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reset.go
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reset.go
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/*
Copyright 2019 The KubeOne Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package installation
import (
"github.com/kubermatic/kubeone/pkg/config"
"github.com/kubermatic/kubeone/pkg/ssh"
"github.com/kubermatic/kubeone/pkg/templates/machinecontroller"
"github.com/kubermatic/kubeone/pkg/util"
)
// Reset undos all changes made by KubeOne to the configured machines.
func Reset(ctx *util.Context) error {
ctx.Logger.Infoln("Resetting kubeadm…")
if ctx.DestroyWorkers {
if err := ctx.RunTaskOnLeader(destroyWorkers); err != nil {
return err
}
}
return ctx.RunTaskOnAllNodes(resetNode, true)
}
func destroyWorkers(ctx *util.Context, _ *config.HostConfig, conn ssh.Connection) error {
ctx.Logger.Infoln("Destroying worker nodes…")
_, _, err := ctx.Runner.Run(destroyScript, util.TemplateVariables{
"WORK_DIR": ctx.WorkDir,
"MACHINE_NS": machinecontroller.MachineControllerNamespace,
})
return err
}
func resetNode(ctx *util.Context, _ *config.HostConfig, conn ssh.Connection) error {
ctx.Logger.Infoln("Resetting node…")
_, _, err := ctx.Runner.Run(resetScript, util.TemplateVariables{
"WORK_DIR": ctx.WorkDir,
})
return err
}
const destroyScript = `
if kubectl cluster-info > /dev/null; then
kubectl annotate --all --overwrite node kubermatic.io/skip-eviction=true
kubectl delete machinedeployment -n "{{ .MACHINE_NS }}" --all
kubectl delete machineset -n "{{ .MACHINE_NS }}" --all
kubectl delete machine -n "{{ .MACHINE_NS }}" --all
for try in {1..30}; do
if kubectl get machine -n "{{ .MACHINE_NS }}" 2>&1 | grep -q 'No resources found.'; then
exit 0
fi
sleep 10s
done
echo "Error: Couldn't delete all machines!"
exit 1
fi
`
const resetScript = `
sudo kubeadm reset --force
sudo rm /etc/kubernetes/cloud-config
rm -rf "{{ .WORK_DIR }}"
`