Pre-load ipip kernel module to prevent flake.

projectcalico · May 18, 2021 · 0e3e12e · 0e3e12e
1 parent c334f05
commit 0e3e12e
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diff --git a/.semaphore/create-test-vm b/.semaphore/create-test-vm
@@ -40,6 +40,7 @@ function create-vm() {
   gcloud --quiet compute ssh --zone=${zone} "ubuntu@${vm_name}" -- sudo apt-get update -y && \
   gcloud --quiet compute ssh --zone=${zone} "ubuntu@${vm_name}" -- sudo apt-get install -y --no-install-recommends git make iproute2 docker.io wireguard && \
   gcloud --quiet compute ssh --zone=${zone} "ubuntu@${vm_name}" -- sudo usermod -a -G docker ubuntu && \
+  gcloud --quiet compute ssh --zone=${zone} "ubuntu@${vm_name}" -- sudo modprobe ipip && \
   set +x && \
   echo "$DOCKERHUB_PASSWORD" | gcloud --quiet compute ssh --zone=${zone} "ubuntu@${vm_name}" -- docker login --username "$DOCKERHUB_USERNAME" --password-stdin && \
   set -x && \

diff --git a/.semaphore/semaphore.yml b/.semaphore/semaphore.yml
@@ -79,6 +79,9 @@ blocks:
       - docker load -i /tmp/calico-felix.tar
       - rm /tmp/calico-felix.tar
       - touch bin/*
+      # Pre-loading the IPIP module prevents a flake where the first felix to use IPIP loads the module and
+      # routing in that first felix container chooses different source IPs than the tests are expecting.
+      - sudo modprobe ipip
     jobs:
     - name: FV Test matrix
       commands: