Migrate from Centos to Alpine base container

Closes #2

Dockerfile

@@ -1,16 +1,19 @@
-FROM centos:latest
+FROM alpine:latest
 MAINTAINER BBVA Innovation <[email protected]>
 ENV container docker
 
-RUN yum clean all \
-    && yum update -y \
-    && yum install -y qemu-kvm bridge-utils iproute dnsmasq \
-    && yum clean all
+RUN apk -U --no-cache add       \
+      qemu                      \
+      qemu-system-x86_64        \
+      bridge-utils              \
+      bash                      \
+      dnsmasq                   \
+    && rm -rf /var/cache/apk/*
 
 COPY startvm /usr/local/bin/startvm
 RUN chmod u+x /usr/local/bin/startvm
 
 VOLUME /image
 
 ENTRYPOINT ["/usr/local/bin/startvm"]
-CMD []
+CMD []

startvm

@@ -7,7 +7,7 @@
 
 # If no arguments, the VM will lauch with 4 cores and 1GB of memory
 
-: ${LAUNCHER:='/usr/libexec/qemu-kvm'}
+: ${LAUNCHER:='/usr/bin/qemu-system-x86_64'}
 : ${DNSMASQ_CONF_DIR:='/etc/dnsmasq.d'}
 : ${DNSMASQ:='/usr/sbin/dnsmasq'}
 : ${ENABLE_DHCP:='Y'}
@@ -19,7 +19,7 @@
   "}
 
 : ${KVM_OPTS:="\
-  -machine rhel6.0.0,accel=kvm,usb=off \
+  -machine accel=kvm,usb=off \
   -nodefaults \
   -no-acpi \
   -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \