Cannot start apache automatically with docker
Solution 1
Docker services have to be running in the foreground. In your Dockerfile, RUN service apache2 restart
will start apache as background process. Hence the container will exit.
To run apache in the foreground, add the following to the Dockerfile.
CMD ["/usr/sbin/apachectl", "-D", "FOREGROUND"]
FROM ubuntu:latest
RUN apt-get update && apt-get install -y apache2 php libapache2-mod-php php-mcrypt php-mysql php-cli php-curl php-xml php-intl php-mbstring git vim composer curl
COPY . /var/www/example
COPY vhost.conf /etc/apache2/sites-available/example.conf
RUN a2ensite example
RUN chown -R www-data:www-data /var/www/example/logs
CMD ["/usr/sbin/apachectl", "-D", "FOREGROUND"]
Solution 2
The above answer is probably correct that mentioned that you can start it with:
CMD apachectl -D FOREGROUND
With docker it is sometimes a good idea to use the absolute path to a binary. So for example maybe do this instead:
/usr/sbin/apache2 -D FOREGROUND
I had a look a bit on google to see what other people are doing. I found this example of a dockerfile where the guy mentions a script start.sh: From here: https://github.com/jacksoncage/apache-docker/blob/master/Dockerfile
EXPOSE 80
ADD start.sh /start.sh
RUN chmod 0755 /start.sh
CMD ["bash", "start.sh"]
Here is the start.sh script: https://github.com/jacksoncage/apache-docker/blob/master/start.sh
Which simply just does:
#!/bin/bash
# Start apache
/usr/sbin/apache2 -D FOREGROUND
Unrelated tip: Your dockerfile you need to pin the version for Ubuntu. See: https://nickjanetakis.com/blog/docker-tip-18-please-pin-your-docker-image-versions
Let me know if this helps.
Karim Mtl
Updated on June 13, 2022Comments
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Karim Mtl almost 2 years
I made a simple custom docker setup for php development. So far everything works as expected. The only thing that I cannot figure out is why apache2 does not start automatically.
Here is my dockerfile:
FROM ubuntu:latest RUN apt-get update && apt-get install -y apache2 php libapache2-mod-php php-mcrypt php-mysql php-cli php-curl php-xml php-intl php-mbstring git vim composer curl COPY . /var/www/example COPY vhost.conf /etc/apache2/sites-available/example.conf RUN a2ensite example RUN chown -R www-data:www-data /var/www/example/logs RUN service apache2 restart
And here is my docker-compose.yml:
version: '2' services: app: build: context: . dockerfile: Dockerfile image: myexampleapp ports: - 8080:80 tty: true
And here is the output docker-compose up command:
me@mydell:~/workspace/mydockercompose$ docker-compose up -d --build Creating network "mydockercompose_default" with the default driver Building app Step 1/7 : FROM ubuntu:latest ---> f975c5035748 Step 2/7 : RUN apt-get update && apt-get install -y apache2 php libapache2-mod-php php-mcrypt php-mysql php-cli php-curl php-xml php-intl php-mbstring git vim composer curl ---> Using cache ---> 148c3a9d928a Step 3/7 : COPY . /var/www/example ---> 1fbc1dbacf1e Step 4/7 : COPY vhost.conf /etc/apache2/sites-available/example.conf ---> 9c08947b09e9 Step 5/7 : RUN a2ensite example ---> Running in 1ef64defe747 Enabling site example. To activate the new configuration, you need to run: service apache2 reload Removing intermediate container 1ef64defe747 ---> ca1c8e7e80fc Step 6/7 : RUN chown -R www-data:www-data /var/www/example/logs ---> Running in 57b0214be7a0 Removing intermediate container 57b0214be7a0 ---> b3b270a36bf4 Step 7/7 : RUN service apache2 restart ---> Running in 09d2b1d3bd91 * Restarting Apache httpd web server apache2 AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message ...done. Removing intermediate container 09d2b1d3bd91 ---> 19fa9a90f9de Successfully built 19fa9a90f9de Successfully tagged myexampleapp:latest Creating mydockercompose_app_1
It shows clearly that apache was restarted successfully. However it actually does not:
me@mydell:~/workspace/mydockercompose$ docker exec -i -t 20add8ad9895 service apache2 status * apache2 is not running
I am new to docker, so all suggestions (even if they are not answering this specific question) to improve what I am doing so far are welcome.
Thanks
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Karim Mtl about 6 yearsI was able to make it run using the start script but with some tweaking ...
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Karim Mtl about 6 yearshere is the command that worked for me: CMD ["/usr/sbin/apachectl", "-D", "FOREGROUND"]
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OpenBSDNinja about 6 yearsGlad to hear that. Thanks for feeback :)
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kiwicomb123 over 2 yearsThe "/usr/sbin/apachectl" WORKS, but "apachectl" does NOT.