322 lines
12 KiB
Go
322 lines
12 KiB
Go
// +build linux
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package daemon // import "github.com/docker/docker/daemon"
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"testing"
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containertypes "github.com/docker/docker/api/types/container"
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"github.com/docker/docker/container"
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"github.com/docker/docker/daemon/config"
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"github.com/docker/docker/oci"
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"github.com/docker/docker/pkg/idtools"
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"github.com/docker/docker/pkg/mount"
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"gotest.tools/assert"
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is "gotest.tools/assert/cmp"
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)
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const mountsFixture = `142 78 0:38 / / rw,relatime - aufs none rw,si=573b861da0b3a05b,dio
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143 142 0:60 / /proc rw,nosuid,nodev,noexec,relatime - proc proc rw
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144 142 0:67 / /dev rw,nosuid - tmpfs tmpfs rw,mode=755
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145 144 0:78 / /dev/pts rw,nosuid,noexec,relatime - devpts devpts rw,gid=5,mode=620,ptmxmode=666
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146 144 0:49 / /dev/mqueue rw,nosuid,nodev,noexec,relatime - mqueue mqueue rw
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147 142 0:84 / /sys rw,nosuid,nodev,noexec,relatime - sysfs sysfs rw
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148 147 0:86 / /sys/fs/cgroup rw,nosuid,nodev,noexec,relatime - tmpfs tmpfs rw,mode=755
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149 148 0:22 /docker/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,cpuset
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150 148 0:25 /docker/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a /sys/fs/cgroup/cpu rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,cpu
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151 148 0:27 /docker/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a /sys/fs/cgroup/cpuacct rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,cpuacct
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152 148 0:28 /docker/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,memory
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153 148 0:29 /docker/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a /sys/fs/cgroup/devices rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,devices
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154 148 0:30 /docker/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a /sys/fs/cgroup/freezer rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,freezer
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155 148 0:31 /docker/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a /sys/fs/cgroup/blkio rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,blkio
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156 148 0:32 /docker/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a /sys/fs/cgroup/perf_event rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,perf_event
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157 148 0:33 /docker/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a /sys/fs/cgroup/hugetlb rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,hugetlb
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158 148 0:35 /docker/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime - cgroup systemd rw,name=systemd
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159 142 8:4 /home/mlaventure/gopath /home/mlaventure/gopath rw,relatime - ext4 /dev/disk/by-uuid/d99e196c-1fc4-4b4f-bab9-9962b2b34e99 rw,errors=remount-ro,data=ordered
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160 142 8:4 /var/lib/docker/volumes/9a428b651ee4c538130143cad8d87f603a4bf31b928afe7ff3ecd65480692b35/_data /var/lib/docker rw,relatime - ext4 /dev/disk/by-uuid/d99e196c-1fc4-4b4f-bab9-9962b2b34e99 rw,errors=remount-ro,data=ordered
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164 142 8:4 /home/mlaventure/gopath/src/github.com/docker/docker /go/src/github.com/docker/docker rw,relatime - ext4 /dev/disk/by-uuid/d99e196c-1fc4-4b4f-bab9-9962b2b34e99 rw,errors=remount-ro,data=ordered
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165 142 8:4 /var/lib/docker/containers/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a/resolv.conf /etc/resolv.conf rw,relatime - ext4 /dev/disk/by-uuid/d99e196c-1fc4-4b4f-bab9-9962b2b34e99 rw,errors=remount-ro,data=ordered
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166 142 8:4 /var/lib/docker/containers/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a/hostname /etc/hostname rw,relatime - ext4 /dev/disk/by-uuid/d99e196c-1fc4-4b4f-bab9-9962b2b34e99 rw,errors=remount-ro,data=ordered
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167 142 8:4 /var/lib/docker/containers/5425782a95e643181d8a485a2bab3c0bb21f51d7dfc03511f0e6fbf3f3aa356a/hosts /etc/hosts rw,relatime - ext4 /dev/disk/by-uuid/d99e196c-1fc4-4b4f-bab9-9962b2b34e99 rw,errors=remount-ro,data=ordered
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168 144 0:39 / /dev/shm rw,nosuid,nodev,noexec,relatime - tmpfs shm rw,size=65536k
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169 144 0:12 /14 /dev/console rw,nosuid,noexec,relatime - devpts devpts rw,gid=5,mode=620,ptmxmode=000
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83 147 0:10 / /sys/kernel/security rw,relatime - securityfs none rw
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89 142 0:87 / /tmp rw,relatime - tmpfs none rw
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97 142 0:60 / /run/docker/netns/default rw,nosuid,nodev,noexec,relatime - proc proc rw
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100 160 8:4 /var/lib/docker/volumes/9a428b651ee4c538130143cad8d87f603a4bf31b928afe7ff3ecd65480692b35/_data/aufs /var/lib/docker/aufs rw,relatime - ext4 /dev/disk/by-uuid/d99e196c-1fc4-4b4f-bab9-9962b2b34e99 rw,errors=remount-ro,data=ordered
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115 100 0:102 / /var/lib/docker/aufs/mnt/0ecda1c63e5b58b3d89ff380bf646c95cc980252cf0b52466d43619aec7c8432 rw,relatime - aufs none rw,si=573b861dbc01905b,dio
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116 160 0:107 / /var/lib/docker/containers/d045dc441d2e2e1d5b3e328d47e5943811a40819fb47497c5f5a5df2d6d13c37/shm rw,nosuid,nodev,noexec,relatime - tmpfs shm rw,size=65536k
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118 142 0:102 / /run/docker/libcontainerd/d045dc441d2e2e1d5b3e328d47e5943811a40819fb47497c5f5a5df2d6d13c37/rootfs rw,relatime - aufs none rw,si=573b861dbc01905b,dio
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242 142 0:60 / /run/docker/netns/c3664df2a0f7 rw,nosuid,nodev,noexec,relatime - proc proc rw
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120 100 0:122 / /var/lib/docker/aufs/mnt/03ca4b49e71f1e49a41108829f4d5c70ac95934526e2af8984a1f65f1de0715d rw,relatime - aufs none rw,si=573b861eb147805b,dio
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171 142 0:122 / /run/docker/libcontainerd/e406ff6f3e18516d50e03dbca4de54767a69a403a6f7ec1edc2762812824521e/rootfs rw,relatime - aufs none rw,si=573b861eb147805b,dio
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310 142 0:60 / /run/docker/netns/71a18572176b rw,nosuid,nodev,noexec,relatime - proc proc rw
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`
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func TestCleanupMounts(t *testing.T) {
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d := &Daemon{
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root: "/var/lib/docker/",
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}
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expected := "/var/lib/docker/containers/d045dc441d2e2e1d5b3e328d47e5943811a40819fb47497c5f5a5df2d6d13c37/shm"
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var unmounted int
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unmount := func(target string) error {
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if target == expected {
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unmounted++
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}
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return nil
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}
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d.cleanupMountsFromReaderByID(strings.NewReader(mountsFixture), "", unmount)
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if unmounted != 1 {
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t.Fatal("Expected to unmount the shm (and the shm only)")
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}
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}
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func TestCleanupMountsByID(t *testing.T) {
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d := &Daemon{
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root: "/var/lib/docker/",
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}
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expected := "/var/lib/docker/aufs/mnt/03ca4b49e71f1e49a41108829f4d5c70ac95934526e2af8984a1f65f1de0715d"
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var unmounted int
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unmount := func(target string) error {
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if target == expected {
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unmounted++
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}
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return nil
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}
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d.cleanupMountsFromReaderByID(strings.NewReader(mountsFixture), "03ca4b49e71f1e49a41108829f4d5c70ac95934526e2af8984a1f65f1de0715d", unmount)
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if unmounted != 1 {
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t.Fatal("Expected to unmount the auf root (and that only)")
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}
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}
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func TestNotCleanupMounts(t *testing.T) {
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d := &Daemon{
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repository: "",
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}
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var unmounted bool
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unmount := func(target string) error {
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unmounted = true
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return nil
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}
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mountInfo := `234 232 0:59 / /dev/shm rw,nosuid,nodev,noexec,relatime - tmpfs shm rw,size=65536k`
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d.cleanupMountsFromReaderByID(strings.NewReader(mountInfo), "", unmount)
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if unmounted {
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t.Fatal("Expected not to clean up /dev/shm")
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}
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}
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// TestTmpfsDevShmSizeOverride checks that user-specified /dev/tmpfs mount
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// size is not overridden by the default shmsize (that should only be used
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// for default /dev/shm (as in "shareable" and "private" ipc modes).
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// https://github.com/moby/moby/issues/35271
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func TestTmpfsDevShmSizeOverride(t *testing.T) {
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size := "777m"
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mnt := "/dev/shm"
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d := Daemon{
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idMappings: &idtools.IDMappings{},
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}
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c := &container.Container{
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HostConfig: &containertypes.HostConfig{
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ShmSize: 48 * 1024, // size we should NOT end up with
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},
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}
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ms := []container.Mount{
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{
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Source: "tmpfs",
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Destination: mnt,
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Data: "size=" + size,
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},
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}
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// convert ms to spec
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spec := oci.DefaultSpec()
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err := setMounts(&d, &spec, c, ms)
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assert.Check(t, err)
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// Check the resulting spec for the correct size
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found := false
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for _, m := range spec.Mounts {
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if m.Destination == mnt {
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for _, o := range m.Options {
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if !strings.HasPrefix(o, "size=") {
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continue
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}
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t.Logf("%+v\n", m.Options)
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assert.Check(t, is.Equal("size="+size, o))
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found = true
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}
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}
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}
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if !found {
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t.Fatal("/dev/shm not found in spec, or size option missing")
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}
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}
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func TestValidateContainerIsolationLinux(t *testing.T) {
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d := Daemon{}
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_, err := d.verifyContainerSettings("linux", &containertypes.HostConfig{Isolation: containertypes.IsolationHyperV}, nil, false)
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assert.Check(t, is.Error(err, "invalid isolation 'hyperv' on linux"))
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}
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func TestShouldUnmountRoot(t *testing.T) {
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for _, test := range []struct {
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desc string
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root string
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info *mount.Info
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expect bool
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}{
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{
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desc: "root is at /",
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root: "/docker",
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info: &mount.Info{Root: "/docker", Mountpoint: "/docker"},
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expect: true,
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},
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{
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desc: "root is at in a submount from `/`",
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root: "/foo/docker",
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info: &mount.Info{Root: "/docker", Mountpoint: "/foo/docker"},
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expect: true,
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},
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{
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desc: "root is mounted in from a parent mount namespace same root dir", // dind is an example of this
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root: "/docker",
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info: &mount.Info{Root: "/docker/volumes/1234657/_data", Mountpoint: "/docker"},
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expect: false,
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},
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} {
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t.Run(test.desc, func(t *testing.T) {
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for _, options := range []struct {
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desc string
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Optional string
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expect bool
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}{
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{desc: "shared", Optional: "shared:", expect: true},
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{desc: "slave", Optional: "slave:", expect: false},
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{desc: "private", Optional: "private:", expect: false},
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} {
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t.Run(options.desc, func(t *testing.T) {
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expect := options.expect
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if expect {
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expect = test.expect
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}
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if test.info != nil {
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test.info.Optional = options.Optional
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}
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assert.Check(t, is.Equal(expect, shouldUnmountRoot(test.root, test.info)))
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})
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}
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})
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}
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}
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func checkMounted(t *testing.T, p string, expect bool) {
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t.Helper()
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mounted, err := mount.Mounted(p)
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assert.Check(t, err)
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assert.Check(t, mounted == expect, "expected %v, actual %v", expect, mounted)
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}
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func TestRootMountCleanup(t *testing.T) {
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if os.Getuid() != 0 {
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t.Skip("root required")
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}
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t.Parallel()
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testRoot, err := ioutil.TempDir("", t.Name())
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assert.Assert(t, err)
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defer os.RemoveAll(testRoot)
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cfg := &config.Config{}
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err = mount.MakePrivate(testRoot)
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assert.Assert(t, err)
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defer mount.Unmount(testRoot)
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cfg.ExecRoot = filepath.Join(testRoot, "exec")
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cfg.Root = filepath.Join(testRoot, "daemon")
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err = os.Mkdir(cfg.ExecRoot, 0755)
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assert.Assert(t, err)
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err = os.Mkdir(cfg.Root, 0755)
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assert.Assert(t, err)
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d := &Daemon{configStore: cfg, root: cfg.Root}
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unmountFile := getUnmountOnShutdownPath(cfg)
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t.Run("regular dir no mountpoint", func(t *testing.T) {
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err = setupDaemonRootPropagation(cfg)
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assert.Assert(t, err)
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_, err = os.Stat(unmountFile)
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assert.Assert(t, err)
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checkMounted(t, cfg.Root, true)
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assert.Assert(t, d.cleanupMounts())
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checkMounted(t, cfg.Root, false)
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_, err = os.Stat(unmountFile)
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assert.Assert(t, os.IsNotExist(err))
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})
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t.Run("root is a private mountpoint", func(t *testing.T) {
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err = mount.MakePrivate(cfg.Root)
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assert.Assert(t, err)
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defer mount.Unmount(cfg.Root)
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err = setupDaemonRootPropagation(cfg)
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assert.Assert(t, err)
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assert.Check(t, ensureShared(cfg.Root))
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_, err = os.Stat(unmountFile)
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assert.Assert(t, os.IsNotExist(err))
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assert.Assert(t, d.cleanupMounts())
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checkMounted(t, cfg.Root, true)
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})
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// mount is pre-configured with a shared mount
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t.Run("root is a shared mountpoint", func(t *testing.T) {
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err = mount.MakeShared(cfg.Root)
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assert.Assert(t, err)
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defer mount.Unmount(cfg.Root)
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err = setupDaemonRootPropagation(cfg)
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assert.Assert(t, err)
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if _, err := os.Stat(unmountFile); err == nil {
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t.Fatal("unmount file should not exist")
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}
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assert.Assert(t, d.cleanupMounts())
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checkMounted(t, cfg.Root, true)
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assert.Assert(t, mount.Unmount(cfg.Root))
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})
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// does not need mount but unmount file exists from previous run
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t.Run("old mount file is cleaned up on setup if not needed", func(t *testing.T) {
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err = mount.MakeShared(testRoot)
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assert.Assert(t, err)
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defer mount.MakePrivate(testRoot)
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err = ioutil.WriteFile(unmountFile, nil, 0644)
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assert.Assert(t, err)
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err = setupDaemonRootPropagation(cfg)
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assert.Assert(t, err)
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_, err = os.Stat(unmountFile)
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assert.Check(t, os.IsNotExist(err), err)
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checkMounted(t, cfg.Root, false)
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assert.Assert(t, d.cleanupMounts())
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})
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}
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