Automated cherry pick of #5979: Skip loading openvswitch Kernel module if built-in (#5979) #6007
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If a module is built-in, trying to load the module with modprobe inside a container may fail (insted of just being a no-op). This will cause Antrea initialization to fail unless agent.dontLoadKernelModules is explicitly set to true. Now that the Docker Desktop LinuxKit VM comes with openvswitch built-in (starting with 4.27.0), trying to install "default" Antrea (i.e., without setting agent.dontLoadKernelModules) in a Kind cluster running with Docker Desktop on macOS will fail. To make sure that users will not run into this issue, we add logic to the install_cni script to skip the modprobe call if the module is built-in. After this change, there should be very limited use cases for the agent.dontLoadKernelModules parameter, but there is no harm in keeping in case it is needed in the future or for some corner cases. I also realized that the "--skip-kmod" flag for the start_ovs script did not provide any value. Either the openvswitch module needs to be explicitly loaded, in which case the install_cni script will take care of it anyway, or it should not be loaded at all (e.g., because it is built-in). Additionally, because we do not mount the host's /lib/modules to the antrea-ovs container, it is not possible to load any kernel module from the container. Fixes antrea-io#5939 Signed-off-by: Antonin Bas <[email protected]>
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Cherry pick of #5979 on release-1.15.
#5979: Skip loading openvswitch Kernel module if built-in (#5979)
For details on the cherry pick process, see the cherry pick requests page.