Install imagick In Docker FROM php:7.1-fpm-alpine

install-imagick-docker-php-7-1-alpine.md

docker-library/php#105

RUN set -ex \
    && apk add --no-cache --virtual .phpize-deps $PHPIZE_DEPS imagemagick-dev libtool \
    && export CFLAGS="$PHP_CFLAGS" CPPFLAGS="$PHP_CPPFLAGS" LDFLAGS="$PHP_LDFLAGS" \
    && pecl install imagick-3.4.3 \
    && docker-php-ext-enable imagick \
    && apk add --no-cache --virtual .imagick-runtime-deps imagemagick \
    && apk del .phpize-deps

Just a side note: I recently added Alpine support to my install-php-extensions script: you can easily install the imagick PHP extension (as well as many other extensions) on Alpine & Debian by running:

ADD https://raw.githubusercontent.com/mlocati/docker-php-extension-installer/master/install-php-extensions /usr/local/bin/

RUN chmod uga+x /usr/local/bin/install-php-extensions && sync && \
    install-php-extensions imagick

To install and build the imagemagick extension, the Dockerfile contents are as follows:

FROM php:7.1-fpm-alpine

RUN set -ex && \
        apk add --no-cache --virtual .build-deps \
        libxml2-dev \
        shadow \
        autoconf \
        g++ \
        make \
    && apk add --no-cache imagemagick-dev imagemagick libjpeg-turbo libgomp freetype-dev \
    && pecl install imagick \
    && docker-php-ext-enable imagick \
    && apk del .build-deps
CMD ["php-fpm"]

Super helpful. Thank you.

I found that uninstalling gcc broke imagick with PHP Warning: PHP Startup: Unable to load dynamic library 'imagick' though.

I ended up using this:

# Needed by phpize and imagick. These can be removed. Same thing as 'imagemagick-dev $PHPIZE_DEPS', but without gcc
apk add --no-cache --virtual .build-deps imagemagick-dev autoconf dpkg-dev file g++ libc-dev make pkgconf re2c
# Needed by phpize and imagick. Cannot remove these.
apk add --no-cache imagemagick gcc
printf "\n" | pecl install imagick
docker-php-ext-enable imagick
php -v
php -m
apk del .build-deps

I found that uninstalling gcc broke imagick

I don't think imagick needs gcc. I think the problem is that when you uninstall gcc, apk will also uninstall other system libraries that are required by imagick.