optimize size and time using "--no-cache-dir"

Using "--no-cache-dir" flag in pip install ,make sure dowloaded packages
by pip don't cached on system . This is a best practise which make sure
to fetch ftom repo instead of using local cached one . Further , in case
of Docker Containers , by restricing caching , we can reduce image size.
In term of stats , it depends upon the number of python packages
multiplied by their respective size . e.g for heavy packages with a lot
of dependencies it reduce a lot by don't caching pip packages.

Further , more detail information can be found at

https://medium.com/sciforce/strategies-of-docker-images-optimization-2ca9cc5719b6

Issue-ID: MULTICLOUD-1080

Signed-off-by: Pratik Raj <rajpratik71@gmail.com>
Change-Id: Ib79fae7e69eb669e39bc3eb52373668367460ba2

2 files changed, 3 insertions, 3 deletions

diff --git a/kud/tests/_common_test.sh b/kud/tests/_common_test.sh
index 32781e18..0ca606b6 100755
--- a/kud/tests/_common_test.sh
+++ b/kud/tests/_common_test.sh
@@ -36,7 +36,7 @@ function install_ipcalc {
 function install_ovn_deps {
     if ! $(yq --version &>/dev/null); then
         install_deps # jq needed as it's dependency of yq
-        sudo -E pip install yq
+        sudo -E pip install --no-cache-dir yq
     fi
     if ! $(ovn-nbctl --version &>/dev/null); then
         function ovn_ubuntu_deps {
diff --git a/kud/tests/cFW/postinstall.sh b/kud/tests/cFW/postinstall.sh
index 5a1d5043..ec2cba49 100755
--- a/kud/tests/cFW/postinstall.sh
+++ b/kud/tests/cFW/postinstall.sh
@@ -57,8 +57,8 @@ function install_docker_compose {
     if ! which pip; then
         curl -sL https://bootstrap.pypa.io/get-pip.py | python
     fi
-    pip install --upgrade pip
-    pip install docker-compose
+    pip install --no-cache-dir --upgrade pip
+    pip install --no-cache-dir docker-compose
 }
 
 echo 'vm.nr_hugepages = 1024' >> /etc/sysctl.conf