Volume moving tutorial - fixes 131

[itamarst]

Fixes #131.

In order for tutorial to actually work #405 and #410 will need to be merged, so might want to hold off on review until those are in.

[wallrj]

I began the tutorial again while reviewing #396 but got an error which I think may be caused by the new mongo docker image in this branch and which might be remedied by #392

Pulling repository dockerfile/mongodb

Stderr from the command:

Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
2014/08/04 03:08:08 Error: write /tmp/docker-export-317438209/9c1219bb985cb5ceb0a602ad943c9dd5b83cf0f16d3cd05730113fe0af37d0be/layer.tar: no space left on device

[wallrj]

/tmp ran out of space for me when I ran vagrant up

Stderr from the command:

Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
2014/08/04 03:08:08 Error: write /tmp/docker-export-317438209/9c1219bb985cb5ceb0a602ad943c9dd5b83cf0f16d3cd05730113fe0af37d0be/layer.tar: no space left on device

I changed it to /var/tmp and the vagrant build was able to complete.

[wallrj]

Actually, it didn't finish. The previously saved image was empty and that empty image got cached by vagrant-cachier.

Trying again.

[wallrj]

I made the following changes to the tutorial vagrantfile.

• set -x is quite useful to be able to see the cause of errors in bootstrap.sh
• systemctl restart docker seems to be necessary for the new tmpdir to take effect. I guess on my base os, docker is already running.

Maybe these things should be addressed in other tickets...

$ git diff
diff --git a/docs/tutorial/Vagrantfile b/docs/tutorial/Vagrantfile
index 1fa8197..76b4ac1 100644
--- a/docs/tutorial/Vagrantfile
+++ b/docs/tutorial/Vagrantfile
@@ -9,7 +9,7 @@ VAGRANTFILE_API_VERSION = "2"


 $bootstrap = <<SCRIPT
-set -e
+set -ex


 yum install -y zfs
@@ -26,7 +26,7 @@ echo "# Flocker-defined alternate temporary path to provide more temporary space
 echo "TMPDIR=/var/tmp" >> /etc/sysconfig/docker

 systemctl enable docker
-systemctl start docker
+systemctl restart docker
 systemctl enable geard
 systemctl start geard

@@ -57,8 +57,8 @@ else
   fi
 fi

-mkdir /tmp/dockerbuild
-cd /tmp/dockerbuild
+mkdir /var/tmp/dockerbuild
+cd /var/tmp/dockerbuild
 echo "FROM dockerfile/mongodb\nCMD mongod --dbpath=/data --noprealloc --smallfiles" > Dockerfile
 docker build --tag mongodb-tutorial .
 SCRIPT
@@ -68,6 +68,10 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   config.vm.provision :file, :source => "clusterhq-flocker.repo", :destination => "clusterhq-flocker.rep
   config.vm.provision :shell, :inline => $bootstrap, :privileged => true

+  config.vm.provider "virtualbox" do |v|
+    v.memory = 1024
+  end
+
   if Vagrant.has_plugin?("vagrant-cachier")
     config.cache.scope = :box
   end

[wallrj]

Thanks @itamarst I've followed the volume tutorial twice now once with master (where it worked under certain circumstances) and again with the gear async remove improvements from #410, where the steps worked perfectly.

I had some trouble setting up the tutorial environment until I modified the systemctl reload docker and /var/tmp lines in the diff above; so I suggest applying those.

Drop the vm memory change, unless you think it's worth keeping.

Then please merge. That'll allow the guys in Bristol to do further testing tomorrow morning and hopefully reveal more bugs.