I have a docker container running uhttpd and serving a static HTML page. How can I dynamically insert the hostname of the container into the static HTML page? I want to keep the container as lightweight as possible.
Why not just have a command that runs as part of the container's startup that generates the static HTML page with the hostname within it.
$ cat <<EOF > /path/to/var/www/hostname.html <html> <body> <p>hostname is: $(hostname)</p> </body> </html> EOF
This command can be placed in
/etc/rc.d/rc.local assuming you're using a SysV style of startup scripts. If you're using systemd you can also do the same, but you'll need to enable the service:
$ sudo service rc-local start
This will mark it to run, to make it run per startup:
$ sudo systemctl enable rc-local
If you're using something else, such as Upstart, there are equivalent methods for doing the same things above.
If you are using PHP, you can use the following code:
echo the output of the command
hostname. Please note that the command
system is disabled on many shared hosts for security reasons.
Alternatively, you can use:
For a static page, the easiest way would be to generate the served page from a template replacing a placeholder with whatever the
hostname command gives you. Execute that code in the entrypoint of your image.
The following is a webpage that would display the hostname. This shows the function 'inline' for web programming.
<html> <body> <?php echo gethostname(); ?> </body> </html>