new "image" mount type

Add a new "image" mount type to `--mount`.  The source of the mount is
the name or ID of an image.  The destination is the path inside the
container.  Image mounts further support an optional `rw,readwrite`
parameter which if set to "true" will yield the mount writable inside
the container.  Note that no changes are propagated to the image mount
on the host (which in any case is read only).

Mounts are overlay mounts.  To support read-only overlay mounts, vendor
a non-release version of Buildah.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

1 files changed, 0 insertions, 210 deletions

diff --git a/vendor/github.com/prometheus/procfs/vm.go b/vendor/github.com/prometheus/procfs/vm.go
deleted file mode 100644
index cb1389141..000000000
--- a/vendor/github.com/prometheus/procfs/vm.go
+++ /dev/null
@@ -1,210 +0,0 @@
-// Copyright 2019 The Prometheus 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.
-
-// +build !windows
-
-package procfs
-
-import (
-	"fmt"
-	"io/ioutil"
-	"os"
-	"path/filepath"
-	"strings"
-
-	"github.com/prometheus/procfs/internal/util"
-)
-
-// The VM interface is described at
-//   https://www.kernel.org/doc/Documentation/sysctl/vm.txt
-// Each setting is exposed as a single file.
-// Each file contains one line with a single numerical value, except lowmem_reserve_ratio which holds an array
-// and numa_zonelist_order (deprecated) which is a string
-type VM struct {
-	AdminReserveKbytes        *int64   // /proc/sys/vm/admin_reserve_kbytes
-	BlockDump                 *int64   // /proc/sys/vm/block_dump
-	CompactUnevictableAllowed *int64   // /proc/sys/vm/compact_unevictable_allowed
-	DirtyBackgroundBytes      *int64   // /proc/sys/vm/dirty_background_bytes
-	DirtyBackgroundRatio      *int64   // /proc/sys/vm/dirty_background_ratio
-	DirtyBytes                *int64   // /proc/sys/vm/dirty_bytes
-	DirtyExpireCentisecs      *int64   // /proc/sys/vm/dirty_expire_centisecs
-	DirtyRatio                *int64   // /proc/sys/vm/dirty_ratio
-	DirtytimeExpireSeconds    *int64   // /proc/sys/vm/dirtytime_expire_seconds
-	DirtyWritebackCentisecs   *int64   // /proc/sys/vm/dirty_writeback_centisecs
-	DropCaches                *int64   // /proc/sys/vm/drop_caches
-	ExtfragThreshold          *int64   // /proc/sys/vm/extfrag_threshold
-	HugetlbShmGroup           *int64   // /proc/sys/vm/hugetlb_shm_group
-	LaptopMode                *int64   // /proc/sys/vm/laptop_mode
-	LegacyVaLayout            *int64   // /proc/sys/vm/legacy_va_layout
-	LowmemReserveRatio        []*int64 // /proc/sys/vm/lowmem_reserve_ratio
-	MaxMapCount               *int64   // /proc/sys/vm/max_map_count
-	MemoryFailureEarlyKill    *int64   // /proc/sys/vm/memory_failure_early_kill
-	MemoryFailureRecovery     *int64   // /proc/sys/vm/memory_failure_recovery
-	MinFreeKbytes             *int64   // /proc/sys/vm/min_free_kbytes
-	MinSlabRatio              *int64   // /proc/sys/vm/min_slab_ratio
-	MinUnmappedRatio          *int64   // /proc/sys/vm/min_unmapped_ratio
-	MmapMinAddr               *int64   // /proc/sys/vm/mmap_min_addr
-	NrHugepages               *int64   // /proc/sys/vm/nr_hugepages
-	NrHugepagesMempolicy      *int64   // /proc/sys/vm/nr_hugepages_mempolicy
-	NrOvercommitHugepages     *int64   // /proc/sys/vm/nr_overcommit_hugepages
-	NumaStat                  *int64   // /proc/sys/vm/numa_stat
-	NumaZonelistOrder         string   // /proc/sys/vm/numa_zonelist_order
-	OomDumpTasks              *int64   // /proc/sys/vm/oom_dump_tasks
-	OomKillAllocatingTask     *int64   // /proc/sys/vm/oom_kill_allocating_task
-	OvercommitKbytes          *int64   // /proc/sys/vm/overcommit_kbytes
-	OvercommitMemory          *int64   // /proc/sys/vm/overcommit_memory
-	OvercommitRatio           *int64   // /proc/sys/vm/overcommit_ratio
-	PageCluster               *int64   // /proc/sys/vm/page-cluster
-	PanicOnOom                *int64   // /proc/sys/vm/panic_on_oom
-	PercpuPagelistFraction    *int64   // /proc/sys/vm/percpu_pagelist_fraction
-	StatInterval              *int64   // /proc/sys/vm/stat_interval
-	Swappiness                *int64   // /proc/sys/vm/swappiness
-	UserReserveKbytes         *int64   // /proc/sys/vm/user_reserve_kbytes
-	VfsCachePressure          *int64   // /proc/sys/vm/vfs_cache_pressure
-	WatermarkBoostFactor      *int64   // /proc/sys/vm/watermark_boost_factor
-	WatermarkScaleFactor      *int64   // /proc/sys/vm/watermark_scale_factor
-	ZoneReclaimMode           *int64   // /proc/sys/vm/zone_reclaim_mode
-}
-
-// VM reads the VM statistics from the specified `proc` filesystem.
-func (fs FS) VM() (*VM, error) {
-	path := fs.proc.Path("sys/vm")
-	file, err := os.Stat(path)
-	if err != nil {
-		return nil, err
-	}
-	if !file.Mode().IsDir() {
-		return nil, fmt.Errorf("%s is not a directory", path)
-	}
-
-	files, err := ioutil.ReadDir(path)
-	if err != nil {
-		return nil, err
-	}
-
-	var vm VM
-	for _, f := range files {
-		if f.IsDir() {
-			continue
-		}
-
-		name := filepath.Join(path, f.Name())
-		// ignore errors on read, as there are some write only
-		// in /proc/sys/vm
-		value, err := util.SysReadFile(name)
-		if err != nil {
-			continue
-		}
-		vp := util.NewValueParser(value)
-
-		switch f.Name() {
-		case "admin_reserve_kbytes":
-			vm.AdminReserveKbytes = vp.PInt64()
-		case "block_dump":
-			vm.BlockDump = vp.PInt64()
-		case "compact_unevictable_allowed":
-			vm.CompactUnevictableAllowed = vp.PInt64()
-		case "dirty_background_bytes":
-			vm.DirtyBackgroundBytes = vp.PInt64()
-		case "dirty_background_ratio":
-			vm.DirtyBackgroundRatio = vp.PInt64()
-		case "dirty_bytes":
-			vm.DirtyBytes = vp.PInt64()
-		case "dirty_expire_centisecs":
-			vm.DirtyExpireCentisecs = vp.PInt64()
-		case "dirty_ratio":
-			vm.DirtyRatio = vp.PInt64()
-		case "dirtytime_expire_seconds":
-			vm.DirtytimeExpireSeconds = vp.PInt64()
-		case "dirty_writeback_centisecs":
-			vm.DirtyWritebackCentisecs = vp.PInt64()
-		case "drop_caches":
-			vm.DropCaches = vp.PInt64()
-		case "extfrag_threshold":
-			vm.ExtfragThreshold = vp.PInt64()
-		case "hugetlb_shm_group":
-			vm.HugetlbShmGroup = vp.PInt64()
-		case "laptop_mode":
-			vm.LaptopMode = vp.PInt64()
-		case "legacy_va_layout":
-			vm.LegacyVaLayout = vp.PInt64()
-		case "lowmem_reserve_ratio":
-			stringSlice := strings.Fields(value)
-			pint64Slice := make([]*int64, 0, len(stringSlice))
-			for _, value := range stringSlice {
-				vp := util.NewValueParser(value)
-				pint64Slice = append(pint64Slice, vp.PInt64())
-			}
-			vm.LowmemReserveRatio = pint64Slice
-		case "max_map_count":
-			vm.MaxMapCount = vp.PInt64()
-		case "memory_failure_early_kill":
-			vm.MemoryFailureEarlyKill = vp.PInt64()
-		case "memory_failure_recovery":
-			vm.MemoryFailureRecovery = vp.PInt64()
-		case "min_free_kbytes":
-			vm.MinFreeKbytes = vp.PInt64()
-		case "min_slab_ratio":
-			vm.MinSlabRatio = vp.PInt64()
-		case "min_unmapped_ratio":
-			vm.MinUnmappedRatio = vp.PInt64()
-		case "mmap_min_addr":
-			vm.MmapMinAddr = vp.PInt64()
-		case "nr_hugepages":
-			vm.NrHugepages = vp.PInt64()
-		case "nr_hugepages_mempolicy":
-			vm.NrHugepagesMempolicy = vp.PInt64()
-		case "nr_overcommit_hugepages":
-			vm.NrOvercommitHugepages = vp.PInt64()
-		case "numa_stat":
-			vm.NumaStat = vp.PInt64()
-		case "numa_zonelist_order":
-			vm.NumaZonelistOrder = value
-		case "oom_dump_tasks":
-			vm.OomDumpTasks = vp.PInt64()
-		case "oom_kill_allocating_task":
-			vm.OomKillAllocatingTask = vp.PInt64()
-		case "overcommit_kbytes":
-			vm.OvercommitKbytes = vp.PInt64()
-		case "overcommit_memory":
-			vm.OvercommitMemory = vp.PInt64()
-		case "overcommit_ratio":
-			vm.OvercommitRatio = vp.PInt64()
-		case "page-cluster":
-			vm.PageCluster = vp.PInt64()
-		case "panic_on_oom":
-			vm.PanicOnOom = vp.PInt64()
-		case "percpu_pagelist_fraction":
-			vm.PercpuPagelistFraction = vp.PInt64()
-		case "stat_interval":
-			vm.StatInterval = vp.PInt64()
-		case "swappiness":
-			vm.Swappiness = vp.PInt64()
-		case "user_reserve_kbytes":
-			vm.UserReserveKbytes = vp.PInt64()
-		case "vfs_cache_pressure":
-			vm.VfsCachePressure = vp.PInt64()
-		case "watermark_boost_factor":
-			vm.WatermarkBoostFactor = vp.PInt64()
-		case "watermark_scale_factor":
-			vm.WatermarkScaleFactor = vp.PInt64()
-		case "zone_reclaim_mode":
-			vm.ZoneReclaimMode = vp.PInt64()
-		}
-		if err := vp.Err(); err != nil {
-			return nil, err
-		}
-	}
-
-	return &vm, nil
-}