greenseeker•3mo ago

Windmill is a blank white screen

I've just set up Windmill in my lab using docker on Almalinux 9. When I point a browser at the VM, I just get a white screen. I've turned off firewalld and selinux for now, just to eliminate them as possibilities. I'm not seeing any errors in the windmill_windmill_server_1 or windmill_caddy_1 logs. How can I troubleshoot this?

6 Replies

rubenf•2mo ago

Hi, 1. Did you use the stock docker compose 2. Do you have logs about the server responding to requests ? If not then most likely the ingress is not setup properly and your requests are not reaching the server

greenseekerOP•2mo ago

1. I've tried both docker-compose and podman-compose now. 2. docker logs windmill_windmill_server_1 is just the following over and over again:

2025-06-23T13:21:55.825083Z  INFO src/main.rs:1070: monitor task started
2025-06-23T13:21:55.833199Z  INFO src/main.rs:1084: monitor task finished
2025-06-23T13:22:08.978181Z  INFO src/monitor.rs:503: 175.9504165649414 mb allocated/183.40234375 mb resident
2025-06-23T13:22:25.834724Z  INFO src/main.rs:1070: monitor task started
2025-06-23T13:22:25.859732Z  INFO src/main.rs:1084: monitor task finished
2025-06-23T13:22:38.980693Z  INFO src/monitor.rs:503: 175.95282745361328 mb allocated/183.4140625 mb resident

2025-06-23T13:21:55.825083Z  INFO src/main.rs:1070: monitor task started
2025-06-23T13:21:55.833199Z  INFO src/main.rs:1084: monitor task finished
2025-06-23T13:22:08.978181Z  INFO src/monitor.rs:503: 175.9504165649414 mb allocated/183.40234375 mb resident
2025-06-23T13:22:25.834724Z  INFO src/main.rs:1070: monitor task started
2025-06-23T13:22:25.859732Z  INFO src/main.rs:1084: monitor task finished
2025-06-23T13:22:38.980693Z  INFO src/monitor.rs:503: 175.95282745361328 mb allocated/183.4140625 mb resident

I did notice one additional thing that I missed previously. The caddy container keeps exiting. Its log looks like this:

Error: reading config from file: open /etc/caddy/Caddyfile: permission denied
Error: reading config from file: open /etc/caddy/Caddyfile: permission denied
Error: reading config from file: open /etc/caddy/Caddyfile: permission denied
Error: reading config from file: open /etc/caddy/Caddyfile: permission denied

Error: reading config from file: open /etc/caddy/Caddyfile: permission denied
Error: reading config from file: open /etc/caddy/Caddyfile: permission denied
Error: reading config from file: open /etc/caddy/Caddyfile: permission denied
Error: reading config from file: open /etc/caddy/Caddyfile: permission denied

I can't tell where on the local system the Caddyfile should be and the self-hosting instructions don't specify anything beyond downloading it. I've put docker-compose.yml, Caddyfile, and .env in /opt/windmill at the moment. All are world-readable.

rubenf•2mo ago

The server is not receiving any request and your issue come from Caddy and related to this Caddyfile which should be mounted and readable to caddy at that location

greenseekerOP•2mo ago

Resolved the permissions issue (selinux-related) and now have windmill_caddy_1 running normally. Unfortunately, windmill is still a blank white page.

# docker logs windmill_windmill_server_1
...
2025-06-24T02:50:10.556134Z  INFO src/main.rs:1229: config: MODE: server, GO_PATH: /usr/local/go/bin/go, PATH: /usr/local/bin:/root/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/go/bin, HOME: /root
2025-06-24T02:50:10.558276Z  WARN windmill-api/src/oauth2_ee.rs:181: oauth.json not found, no OAuth clients loaded
2025-06-24T02:50:10.567229Z  INFO windmill-common/src/worker.rs:473: Loaded setting custom_tags, common: ["chromium"], per-workspace: {}
2025-06-24T02:50:10.570753Z  WARN windmill-common/src/server.rs:81: SMTP not configured
2025-06-24T02:50:10.570848Z  INFO src/monitor.rs:1531: Reloading smtp config...
2025-06-24T02:50:10.571447Z  INFO src/monitor.rs:1263: Loaded saml_metadata setting to None
2025-06-24T02:50:10.571829Z  INFO src/monitor.rs:1263: Loaded scim_token setting to None
2025-06-24T02:50:10.574706Z  INFO src/monitor.rs:503: 6.5283050537109375 mb allocated/9.81640625 mb resident
2025-06-24T02:50:10.636969Z  INFO src/main.rs:1222: Successfully connected to pg listen
2025-06-24T02:50:10.637247Z  INFO windmill-api/src/embeddings.rs:223: Loading embedding model...
2025-06-24T02:50:10.637953Z  INFO windmill-api/src/embeddings.rs:197: Found embedding model in cache
2025-06-24T02:50:10.643815Z  INFO windmill-api/src/lib.rs:343: SMTP server not started because email domain is not set
2025-06-24T02:50:10.664562Z  INFO windmill-api/src/http_triggers.rs:919: Loaded HTTP routers
...

# docker logs windmill_windmill_server_1
...
2025-06-24T02:50:10.556134Z  INFO src/main.rs:1229: config: MODE: server, GO_PATH: /usr/local/go/bin/go, PATH: /usr/local/bin:/root/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/go/bin, HOME: /root
2025-06-24T02:50:10.558276Z  WARN windmill-api/src/oauth2_ee.rs:181: oauth.json not found, no OAuth clients loaded
2025-06-24T02:50:10.567229Z  INFO windmill-common/src/worker.rs:473: Loaded setting custom_tags, common: ["chromium"], per-workspace: {}
2025-06-24T02:50:10.570753Z  WARN windmill-common/src/server.rs:81: SMTP not configured
2025-06-24T02:50:10.570848Z  INFO src/monitor.rs:1531: Reloading smtp config...
2025-06-24T02:50:10.571447Z  INFO src/monitor.rs:1263: Loaded saml_metadata setting to None
2025-06-24T02:50:10.571829Z  INFO src/monitor.rs:1263: Loaded scim_token setting to None
2025-06-24T02:50:10.574706Z  INFO src/monitor.rs:503: 6.5283050537109375 mb allocated/9.81640625 mb resident
2025-06-24T02:50:10.636969Z  INFO src/main.rs:1222: Successfully connected to pg listen
2025-06-24T02:50:10.637247Z  INFO windmill-api/src/embeddings.rs:223: Loading embedding model...
2025-06-24T02:50:10.637953Z  INFO windmill-api/src/embeddings.rs:197: Found embedding model in cache
2025-06-24T02:50:10.643815Z  INFO windmill-api/src/lib.rs:343: SMTP server not started because email domain is not set
2025-06-24T02:50:10.664562Z  INFO windmill-api/src/http_triggers.rs:919: Loaded HTTP routers
...

...
2025-06-24T02:50:10.664914Z  INFO windmill-api/src/agent_workers_ee.rs:118: recv parallelism: 3
2025-06-24T02:50:10.679881Z  INFO windmill-api/src/lib.rs:802: server started on port=8000 and addr=0.0.0.0 instance=Rn09J
2025-06-24T02:50:10.876511Z  INFO windmill-api/src/embeddings.rs:239: Loaded embedding model
2025-06-24T02:50:10.876670Z  INFO windmill-api/src/embeddings.rs:629: Creating embeddings DB...
2025-06-24T02:50:20.294097Z  INFO windmill-api/src/embeddings.rs:636: Created embeddings DB
2025-06-24T02:50:40.576409Z  INFO src/monitor.rs:503: 175.60433959960938 mb allocated/244.625 mb resident
2025-06-24T02:50:40.638154Z  INFO src/main.rs:1070: monitor task started
2025-06-24T02:50:40.689100Z  INFO src/main.rs:1084: monitor task finished
...
2025-06-24T02:57:10.597012Z  INFO src/monitor.rs:503: 176.13587188720703 mb allocated/182.9453125 mb resident
2025-06-24T02:57:10.849548Z  INFO src/main.rs:1070: monitor task started
2025-06-24T02:57:10.859960Z  INFO src/main.rs:1084: monitor task finished

...
2025-06-24T02:50:10.664914Z  INFO windmill-api/src/agent_workers_ee.rs:118: recv parallelism: 3
2025-06-24T02:50:10.679881Z  INFO windmill-api/src/lib.rs:802: server started on port=8000 and addr=0.0.0.0 instance=Rn09J
2025-06-24T02:50:10.876511Z  INFO windmill-api/src/embeddings.rs:239: Loaded embedding model
2025-06-24T02:50:10.876670Z  INFO windmill-api/src/embeddings.rs:629: Creating embeddings DB...
2025-06-24T02:50:20.294097Z  INFO windmill-api/src/embeddings.rs:636: Created embeddings DB
2025-06-24T02:50:40.576409Z  INFO src/monitor.rs:503: 175.60433959960938 mb allocated/244.625 mb resident
2025-06-24T02:50:40.638154Z  INFO src/main.rs:1070: monitor task started
2025-06-24T02:50:40.689100Z  INFO src/main.rs:1084: monitor task finished
...
2025-06-24T02:57:10.597012Z  INFO src/monitor.rs:503: 176.13587188720703 mb allocated/182.9453125 mb resident
2025-06-24T02:57:10.849548Z  INFO src/main.rs:1070: monitor task started
2025-06-24T02:57:10.859960Z  INFO src/main.rs:1084: monitor task finished

rubenf•2mo ago

your server are not receiving the requests, likely still a caddy configuration issue

greenseekerOP•2mo ago

Finally figured this out. The variables in the included Caddyfile (BASE_URL and ADDRESS) weren't functional. I replaced them with the actual values and I'm up and running now.

Windmill is a blank white screen

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