Re: Node and rc.d

I tried to change the JS code:

--8<--

console.log("Read server.js");

// debug require() => node_modules/ access

try {
const express = require("express");
console.log("require() OK");

const app = express();

app.get("/", (req, res) => {
res.send("Hello from OpenBSD");
});

app.listen(80, () => {
console.log("Server started on port 80");
});
} catch (error) {
console.log("require() failed!");
}

--EOF--

openbsd# rcctl start app
app(ok)
openbsd# cat /tmp/server.js.log
Read server.js
require() OK
Server started on port 80
openbsd# pgrep node
99648
openbsd# reboot

openbsd# cat /tmp/server.js.log
Read server.js
require() OK
Server started on port 80
openbsd# pgrep node

If I uninstall the express.js module: npm remove express

run: rcctl start app

openbsd# cat /tmp/server.js.log
Read server.js
require() failed!

I really don't understand why it doesn't work on reboot.

/Remi


Le 2023-09-27 23:42, Remi L. a écrit :
> Thank you for your reply Lucas.
>
> After the changes:
>
> openbsd# rcctl start app
> app(ok) -- it takes about 10 seconds to get it done
> openbsd# pgrep node
> 76957
> openbsd# cat /tmp/server.js.log
> Server started on port 80
> openbsd# rcctl stop app
> openbsd# reboot
>
> then:
>
> openbsd# pgrep node
> openbsd# cat /tmp/server.js.log
> Server started on port 80
> openbsd# pgrep node
> openbsd# netstat -anf inet | grep 80
> openbsd#
>
> Same issue, I think it drop the require()... it continues, that's why
> we get the Server started... message.
>
> /Remi
>
>
> Le 2023-09-27 23:26, Lucas a écrit :
>> "Remi L." <remi@sysdev.re> wrote:
>>> Hello everyone,
>>>
>>> I am an OpenBSD user and I recently installed Node.js. I managed to
>>> create an rc.d script to start a basic Node.js application, but it
>>> only
>>> starts manually.
>>>
>>> At OpenBSD boot, I can see that the application is started, but it
>>> doesn't work. I have the impression that it is related to the
>>> node_modules directory, because after inspection, the JavaScript file
>>> seems to stop at the line :
>>>
>>> const express = require("express");
>>>
>>> It cannot load the express module.
>>>
>>> Here are the full details so that you can reproduce the same error on
>>> your side:
>>>
>>> OpenBSD version: 7.3 (release + syspatch)
>>>
>>> Node version: 18.15.0
>>>
>>> npm version: 9.5.0
>>>
>>> Let's create a basic node.js app:
>>>
>>> mkdir /var/www/htdocs/app
>>> cd /var/www/htdocs/app/
>>> npm init -y
>>> npm install express
>>> touch server.js
>>> chown -R www.www /var/www/htdocs/app
>>> chmod -R 775 /var/www/htdocs/app
>>>
>>> /var/www/htdocs/app/server.js file:
>>>
>>> --8<--
>>> const express = require("express");
>>>
>>> const app = express();
>>>
>>> app.get("/", (req, res) => {
>>> res.send("Hello from OpenBSD");
>>> });
>>>
>>> app.listen(80, () => {
>>> console.log("Server started on port 80");
>>> });
>>>
>>> --EOF--
>>>
>>> You can run `node server.js` to test the url: http://your-ip
>>>
>>> Ctrl-c to quit
>>>
>>> Now let's create the /etc/rc.d/app script:
>>>
>>> --8<--
>>> #!/bin/ksh
>>>
>>> daemon="/usr/local/bin/node"
>>> daemon_execdir="/var/www/htdocs/app"
>>> daemon_flags="server.js"
>>> daemon_logger="daemon.info"
>>
>> After checking rc_exec() in /etc/rc.d/rc.subr, a hack you can try to
>> get
>> more information is removing the daemon_logger variable and change
>> daemon_flags to
>>
>> daemon_flags="server.js >/tmp/server.js.log 2>&1
>>
>> That should create a /tmp/server.js.log file with the program's stdout
>> and stderr. Give it a try with rcctl start / stop, and if it works, go
>> with a reboot.
>>
>>> #daemon_rtable=0
>>> #daemon_timeout=30
>>> #daemon_user=root
>>>
>>> . /etc/rc.d/rc.subr
>>>
>>> #pexp="$(eval echo ${daemon}${daemon_flags:+ ${daemon_flags}})"
>>> rc_bg="YES"
>>> rc_reload="NO"
>>> #rc_reload_signal=HUP
>>> #rc_stop_signal=TERM
>>> #rc_usercheck= # (undefined or "NO")
>>>
>>> #rc_configtest() {
>>> #}
>>>
>>> #rc_pre() {
>>> #}
>>>
>>> #rc_start() {
>>> # rc_exec "${daemon} ${daemon_flags}"
>>> #}
>>>
>>> #rc_check() {
>>> # pgrep -T "${daemon_rtable}" -q -xf "${pexp}"
>>> #}
>>>
>>> #rc_reload() {
>>> # pkill -${rc_reload_signal} -T "${daemon_rtable}" -xf "${pexp}"
>>> #}
>>>
>>> #rc_stop() {
>>> # pkill -${rc_stop_signal} -T "${daemon_rtable}" -xf "${pexp}"
>>> #}
>>>
>>> #rc_post() {
>>> #}
>>>
>>> rc_cmd $1
>>> --EOF--
>>>
>>> chmod +x /etc/rc.d/app
>>> rcctl enable app
>>>
>>> Start the app: rcctl start app
>>>
>>> Check in the browser or use: netstat -anf inet | grep 80
>>>
>>> Stop the app: rcctl stop app
>>>
>>> Check that it is not anymore started: pgrep node => nothing
>>>
>>> - Reboot -
>>>
>>> If I do a `dmesg -s`, I can see the following line:
>>>
>>> starting package daemons: app.
>>>
>>> No errors, no output, even in the /var/log/daemon log.
>>>
>>> I would be very grateful for any help or advice that you can provide.
>>>
>>>
>>>
>>> Sincerely,
>>>
>>> -- Remi
>>>
>>> "Everyone makes mistakes, and the best way to learn is from our
>>> mistakes." - Henry Ford

--
-- Remi