overleaf/init_scripts/01_nginx_config_template.sh
Shane Kilkelly d674a12167
Variables in Nginx configuration (#853)
* Add envsubst binary to image

* Generate nginx.conf from template, with env-vars

* Remove nginx.conf, now generated from template

* Reload nginx config after writing file

Co-authored-by: Shane Kilkelly <shane.kilkelly@overleaf.com>
2021-04-07 15:19:06 +02:00

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#!/bin/sh
set -e
## Generate nginx config files from templates,
## with environment variables substituted
nginx_dir='/etc/nginx'
nginx_templates_dir="${nginx_dir}/templates"
if ! [ -d "${nginx_templates_dir}" ]; then
echo "Nginx: no template directory found, skipping"
exit 0
fi
nginx_template_file="${nginx_templates_dir}/nginx.conf.template"
nginx_config_file="${nginx_dir}/nginx.conf"
if [ -f "${nginx_template_file}" ]; then
export NGINX_WORKER_PROCESSES="${NGINX_WORKER_PROCESSES:-4}"
export NGINX_WORKER_CONNECTIONS="${NGINX_WORKER_CONNECTIONS:-768}"
echo "Nginx: generating config file from template"
# Note the single-quotes, they are important.
# This is a pass-list of env-vars that envsubst
# should operate on.
envsubst '${NGINX_WORKER_PROCESSES} ${NGINX_WORKER_CONNECTIONS}' \
< "${nginx_template_file}" \
> "${nginx_config_file}"
echo "Nginx: reloading config"
service nginx reload
fi