How to update wordpress on docker

Question

I\'m running a php-fpm wordpress container.

The wordpress source files are mounted in a named volume "wordpress" shared with the Nginx container.

Everyth

Answer 1

To expend on @Bigbenny's answer, my Dockerfile looked like the following:

FROM wordpress:latest

WORKDIR /var/www/html

COPY . /var/www/html

COPY check-wordpress-version.sh /usr/local/bin/

RUN chmod 755 /usr/local/bin/check-wordpress-version.sh

ENTRYPOINT ["/usr/local/bin/check-wordpress-version.sh"]

Two things to notice here:

1. I had to chmod 755 the file or I would get a permissions denied error
2. I placed the script inside the /usr/local/bin because for some reason when I would just use ENTRYPOINT["check-wordpress-version.sh"], the file wouldn't be found by the container.

I also, slightly tweaked the script to look like:

#!/bin/sh

VOLUME_VERSION="$(php -r 'require('"'"'/var/www/html/wp-includes/version.php'"'"'); echo $wp_version;')"
echo "Volume version : "$VOLUME_VERSION
echo "WordPress version : "$WORDPRESS_VERSION

if [ $VOLUME_VERSION != $WORDPRESS_VERSION ]; then
    echo "Forcing WordPress code update..."
    rm -f /var/www/html/index.php
    rm -f /var/www/html/wp-includes/version.php
fi

docker-entrypoint.sh apache2-foreground

For my use-case, I had to use apache2-foreground rather than php-fpm; I also deleted the /var/www/html/wp-includes/version.php file.

Finally, in my docker-compose, instead of the using the image directive; I used build: ./wordpress.

I hope this helps!