Re-add net.bridge settings for flannel #13564
Merged
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This was originally only set on Centos 7 / RHEL 7 but we're experiencing similar issues on Amazon Linux 2
backstory:
This PR's lengthy discussion to remove support for flannel/vxlan after the same issues were causing grid failures for Centos 7 / RHEL 7: #8614
These sysctl settings were added for centos/rhel which supposedly fixed our grid jobs: #8381
These settings were removed when we dropped support for those distros: https://github.com/kubernetes/kops/pull/12882/files#diff-5326919ae93590b94b210fb2373f8374d5567d146aadaf815ca6a1f7b68179dd
Hoping this fixes these grid jobs: https://testgrid.k8s.io/kops-grid#kops-grid-flannel-amzn2-k23-docker