73 lines
5.3 KiB
Markdown
73 lines
5.3 KiB
Markdown
# Session Handoff: Appwrite Function DNS Fix
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**Date:** 2026-03-15
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**Session Duration:** ~1.5 hours
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**Session Focus:** Diagnosed and fixed curl error 6 in Appwrite function executor caused by Docker inheriting host search domain
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**Context Usage at Handoff:** ~60%
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## What Was Accomplished
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1. Diagnosed SMTP auth failure in `appwrite-worker-mails` — deferred (credentials/provider issue, not automation)
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2. Diagnosed `userinfo` function curl error 6 (CURLE_COULDNT_RESOLVE_HOST) in `openruntimes-executor`
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3. Identified `_APP_EXECUTOR_RUNTIME_NETWORK` mismatch (`appwrite_runtimes` vs actual Docker network `runtimes`) → fixed in env template default
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4. Traced root cause to `search mgmt.toal.ca` in container resolv.conf inherited from host → fixed by shortening system hostname from `bab1.mgmt.toal.ca` to `bab1`
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5. Added pre-flight assertions to `install_appwrite.yml` to prevent recurrence
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6. Cleaned up ineffective `daemon.json` task added and removed this session
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## Exact State of Work in Progress
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- SMTP authentication failure (`appwrite-worker-mails`): NOT investigated. Separate issue from DNS fix. Deferred.
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- All DNS/function work: COMPLETE. `userinfo` function confirmed working after hostname change.
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## Decisions Made This Session
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- `_APP_EXECUTOR_RUNTIME_NETWORK` default corrected to `runtimes` BECAUSE the Appwrite docker-compose creates a network named `runtimes` (prefixed by compose project `appwrite`→`appwrite_runtimes`... actually the network is literally named `runtimes` not `appwrite_runtimes`) — STATUS: confirmed, deployed to host
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- Docker `daemon.json` `"dns-search": []` REJECTED BECAUSE Docker treats empty array as no-op (`# Overrides: []` in container resolv.conf confirms it had no effect)
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- System hostname shortened to `bab1` BECAUSE FQDN hostname causes NetworkManager to write `search mgmt.toal.ca` into `/etc/resolv.conf`, which Docker inherits into all containers — STATUS: confirmed fix, function working
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## Key Numbers Generated or Discovered This Session
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- Runtime container IP on `runtimes` network: `172.20.0.3`
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- Executor IP on `runtimes` network: `172.20.0.2`
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- Executor IP on `appwrite` network: `172.19.0.5`
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- openruntimes executor image: `openruntimes/executor:0.7.22`
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- Appwrite version in `install_appwrite.yml`: `1.8.1`
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- Docker.php error line: 1161 — curl call to `http://{random_32_hex}:3000/`
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- Runtime hostname format: `bin2hex(random_bytes(16))` = 32-char hex, e.g. `c6991893fe570ce5c669d50ed6e7a985`
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## Conditional Logic Established
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- IF system hostname is FQDN (contains `.`) THEN NetworkManager writes `search <domain>` to `/etc/resolv.conf` AND Docker inherits it into all containers AND Appwrite executor curl calls to runtime containers fail with error 6 BECAUSE musl resolver appends search domain to unqualified names and does not fall back on SERVFAIL
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- IF `ping {hostname}` resolves but `curl http://{hostname}/` returns error 6 THEN suspect c-ares or `/etc/hosts` vs DNS split — trailing dot in URL (`curl http://{hostname}.:port/`) is a reliable test for whether Docker's embedded DNS has the record
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- IF `_APP_EXECUTOR_RUNTIME_NETWORK` does not match the actual Docker network name the executor is connected to THEN runtime containers are placed on a different network than the executor and communication fails with error 6
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## Files Created or Modified
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| File Path | Action | Description |
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|-----------|--------|-------------|
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| `playbooks/templates/appwrite.env.j2` | Modified | `_APP_EXECUTOR_RUNTIME_NETWORK`, `OPEN_RUNTIMES_NETWORK`, `_APP_FUNCTIONS_RUNTIMES_NETWORK`, `_APP_COMPUTE_RUNTIMES_NETWORK` defaults changed from `appwrite_runtimes` to `runtimes` |
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| `playbooks/install_appwrite.yml` | Modified | Added pre-flight assertions: hostname must not be FQDN, `/etc/resolv.conf` must have no `search` line. Added explanatory comment block citing the executor curl error 6 failure mode. |
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## What the NEXT Session Should Do
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1. **First**: Read this handoff
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2. **If SMTP is the goal**: Check `vault_appwrite_smtp_password` value and `appwrite_smtp_username` format against the SMTP provider. The template at `playbooks/templates/appwrite.env.j2` lines 74-78 is correct structurally. The issue is likely credentials or `_APP_SMTP_SECURE` value (`true` string vs `tls`/empty).
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3. **If function work continues**: The `userinfo` function and DNS are working. Next functional gap is unknown — check Appwrite function logs directly.
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## Open Questions Requiring User Input
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- [ ] SMTP failure (`appwrite-worker-mails` SMTP Error: Could not authenticate) — what provider and were credentials recently rotated? Impacts email delivery for all Appwrite auth flows.
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## Assumptions That Need Validation
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- ASSUMED: Shortening the hostname to `bab1` has no negative side effects on other services on this host (Nginx, AAP connectivity, TLS certs) — validate by checking that `bab1.mgmt.toal.ca` still resolves externally and TLS certs are not hostname-bound to the FQDN system hostname.
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## What NOT to Re-Read
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- `docs/summaries/handoff-2026-03-14-appwrite-bootstrap-backup.md` — archived, superseded by this handoff
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## Files to Load Next Session
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- `playbooks/templates/appwrite.env.j2` — if working on SMTP or any env configuration
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- `playbooks/install_appwrite.yml` — if adding further host setup tasks
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- `docs/context/architecture.md` — if working on playbooks or EDA rulebooks
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