Fix apt-get reliability issues.

This is frequently causing the core build scripts to fail. The core ubuntu
distribution will perform an auto-update at first start, which may cause the
lock file to be held. All apt-get commands may be done in a loop in order to
retry to avoid this issue. We may want to consider retrying other pieces, but
for now this should avoid the most frequent cause of build flakes.

PiperOrigin-RevId: 297704789

1 files changed, 26 insertions, 7 deletions

diff --git a/tools/images/ubuntu1604/25_docker.sh b/tools/images/ubuntu1604/25_docker.sh
index 1d3defcd3..11eea2d72 100755
--- a/tools/images/ubuntu1604/25_docker.sh
+++ b/tools/images/ubuntu1604/25_docker.sh
@@ -15,12 +15,20 @@
 # limitations under the License.
 
 # Add dependencies.
-apt-get update && apt-get -y install \
-    apt-transport-https \
-    ca-certificates \
-    curl \
-    gnupg-agent \
-    software-properties-common
+while true; do
+  if (apt-get update && apt-get install -y \
+      apt-transport-https \
+      ca-certificates \
+      curl \
+      gnupg-agent \
+      software-properties-common); then
+    break
+  fi
+  result=$?
+  if [[ $result -ne 100 ]]; then
+    exit $result
+  fi
+done
 
 # Install the key.
 curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -
@@ -32,4 +40,15 @@ add-apt-repository \
    stable"
 
 # Install docker.
-apt-get update && apt-get install -y docker-ce docker-ce-cli containerd.io
+while true; do
+  if (apt-get update && apt-get install -y \
+      docker-ce \
+      docker-ce-cli \
+      containerd.io); then
+    break
+  fi
+  result=$?
+  if [[ $result -ne 100 ]]; then
+    exit $result
+  fi
+done