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92 lines
3.2 KiB
Go
92 lines
3.2 KiB
Go
//go:build linux
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// +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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system "k8s.io/system-validators/validators"
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utilsexec "k8s.io/utils/exec"
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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 holds the total usable memory. Unit holds the size of a memory unit in bytes. Multiply them and convert to MB
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actual := uint64(info.Totalram) * uint64(info.Unit) / 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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// addOSValidator adds a new OSValidator
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func addOSValidator(validators []system.Validator, reporter *system.StreamReporter) []system.Validator {
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validators = append(validators, &system.OSValidator{Reporter: reporter}, &system.CgroupsValidator{Reporter: reporter})
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return validators
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}
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// addIPv6Checks adds IPv6 related bridgenf and forwarding checks
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func addIPv6Checks(checks []Checker) []Checker {
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checks = append(checks,
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FileContentCheck{Path: bridgenf6, Content: []byte{'1'}},
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FileContentCheck{Path: ipv6DefaultForwarding, Content: []byte{'1'}},
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)
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return checks
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}
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// addIPv4Checks adds IPv4 related bridgenf and forwarding checks
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func addIPv4Checks(checks []Checker) []Checker {
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checks = append(checks,
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FileContentCheck{Path: bridgenf, Content: []byte{'1'}},
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FileContentCheck{Path: ipv4Forward, Content: []byte{'1'}})
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return checks
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}
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// addSwapCheck adds a swap check
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func addSwapCheck(checks []Checker) []Checker {
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checks = append(checks, SwapCheck{})
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return checks
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}
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// addExecChecks adds checks that verify if certain binaries are in PATH
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func addExecChecks(checks []Checker, execer utilsexec.Interface) []Checker {
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checks = append(checks,
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InPathCheck{executable: "crictl", mandatory: true, exec: execer},
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InPathCheck{executable: "conntrack", mandatory: true, exec: execer},
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InPathCheck{executable: "ip", mandatory: true, exec: execer},
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InPathCheck{executable: "iptables", mandatory: true, exec: execer},
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InPathCheck{executable: "mount", mandatory: true, exec: execer},
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InPathCheck{executable: "nsenter", mandatory: true, exec: execer},
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InPathCheck{executable: "ebtables", mandatory: false, exec: execer},
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InPathCheck{executable: "ethtool", mandatory: false, exec: execer},
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InPathCheck{executable: "socat", mandatory: false, exec: execer},
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InPathCheck{executable: "tc", mandatory: false, exec: execer},
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InPathCheck{executable: "touch", mandatory: false, exec: execer})
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return checks
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}
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