deploy: add -automaxprocs to reduce CPU and memory resources

With the new `-automaxprocs` commandline parameter, Ceph-CSI will adjust
the GOMAXPROCS environment variable for the Golang runtime. The values
are based on the CPU quota that is given to the process. This can reduce
the number of threads that the Golang runtime spawns, which affects the
require amount of memory as well.

Updates: #5228
Signed-off-by: Niels de Vos <ndevos@ibm.com>

vendor/go.uber.org/automaxprocs/internal/runtime/cpu_quota_linux.go

@@ -0,0 +1,75 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+//go:build linux
+// +build linux
+
+package runtime
+
+import (
+	"errors"
+
+	cg "go.uber.org/automaxprocs/internal/cgroups"
+)
+
+// CPUQuotaToGOMAXPROCS converts the CPU quota applied to the calling process
+// to a valid GOMAXPROCS value. The quota is converted from float to int using round.
+// If round == nil, DefaultRoundFunc is used.
+func CPUQuotaToGOMAXPROCS(minValue int, round func(v float64) int) (int, CPUQuotaStatus, error) {
+	if round == nil {
+		round = DefaultRoundFunc
+	}
+	cgroups, err := _newQueryer()
+	if err != nil {
+		return -1, CPUQuotaUndefined, err
+	}
+
+	quota, defined, err := cgroups.CPUQuota()
+	if !defined || err != nil {
+		return -1, CPUQuotaUndefined, err
+	}
+
+	maxProcs := round(quota)
+	if minValue > 0 && maxProcs < minValue {
+		return minValue, CPUQuotaMinUsed, nil
+	}
+	return maxProcs, CPUQuotaUsed, nil
+}
+
+type queryer interface {
+	CPUQuota() (float64, bool, error)
+}
+
+var (
+	_newCgroups2 = cg.NewCGroups2ForCurrentProcess
+	_newCgroups  = cg.NewCGroupsForCurrentProcess
+	_newQueryer  = newQueryer
+)
+
+func newQueryer() (queryer, error) {
+	cgroups, err := _newCgroups2()
+	if err == nil {
+		return cgroups, nil
+	}
+	if errors.Is(err, cg.ErrNotV2) {
+		return _newCgroups()
+	}
+	return nil, err
+}

vendor/go.uber.org/automaxprocs/internal/runtime/cpu_quota_unsupported.go

@@ -0,0 +1,31 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+//go:build !linux
+// +build !linux
+
+package runtime
+
+// CPUQuotaToGOMAXPROCS converts the CPU quota applied to the calling process
+// to a valid GOMAXPROCS value. This is Linux-specific and not supported in the
+// current OS.
+func CPUQuotaToGOMAXPROCS(_ int, _ func(v float64) int) (int, CPUQuotaStatus, error) {
+	return -1, CPUQuotaUndefined, nil
+}

vendor/go.uber.org/automaxprocs/internal/runtime/runtime.go

@@ -0,0 +1,40 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package runtime
+
+import "math"
+
+// CPUQuotaStatus presents the status of how CPU quota is used
+type CPUQuotaStatus int
+
+const (
+	// CPUQuotaUndefined is returned when CPU quota is undefined
+	CPUQuotaUndefined CPUQuotaStatus = iota
+	// CPUQuotaUsed is returned when a valid CPU quota can be used
+	CPUQuotaUsed
+	// CPUQuotaMinUsed is returned when CPU quota is smaller than the min value
+	CPUQuotaMinUsed
+)
+
+// DefaultRoundFunc is the default function to convert CPU quota from float to int. It rounds the value down (floor).
+func DefaultRoundFunc(v float64) int {
+	return int(math.Floor(v))
+}