--- a/docker/libervia_cont.sh	Mon Feb 29 21:50:53 2016 +0100
+++ b/docker/libervia_cont.sh	Mon Feb 29 21:54:41 2016 +0100
@@ -158,6 +158,30 @@
     fi
 }
 
+check_docker_version() {
+    # check if current docker version is greater than or equal to the requested one
+    wanted_major=$1
+    wanted_minor=$2
+    wanted_rev=$3
+    raw=$(docker --version | grep -o '\([0-9]\+\)\.[0-9]\+\.[0-9]\+')
+    docker_major=$(echo "$raw" |  cut -d . -f 1)
+    docker_minor=$(echo "$raw" |  cut -d . -f 2)
+    docker_rev=$(echo "$raw" |  cut -d . -f 3)
+    for name in major minor rev; do
+        docker_val=$(eval echo \$docker_$name)
+        wanted_val=$(eval echo \$wanted_$name)
+        if [ $docker_val -gt $wanted_val ]; then
+            return 0
+        fi
+        if [ $docker_val -lt $wanted_val ]; then
+            return 1
+        fi
+    done
+
+    # wanted version and docker version are the same
+    return 0
+}
+
 parse_run_args() {
     # manage arguments for run command
 
@@ -299,7 +323,7 @@
             # we test the presence of "starting on xxxx" (where xxxx is one of the exposed ports)
             # this is not really reliable as ports can be changed in configuration
             # but in most case it should work OK
-            PORTS_REGEX=$(get_dyn_var $TEST_CONT ports | sed 's/ /\\|/')    
+            PORTS_REGEX=$(get_dyn_var $TEST_CONT ports | sed 's/ /\\|/')
             docker logs $TEST_CONT | grep "starting on \($PORTS_REGEX\)" > /dev/null 2>&1
             if [ $? -ne 0 ]; then
                 printf " but no server is started\n"