title: Docker tmpfs volume and increasing size
body: <p>I am starting a jenkins container like this, from a local repository:</p>
  
  <pre><code>docker run -d -p 8080:8080 -v /home/docker:/var/jenkins_home 192.168.99.101:5000/jenkins
  </code></pre>
  
  <p>the output of my container filesystem is like this:</p>
  
  <pre><code>Filesystem      Size  Used Avail Use% Mounted on
  none             19G  3.7G   14G  22% /
  tmpfs           499M     0  499M   0% /dev
  shm              64M     0   64M   0% /dev/shm
  tmpfs           499M     0  499M   0% /sys/fs/cgroup
  tmpfs           897M  801M   97M  90% /var/jenkins_home
  /dev/sda1        19G  3.7G   14G  22% /etc/hosts
  </code></pre>
  
  <p>As can be seen, /var/jenkins_home is getting full. How can I increase the size of "tmpfs"?</p>