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#!/bin/sh
# vim:sw=4:ts=4:et
set -e
entrypoint_log() {
if [ -z "${NGINX_ENTRYPOINT_QUIET_LOGS:-}" ]; then
echo "$@"
fi
}
ME=$(basename "$0")
DEFAULT_CONF_FILE="etc/nginx/conf.d/default.conf"
# check if we have ipv6 available
if [ ! -f "/proc/net/if_inet6" ]; then
entrypoint_log "$ME: info: ipv6 not available"
exit 0
fi
if [ ! -f "/$DEFAULT_CONF_FILE" ]; then
entrypoint_log "$ME: info: /$DEFAULT_CONF_FILE is not a file or does not exist"
exit 0
fi
# check if the file can be modified, e.g. not on a r/o filesystem
touch /$DEFAULT_CONF_FILE 2>/dev/null || { entrypoint_log "$ME: info: can not modify /$DEFAULT_CONF_FILE (read-only file system?)"; exit 0; }
# check if the file is already modified, e.g. on a container restart
grep -q "listen \[::]\:8080;" /$DEFAULT_CONF_FILE && { entrypoint_log "$ME: info: IPv6 listen already enabled"; exit 0; }
if [ -f "/etc/os-release" ]; then
. /etc/os-release
else
entrypoint_log "$ME: info: can not guess the operating system"
exit 0
fi
entrypoint_log "$ME: info: Getting the checksum of /$DEFAULT_CONF_FILE"
case "$ID" in
"debian")
CHECKSUM=$(dpkg-query --show --showformat='${Conffiles}\n' nginx | grep $DEFAULT_CONF_FILE | cut -d' ' -f 3)
echo "$CHECKSUM /$DEFAULT_CONF_FILE" | md5sum -c - >/dev/null 2>&1 || {
entrypoint_log "$ME: info: /$DEFAULT_CONF_FILE differs from the packaged version"
exit 0
}
;;
"alpine")
CHECKSUM=$(apk manifest nginx 2>/dev/null| grep $DEFAULT_CONF_FILE | cut -d' ' -f 1 | cut -d ':' -f 2)
echo "$CHECKSUM /$DEFAULT_CONF_FILE" | sha1sum -c - >/dev/null 2>&1 || {
entrypoint_log "$ME: info: /$DEFAULT_CONF_FILE differs from the packaged version"
exit 0
}
;;
*)
entrypoint_log "$ME: info: Unsupported distribution"
exit 0
;;
esac
# enable ipv6 on default.conf listen sockets
sed -i -E 's,listen 8080;,listen 8080;\n listen [::]:8080;,' /$DEFAULT_CONF_FILE
entrypoint_log "$ME: info: Enabled listen on IPv6 in /$DEFAULT_CONF_FILE"
exit 0
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