61 lines
1.8 KiB
Go
61 lines
1.8 KiB
Go
// +build linux
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/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package preflight
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import (
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"syscall"
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"github.com/pkg/errors"
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kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
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"k8s.io/utils/exec"
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)
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// Check validates if Docker is setup to use systemd as the cgroup driver.
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func (idsc IsDockerSystemdCheck) Check() (warnings, errorList []error) {
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driver, err := kubeadmutil.GetCgroupDriverDocker(exec.New())
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if err != nil {
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return nil, []error{err}
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}
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if driver != kubeadmutil.CgroupDriverSystemd {
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err = errors.Errorf("detected %q as the Docker cgroup driver. "+
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"The recommended driver is %q. "+
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"Please follow the guide at https://kubernetes.io/docs/setup/cri/",
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driver,
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kubeadmutil.CgroupDriverSystemd)
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return []error{err}, nil
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}
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return nil, nil
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}
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// Check number of memory required by kubeadm
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func (mc MemCheck) Check() (warnings, errorList []error) {
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info := syscall.Sysinfo_t{}
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err := syscall.Sysinfo(&info)
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if err != nil {
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errorList = append(errorList, errors.Wrapf(err, "failed to get system info"))
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}
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// Totalram returns bytes; convert to MB
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actual := uint64(info.Totalram) / 1024 / 1024
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if actual < mc.Mem {
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errorList = append(errorList, errors.Errorf("the system RAM (%d MB) is less than the minimum %d MB", actual, mc.Mem))
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}
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return warnings, errorList
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}
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