From: Anil Belur <abelur@linuxfoundation.org>
Date: Tue, 7 Nov 2017 22:14:26 +0000 (+1000)
Subject: Ensure apt is not locked on Ubuntu nodes
X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=commitdiff_plain;h=e05ebe5db2bfef9201d3c46a76af2b60d03c912d;p=releng%2Fbuilder.git

Ensure apt is not locked on Ubuntu nodes

A background apt process locks /var/lib/dpkg/lock and causes apt
commands to fail. Therefore check if apt is locked before running
apt.

Errors:
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource
temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg), is
another process using

Change-Id: I3ced3711b26ebe9ecf5654c70d23f44e905c1f4c
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>
---

diff --git a/packer/provision/baseline.sh b/packer/provision/baseline.sh
index 78e3b64a87..978296bb57 100644
--- a/packer/provision/baseline.sh
+++ b/packer/provision/baseline.sh
@@ -79,6 +79,10 @@ ensure_ubuntu_install() {
         # Retry installing package 5 times if necessary
         for i in {0..5}
         do
+
+            # Wait for any background apt processes to finish before running apt
+            while pgrep apt > /dev/null; do sleep 1; done
+
             echo "$i: Installing $pkg"
             if [ "$(dpkg-query -W -f='${Status}' "$pkg" 2>/dev/null | grep -c "ok installed")" -eq 0 ]; then
                 apt-cache policy "$pkg"