template source archive  session_id=558519f1-5b8b-4802-87e2-1da5bea8a1f1  size_bytes=10240
coder  | 2025-10-12 21:05:31.721 [info]  provisionerd-11d65d8b4af3-0: clean stale Terraform plugins  cache_path=/home/coder/.cache/coder/provisioner-0/tf
coder  | 2025-10-12 21:05:42.288 [erro]  coderd.update_checker: init failed ...
coder  |     error= update check failed:
coder  |                github.com/coder/coder/v2/coderd/updatecheck.(*Checker).init
coder  |                    /home/runner/work/coder/coder/coderd/updatecheck/updatecheck.go:123
coder  |              - client do:
coder  |                github.com/coder/coder/v2/coderd/updatecheck.(*Checker).update
coder  |                    /home/runner/work/coder/coder/coderd/updatecheck/updatecheck.go:186
coder  |              - Get "https://api.github.com/repos/coder/coder/releases/latest": dial tcp: lookup api.github.com on 127.0.0.11:53: read udp 127.0.0.1:59501->127.0.0.11:53: i/o timeout
coder  | 2025-10-12 21:05:51.752 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="Error: Error accessing remote module registry"
coder  | 2025-10-12 21:05:51.752 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="  on main.tf line 125:"
coder  | 2025-10-12 21:05:51.752 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output=" 125: module \"code-server\" {"
coder  | 2025-10-12 21:05:51.752 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="Failed to retrieve available versions for module \"code-server\" (main.tf:125)"
coder  | 2025-10-12 21:05:51.752 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="from registry.coder.com: failed to request discovery document: Get"
coder  | 2025-10-12 21:05:51.752 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="\"https://registry.coder.com/.well-known/terraform.json\": net/http: request"
coder  | 2025-10-12 21:05:51.752 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="canceled while waiting for connection (Client.Timeout exceeded while awaiting"
coder  | 2025-10-12 21:05:51.752 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output=headers).
coder  | 2025-10-12 21:05:51.753 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="Error: Error accessing remote module registry"
coder  | 2025-10-12 21:05:51.753 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="  on main.tf line 137:"
coder  | 2025-10-12 21:05:51.753 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output=" 137: module \"jetbrains\" {"
coder  | 2025-10-12 21:05:51.753 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="Failed to retrieve available versions for module \"jetbrains\" (main.tf:137)"
coder  | 2025-10-12 21:05:51.753 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="from registry.coder.com: failed to request discovery document: Get"
coder  | 2025-10-12 21:05:51.753 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="\"https://registry.coder.com/.well-known/terraform.json\": dial tcp: lookup"
coder  | 2025-10-12 21:05:51.753 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="registry.coder.com on 127.0.0.11:53: read udp 127.0.0.1:48380->127.0.0.11:53:"
coder  | 2025-10-12 21:05:51.753 [erro]  provisionerd-11d65d8b4af3-0.runner: template import provision job logged  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  level=ERROR  output="i/o timeout."
coder  | 2025-10-12 21:05:51.754 [info]  provisionerd-11d65d8b4af3-0.runner: dry-run provision failure  job_id=c280e0d3-792b-43f6-a110-4fc77f166e47  error="initialize terraform: exit status 1"
coder  | 2025-10-12 21:05:51.758 [info]  provisionerd-11d65d8b4af3-0: recv done on Session  session_id=558519f1-5b8b-4802-87e2-1da5bea8a1f1
coder  | 2025-10-12 21:05:53.159 [warn]  coderd: GET  host=coder.mydomain.com  path=/api/v2/debug/health  proto=HTTP/1.1  remote_addr=172.20.0.1  start="2025-10-12T21:05:23.155975226Z"  response_body="{\"message\":\"Healthcheck is in progress and did not complete in time. Try again in a few seconds.\"}\n"  requestor_id=22259539-8408-4053-823f-3505071d2550  requestor_name=jackenyon  requestor_email=jackenyon@gmail.com  took=30.003968557s  status_code=503  latency_ms=30003  request_id=bebe173a-0fef-4a2c-b0d4-eb056f56f9db

And I see these Terraform errors in the web UI as it tries to build the template:

Initializing the backend...
Initializing modules...
Error: Error accessing remote module registry
  on main.tf line 125:
 125: module "code-server" {
Failed to retrieve available versions for module "code-server" (main.tf:125)
from registry.coder.com: failed to request discovery document: Get
"https://registry.coder.com/.well-known/terraform.json": net/http: request
canceled while waiting for connection (Client.Timeout exceeded while awaiting
headers).
Error: Error accessing remote module registry
  on main.tf line 137:
 137: module "jetbrains" {
Failed to retrieve available versions for module "jetbrains" (main.tf:137)
from registry.coder.com: failed to request discovery document: Get
"https://registry.coder.com/.well-known/terraform.json": dial tcp: lookup
registry.coder.com on 127.0.0.11:53: read udp 127.0.0.1:48380->127.0.0.11:53:
i/o timeout.

I am able to ping/cURL both of these URLs from the host, but they fail inside the container.

Here is my compose.yml:

---
networks:
  coder_net: {}

volumes:
  coder_data:
  dind_storage:

services:
  docker-in-docker:
    image: docker:dind
    container_name: coder-docker-in-docker
    privileged: true
    volumes:
      - ${DOCKER_IN_DOCKER_DATA_DIR:-dind_storage}:/var/lib/docker
    networks:
      coder_net:
    expose:
      - 2375
    command: ["dockerd", "--host=tcp://0.0.0.0:2375"]
    healthcheck:
      test: ["CMD", "nc", "-z", "localhost", "2375"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 20s

  coder:
    # This MUST be stable for our documentation and
    # other automations.
    image: ghcr.io/coder/coder:${CODER_VERSION:-latest}
    container_name: coder
    ports:
      - ${CODER_HTTP_PORT:-7080}:7080
    environment:
      ## For Docker-in-Docker
      DOCKER_HOST: tcp://docker-in-docker:2375
      CODER_PG_CONNECTION_URL: "postgresql://${POSTGRES_USER:-coder}:${POSTGRES_PASSWORD:-coder}@database/${POSTGRES_DB:-coder}?sslmode=disable"
      CODER_HTTP_ADDRESS: "0.0.0.0:${CODER_HTTP_PORT:-7080}"
      # You'll need to set CODER_ACCESS_URL to an IP or domain
      # that workspaces can reach. This cannot be localhost
      # or 127.0.0.1 for non-Docker templates!
      CODER_ACCESS_URL: "${CODER_ACCESS_URL}"
    # If the coder user does not have write permissions on
    # the docker socket, you can uncomment the following
    # lines and set the group ID to one that has write
    # permissions on the docker socket.
    group_add:
      - "${DOCKER_GID:-999}" # docker group on host
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    depends_on:
      database:
        condition: service_healthy
      docker-in-docker:
        condition: service_healthy
    networks:
      - coder_net

  database:
    image: "postgres:${POSTGRES_IMG_VERSION:-14.2}"
    container_name: coder-db
    # ports:
    #   - ${POSTGRES_PORT:-5432}:5432
    environment:
      POSTGRES_USER: ${POSTGRES_USER:-coder}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-coder}
      POSTGRES_DB: ${POSTGRES_DB:-coder}
    volumes:
      ## Use "docker volume rm coder_coder_data" to reset Coder
      - ${CODER_DATA_DIR:-coder_data}:/var/lib/postgresql/data
    healthcheck:
      test:
        [
          "CMD-SHELL",
          "pg_isready -U ${POSTGRES_USER:-coder} -d ${POSTGRES_DB:-coder}",
        ]
      interval: 5s
      timeout: 5s
      retries: 5
    networks:
      - coder_net

In my .env file, I've set the Docker group (995 according to getent group docker | cut -d: -f3), and I've set the CODER_ACCESS_URL to https://coder.mydomain.com and http://192.168.1.7:7080 to test both, with the same results both times.

I've tried adding DNS to the containers, using host networking for the Coder container (this breaks connectivity to the database and DinD containers), setting my /etc/docker/daemon.json to:

{
  "dns": ["8.8.8.8", "1.1.1.1"]
}

And none of this is working. For some reason I cannot create workspaces or templates in Coder.

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Can't build workspaces, check for updates, due to tcp timeouts #20262

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Can't build workspaces, check for updates, due to tcp timeouts #20262

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redjax Oct 12, 2025

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redjax
Oct 12, 2025