82 lines
3.3 KiB
Go
82 lines
3.3 KiB
Go
// Copyright 2018 Google LLC
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package boot
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import (
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"fmt"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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"gvisor.googlesource.com/gvisor/pkg/sentry/limits"
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)
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// Mapping from linux resource names to limits.LimitType.
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var fromLinuxResource = map[string]limits.LimitType{
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"RLIMIT_AS": limits.AS,
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"RLIMIT_CORE": limits.Core,
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"RLIMIT_CPU": limits.CPU,
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"RLIMIT_DATA": limits.Data,
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"RLIMIT_FSIZE": limits.FileSize,
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"RLIMIT_LOCKS": limits.Locks,
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"RLIMIT_MEMLOCK": limits.MemoryLocked,
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"RLIMIT_MSGQUEUE": limits.MessageQueueBytes,
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"RLIMIT_NICE": limits.Nice,
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"RLIMIT_NOFILE": limits.NumberOfFiles,
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"RLIMIT_NPROC": limits.ProcessCount,
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"RLIMIT_RSS": limits.Rss,
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"RLIMIT_RTPRIO": limits.RealTimePriority,
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"RLIMIT_RTTIME": limits.Rttime,
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"RLIMIT_SIGPENDING": limits.SignalsPending,
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"RLIMIT_STACK": limits.Stack,
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}
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func createLimitSet(spec *specs.Spec) (*limits.LimitSet, error) {
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ls, err := limits.NewLinuxLimitSet()
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if err != nil {
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return nil, err
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}
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// Set default limits based on what containers get by default, ex:
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// $ docker run --rm debian prlimit
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ls.SetUnchecked(limits.AS, limits.Limit{Cur: limits.Infinity, Max: limits.Infinity})
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ls.SetUnchecked(limits.Core, limits.Limit{Cur: limits.Infinity, Max: limits.Infinity})
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ls.SetUnchecked(limits.CPU, limits.Limit{Cur: limits.Infinity, Max: limits.Infinity})
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ls.SetUnchecked(limits.Data, limits.Limit{Cur: limits.Infinity, Max: limits.Infinity})
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ls.SetUnchecked(limits.FileSize, limits.Limit{Cur: limits.Infinity, Max: limits.Infinity})
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ls.SetUnchecked(limits.Locks, limits.Limit{Cur: limits.Infinity, Max: limits.Infinity})
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ls.SetUnchecked(limits.MemoryLocked, limits.Limit{Cur: 65536, Max: 65536})
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ls.SetUnchecked(limits.MessageQueueBytes, limits.Limit{Cur: 819200, Max: 819200})
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ls.SetUnchecked(limits.Nice, limits.Limit{Cur: 0, Max: 0})
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ls.SetUnchecked(limits.NumberOfFiles, limits.Limit{Cur: 1048576, Max: 1048576})
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ls.SetUnchecked(limits.ProcessCount, limits.Limit{Cur: limits.Infinity, Max: limits.Infinity})
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ls.SetUnchecked(limits.Rss, limits.Limit{Cur: limits.Infinity, Max: limits.Infinity})
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ls.SetUnchecked(limits.RealTimePriority, limits.Limit{Cur: 0, Max: 0})
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ls.SetUnchecked(limits.Rttime, limits.Limit{Cur: limits.Infinity, Max: limits.Infinity})
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ls.SetUnchecked(limits.SignalsPending, limits.Limit{Cur: 0, Max: 0})
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ls.SetUnchecked(limits.Stack, limits.Limit{Cur: 8388608, Max: limits.Infinity})
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// Then apply overwrites on top of defaults.
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for _, rl := range spec.Process.Rlimits {
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lt, ok := fromLinuxResource[rl.Type]
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if !ok {
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return nil, fmt.Errorf("unknown resource %q", rl.Type)
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}
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ls.SetUnchecked(lt, limits.Limit{
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Cur: rl.Soft,
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Max: rl.Hard,
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})
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}
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return ls, nil
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}
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