set up kernel tunable flags

Azure · Apr 22, 2019 · 83014d0 · 83014d0
1 parent 7f3a748
commit 83014d0
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diff --git a/parts/k8s/cloud-init/artifacts/cse_install.sh b/parts/k8s/cloud-init/artifacts/cse_install.sh
@@ -320,4 +320,12 @@ datasource:
     Azure:
         apply_network_config: false
 EOF
+}
+
+# refer to https://github.com/kubernetes/kubernetes/blob/75d45bdfc9eeda15fb550e00da662c12d7d37985/pkg/kubelet/cm/container_manager_linux.go#L359-L397
+setupKernelTunables() {
+    echo "set up kernel tunable flags..."
+    sudo sysctl -w vm.overcommit_memory=1
+    sudo sysctl -w kernel/panic=10
+    sudo sysctl -w kernel/panic_on_oops=1
 }
diff --git a/parts/k8s/cloud-init/artifacts/cse_main.sh b/parts/k8s/cloud-init/artifacts/cse_main.sh
@@ -93,6 +93,7 @@ if [[ "${GPU_NODE}" = true ]]; then
 else
     cleanUpGPUDrivers
 fi
+setupKernelTunables
 installKubeletAndKubectl
 if [[ $OS != $COREOS_OS_NAME ]]; then
     ensureRPC