I had problems mounting NFS shares in my docker container, error would appear with permissions denied. This is the fix which worked for me.
Inside the container execute the following.
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apt-get update apt-get install nfs-common -y |
on the host execute the following to mount the share.
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docker exec --privileged=true 191b603b04b9 mount -t nfs -o nolock 192.168.1.5:local /mnt |
I have written a script which will setup Nextcloud on a Ubuntu Docker container. Ill run through the entire process.
First we need to download the correct image into docker.
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docker pull ubuntu:1604 |
Then we need to start the container with the os.
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docker run -t -d -p 10000:80 -i ubuntu:16.04 /bin/bash |
Now we need to find the unique id of the container
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docker ps -a |
Now on the host, so not the container. Create the script.
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vim script.sh |
Now paste the following into the script.
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apt-get update apt-get upgrade -y apt-get install apache2 mariadb-server libapache2-mod-php7.0 php7.0-gd php7.0-json php7.0-mysql php7.0-curl php7.0-mbstring php7.0-intl php7.0-mcrypt php-imagick php7.0-xml php7.0-zip install unzip sudo openssh-server -y /etc/init.d/ssh start wget https://download.nextcloud.com/server/releases/nextcloud-13.0.2.zip -O /tmp/nextcloud-13.0.2.zip cd /tmp/ unzip nextcloud-13.0.2.zip mv /tmp/nextcloud /var/www/html/ chown -R www-data:www-data /var/www/html/nextcloud/ rm -rf /tmp/nextcloud-13.0.2.zip /etc/init.d/apache2 start /etc/init.d/mysql start mysql -uroot -e "create database nextcloud;" mysql -uroot -e "GRANT ALL PRIVILEGES ON nextcloud.* TO 'nextcloud'@'localhost' IDENTIFIED BY 'nextcloud';" cd /var/www/html/nextcloud/ sudo -u www-data php occ maintenance:install --database "mysql" --database-name "nextcloud" --database-user "nextcloud" --database-pass "nextcloud" --admin-user "admin" --admin-pass "password" |
Now adjust the permissions to make it executable.
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chmod 700 script.sh |
Now lets copy it over to the container
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docker cp script.sh id:/tmp/ |
Then jump on the console.
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docker attach id# |
Once your connected in, execute the script, this will install setup everything.
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/tmp/script.sh |
Once complete. Hit your web browser, navigate to https://localhost:10000/nextcloud. Should see the logon page, your credentials are Username: admin Password: password
This has to be one of the easiest tasks!
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apt-get update apt-get upgrade -y curl -sSL https://get.docker.com | sh |
This will completed all the tasks in the background
Enjoy
I wasted alot of time trying to figure out how to use Apache as a reverse proxy to load balance two of my web servers.
I thought I would write a little howto on how to get this up and running quickly.
I know used this setup with docker, using two containers running a standard installation of Apache and the other running Apache with the below configuration (Load Balancer)
Lets get started
The following commands will install all the required software using apt and aptitude.
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apt-get install -y aptitude apache2 aptitude install -y libapache2-mod-proxy-html libxml2-dev |
Run the following to install all the required Apache modules.
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a2enmod proxy a2enmod proxy_http a2enmod proxy_ajp a2enmod rewrite a2enmod deflate a2enmod headers a2enmod proxy_balancer a2enmod proxy_connect a2enmod proxy_html a2enmod xml2enc a2enmod lbmethod_byrequests |
Now we need up edit the following Apache configuration file.
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vim /etc/apache2/sites-available/000-default.conf |
This is what the configuration file should look like, please change the IPs and ports of the webservers your proxying.
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<VirtualHost *:80> <Proxy balancer://mycluster> BalancerMember http://10.1.1.35:10001 BalancerMember http://10.1.1.35:10003 </Proxy> ProxyPreserveHost On ProxyPass / balancer://mycluster/ ProxyPassReverse / balancer://mycluster/ </VirtualHost> |
Restart Apache and your ready to rock and roll!
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/etc/init.d/apache2 restart |
I’m playing around with docker containers, I just wanted to build a docker container and run a service on it which will be accessible externally.
Lets start by getting a fresh ubuntu image from the repos.
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docker pull ubuntu |
Lets see what images are now available, you should see the latest download in the list.
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docker images |
You see this. We’ll pick the newest one.
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root@zeus:~# docker images REPOSITORY TAG IMAGE ID CREATED SIZE ubuntu latest ccc7a11d65b1 4 weeks ago 120MB ubuntu 14.06 2a05d9f50082 5 weeks ago 231MB ubuntu <none> 14f60031763d 7 weeks ago 120MB hello-world latest 1815c82652c0 2 months ago 1.84kB |
Now this is how we select the image and open the ports, see the “-p” switches? This will open SSH (22) and Web (80).
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docker run -i -t -p 22 -p 80 ccc7a11d65b1 /bin/bash |
This will build the container, once your at the logon prompt you will need to install the services, ie
This will update apt and install apache and ssh
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apt-get update apt-get install openssh-server apache2 |
This will start the services.
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/etc/init.d/apache2 start /etc/init.d/ssh start |
This will enable the services to start at startup.
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update-rc.d ssh enable update-rc.d apache2 enable |
Now the container is setup we can exit out.
Once we have exited we’ll start the container.
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docker start webserver01 |
Now we need to find out if the container is running, and if its running which random ports its assigned to our services.
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docker ps -a |
That command will display the following.
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CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 82389fa65e87 ccc7a11d65b1 "/bin/bash" 41 minutes ago Up 7 minutes 0.0.0.0:32781->22/tcp, 0.0.0.0:32780->80/tcp webservice01 |
Now the above output tells us the container is running and it has assigned ports to out services. So if you put up the webbrowser on your computer and put the hosts IP in like this,
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http://10.1.1.100:32780 |
Now you should see the apache test page.
or is you want to ssh into the container enter this command
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ssh g33k@10.1.1.100 -p 32781 |
Just name sure you setup a user account on the container first.
A quick crash course on how to get a docker container up and going on a Ubuntu 16.04 server.
01. This first section will essentially install the docker repos onto the Ubuntu box.
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sudo su - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" apt-get update apt-cache policy docker-ce |
02. This will actually install docker.
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apt-get install -y docker-ce |
03. Check that its running.
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systemctl status docker |
04. This will test that docker is properly installed and able to execute docker containers.
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docker run hello-world |
05. This will download the ubuntu image from the repo.
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docker pull ubuntu:14.04 |
06. The will need to list the images which are available to us, taking note of the image ID
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docker images |
07. Then we cut-n-paste the ID into the command below.
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docker run -i -t ad892dd21d60 /bin/bash |
08. You will now notice your running a full blown Ubuntu OS which is actually in a container, this is tested by checking what procs are running by typing “ps waux”, there should only be a few procs running.
09. Exit out of the container, this will end the container
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exit |
10. The following command will show you the available containers
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docker ps -a |
11. Determine which container you worked on, cut and paste the ID into the command below to start it in the background.
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docker start 23894732 |
12. The container is now running, can may connect to it on the terminal by typing the following command and pasting the ID at the end.
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docker attach 23894732 |
All you need to know to get you going!