mirror of
https://github.com/kevinveenbirkenbach/computer-playbook.git
synced 2026-11-06 19:01:54 +00:00
kevinveenbirkenbachandClaude Opus 5.5
f52da1c875
The shared proxy's nginx.conf derived worker_connections from the
openresty container's pids_limit. pids_limit caps processes and threads,
worker_connections caps simultaneous sockets per worker (client and
upstream), so with pids_limit 256 and one worker the whole host's proxy
held about 256 sockets, roughly 128 proxied requests in flight across
every vhost. Raising pids_limit to buy connections would loosen the
fork-bomb guard.
svc-prx-openresty now declares services.openresty.worker_connections
(4096 per worker, the common nginx production range, enough for several
chunk-heavy apps such as OpenWebUI at ~150-170 requests per page load).
WEBSERVER_PROXY_WORKER_CONNECTIONS reads it through lookup('config'),
without a default, so a missing key fails loudly. pids_limit stays 256.
WEBSERVER_PROXY_WORKER_RLIMIT_NOFILE is derived as 2x worker_connections
(8192), one descriptor for each client and upstream socket of a proxied
request, and nginx.conf renders it as worker_rlimit_nofile. The openresty
container pins its nofile ulimit (soft and hard) to the same value:
workers call setrlimit as root without CAP_SYS_RESOURCE, so they can only
lower the hard limit, and the inherited hard limit depends on the host
daemon (Docker >= 25 defaults to 1024:524288, DiD nests whatever the
outer container has). An explicit ulimit makes the rlimit succeed on
every host instead of logging a setrlimit alert.
The unit test pins worker_connections 4096, worker_rlimit_nofile 8192 and
the container ulimit, and fails when worker_connections follows
pids_limit again.
Live proof (compose deploy of web-svc-html, both plays failed=0): the
deployed nginx.conf renders worker_rlimit_nofile 8192 and
worker_connections 4096; openresty's master, worker and cache manager
run with "Max open files 8192 8192"; the openresty log carries no
setrlimit or "worker_connections are not enough" line.
Closes #1300
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>