add network_sanity_check

a couple of quick early tests of the network sanity to try to help
us categorize the network quality from various zones at various
times of the day. As connectivity to pypi.openstack.org is one of
our biggest issues, use that as the test to see if this is useful.

Also test mirror.rackspace.com. Even though it's not always the
apt mirror we use, it does fail a bunch, and would be interesting
to know what it's base connectivity looks like when it does.

Change-Id: I71e4e732c8222e7cfe4775c32038eddd65f40b1b

functions.sh

@@ -43,6 +43,39 @@ function tsfilter {
     }'
 }
 
+function _ping_check {
+    local host=$1
+    local times=${2:-20}
+    echo "Testing ICMP connectivit to $host"
+    ping -c $times $host
+}
+
+function _http_check {
+    local url=$1
+    local dl='wget --progress=bar -O /dev/null'
+    if [[ `which curl` ]]; then
+        dl='curl -# -o /dev/null'
+    fi
+
+    # do a pypi http fetch, to make sure that we're good
+    for i in `seq 1 10`; do
+        echo "HTTP check of $url - attempt #$i"
+        $dl $url || /bin/true
+    done
+}
+
+# do a few network tests to baseline how bad we are
+function network_sanity_check {
+    echo "Performing network sanity check..."
+    # pypi.openstack.org
+    _ping_check pypi.openstack.org
+    _http_check http://pypi.openstack.org/openstack/
+
+    # rax ubuntu mirror
+    _ping_check mirror.rackspace.com
+    _http_check http://mirror.rackspace.com/ubuntu/dists/trusty/Release.gpg
+}
+
 # create the start timer for when the job began
 function start_timer {
     # first make sure the time is right, so we don't go into crazy land
@@ -420,6 +453,11 @@ function setup_host {
     if [ -f $DEVSTACK_GATE_SELECT_MIRROR ] ; then
         select_mirror
     fi
+
+    # perform network sanity check so that we can characterize the
+    # state of the world
+    network_sanity_check
+
     # Disable detailed logging as we return to the main script
     $xtrace
 }