baileytownsend.dev
Soft fork for a caddy reverse template for railway
support waking a service via the private network
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Caddyfile
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Caddyfile
···
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}
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}
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(lb_settings) {
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lb_policy round_robin
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lb_retries 100
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lb_try_duration 10s
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lb_try_interval 250ms
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}
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+
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(passive_health_checks) {
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fail_duration 60s
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max_fails 300
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unhealthy_latency 5s
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unhealthy_request_count 200
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}
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# site block, listens on the $PORT environment variable, automatically assigned by railway
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:{$PORT} {
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# access logs
···
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format json # set access log format to json mode
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}
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reverse_proxy {$FRONTEND_HOST} # proxy all requests for /* to the frontend, configure this variable in the service settings
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# proxy all requests for /* to the frontend, configure these variables in the service settings
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reverse_proxy {
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# for private networking replicas are exposed as multiple dns results, use those dns results as the upstreams
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dynamic a {
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name {$FRONTEND_DOMAIN}
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port {$FRONTEND_PORT}
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refresh 1s
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dial_timeout 30s
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versions ipv4 ipv6
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}
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# configure load balancing settings
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import lb_settings
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# configure passive health checks
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import passive_health_checks
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# sets the Host header to the header to the dynamic name and port options
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header_up Host {upstream_hostport}
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}
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# the handle_path directive WILL strip /api/ from the path before proxying
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# use `handle` instead of `handle_path` if you dont want to strip the /api/ path
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# this is needed if your backend's api routes don't start with /api/
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# change paths as needed
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handle_path /api/* {
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handle_path {$BACKEND_PATH:/api}/* {
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# the /api/ prefix WILL be stripped from the uri sent to the proxy host
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reverse_proxy {$BACKEND_HOST} # proxy all requests for /api/* to the backend, configure this variable in the service settings
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}
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#
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# proxy all requests for /api/* to the backend, configure this variable in the service settings
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reverse_proxy {
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# for private networking replicas are exposed as multiple dns results, use those dns results as the upstreams
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dynamic a {
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name {$BACKEND_DOMAIN}
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port {$BACKEND_PORT}
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refresh 1s
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dial_timeout 30s
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versions ipv4 ipv6
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}
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# this handle directive will NOT strip /api/ from the path before proxying
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# if your backend's api routes do start with /api/ then you wouldn't want to strip the path prefix
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# if so, comment out the above handle_path and reverse_proxy directives, and uncomment these handle and reverse_proxy directives
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# change paths as needed
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# handle /api/* {
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# the /api/ prefix will NOT be stripped from the uri sent to the proxy host
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# reverse_proxy {$BACKEND_HOST} # proxy all requests for /api/* to the backend, configure this variable in the service settings
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# }
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# configure load balancing settings
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import lb_settings
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# configure passive health checks
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import passive_health_checks
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# sets the Host header to the header to the dynamic name and port options
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header_up Host {upstream_hostport}
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}
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}
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}
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-3
Dockerfile
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Dockerfile
···
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FROM caddy:latest
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COPY Caddyfile /etc/caddy/Caddyfile
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WORKDIR /app
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RUN caddy fmt --overwrite /etc/caddy/Caddyfile
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COPY Caddyfile ./
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CMD exec caddy run --config /etc/caddy/Caddyfile --adapter caddyfile 2>&1
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COPY --chmod=755 entrypoint.sh ./
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RUN caddy fmt --overwrite Caddyfile
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ENTRYPOINT ["/bin/sh"]
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CMD ["entrypoint.sh"]
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entrypoint.sh
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entrypoint.sh
···
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#!/bin/sh
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set -euo pipefail
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# for backwards compatibility, seperates host and port from url
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export FRONTEND_DOMAIN=${FRONTEND_DOMAIN:-${FRONTEND_HOST%:*}}
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export FRONTEND_PORT=${FRONTEND_PORT:-${FRONTEND_HOST##*:}}
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export BACKEND_DOMAIN=${BACKEND_DOMAIN:-${BACKEND_HOST%:*}}
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export BACKEND_PORT=${BACKEND_PORT:-${BACKEND_HOST##*:}}
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# strip https:// or https:// from domain if necessary
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FRONTEND_DOMAIN=${FRONTEND_DOMAIN##*://}
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BACKEND_DOMAIN=${BACKEND_DOMAIN##*://}
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echo using frontend: ${FRONTEND_DOMAIN} with port: ${FRONTEND_PORT}
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echo using backend: ${BACKEND_DOMAIN} with port: ${BACKEND_PORT}
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exec caddy run --config Caddyfile --adapter caddyfile 2>&1