Upgrade to AlmaLinux 10 and fix WebSocket proxying

cloud-hosting-platform/cloud-node-container

Base image moves from AlmaLinux 9 to 10, which forces two related changes:
EPEL repo URL bumps to the el10 release RPM, and tini is replaced with
dumb-init as PID 1 since tini is not packaged in EPEL 10. Both provide the
signal forwarding and zombie reaping the wedged-container fix relies on.
Nginx 1.26 in AlmaLinux 10 deprecates the `listen ... http2` parameter, so
the server block now uses the separate `http2 on;` directive.

Also fixes three issues that affected WebSocket apps (socket.io, ws):

- `Connection: upgrade` was hardcoded on every proxied request, including
  ordinary HTTP. Now driven by a `map $http_upgrade $connection_upgrade`
  so only genuine upgrade requests carry it.
- No explicit proxy read/send timeout meant idle WebSockets were cut at
  nginx's 60s default. Set to 600s, which clears any sane heartbeat without
  pinning connection slots (worker_connections is 512, two per client).
- `large_client_header_buffers 2 1k` returned 400 for any single header
  line over 1KB, which session cookies and bearer tokens routinely exceed.
  Raised to the nginx default of 4 8k; buffers are allocated on demand, so
  this only costs memory for requests that need it.

Verified by rendering the generated config and running it under nginx with
a Node backend: WebSocket handshakes return 101 and reach the upstream
'upgrade' event, polling requests arrive with `Connection: close`, and a
3KB cookie returns 200 where the old buffer setting returned 400.

README gains a WebSocket Support section covering the PM2 cluster-mode
trap, the concurrency ceiling, and reconnects on memory restarts.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

This commit is contained in:

shadowdao

2026-08-03 07:54:32 -07:00

co-authored by

Claude Opus 5

parent bdea2939c7

commit e417a908f2

7 changed files with 72 additions and 13 deletions

									
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				| Component | Memory Usage | Notes |

				|-----------|--------------|-------|

				| **Base AlmaLinux 9** | ~80-120MB | Minimal base system |

				| **Base AlmaLinux 10** | ~80-120MB | Minimal base system |

				| **Node.js Runtime** | ~30-50MB | V8 JavaScript engine |

				| **PM2 Process Manager** | ~15-25MB | Process monitoring and management |

				| **Nginx (Optimized)** | ~8-15MB | Single worker, limited buffers |