* Refactoring

* Fix issue that causes a new image store to be created at every start of ucloud-api.
* VM Migration API call now takes hostname instead of host key.
* StorageHandler Classes are introduced. They transparently handles things related to importing of image, make vm out of image, resize vm image, delete vm image etc.
* Loggers added to __init__.py of every ucloud component's subpackage.
* Non-Trivial Timeout Events are no longer logged.
* Fix issue that prevents removal of stopped VMs (i.e VMs that are successfully migrated).
* Improved unit handling added. e.g MB, Mb, mB, mb are all Mega Bytes.
* VM migration is now possible on IPv6 host.
* Destination VM (receiving side of migration of a vm) now correctly expects incoming data on free ephemeral port.
* Traceback is no longer output to screen, instead it goes to log file.
* All sanity checks are put into a single file. These checks are run by ucloud.py before running any of ucloud component.

docs/source/introduction/installation.rst

@@ -135,7 +135,7 @@ You just need to update **AUTH_SEED** in the below code to match your auth's see
 
     ETCD_URL=localhost
 
-    WITHOUT_CEPH=True
+    STORAGE_BACKEND=filesystem
 
     BASE_DIR=/var/www
     IMAGE_DIR=/var/image
@@ -195,3 +195,35 @@ profile e.g *~/.profile*
     alias uotp='cd /root/uotp/ && pipenv run python app.py'
 
 and run :code:`source ~/.profile`
+
+
+Arch
+-----
+
+.. code-block:: sh
+
+    # Update/Upgrade
+    pacman -Syuu
+    pacman -S python3 qemu chrony python-pip
+
+    pip3 install pipenv
+
+    cat > /etc/chrony.conf << EOF
+    server 0.arch.pool.ntp.org
+    server 1.arch.pool.ntp.org
+    server 2.arch.pool.ntp.org
+    EOF
+
+    systemctl start chronyd
+    systemctl enable chronyd
+
+    # Create non-root user and allow it sudo access
+    # without password
+    useradd -m ucloud
+    echo "ucloud ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
+
+    sudo -H -u ucloud bash -c 'cd /home/ucloud && git clone https://aur.archlinux.org/yay.git && cd yay && makepkg -si'
+    sudo -H -u ucloud bash -c 'yay -S etcd'
+
+    systemctl start etcd
+    systemctl enable etcd