mirror of
https://github.com/kemko/nomad.git
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11a5f79084
The exec driver and other drivers derived from the shared executor check the path of the command before handing off to libcontainer to ensure that the command doesn't escape the sandbox. But we don't check any host volume mounts, which should be safe to use as a source for executables if we're letting the user mount them to the container in the first place. Check the mount config to verify the executable lives in the mount's host path, but then return an absolute path within the mount's task path so that we can hand that off to libcontainer to run. Includes a good bit of refactoring here because the anchoring of the final task path has different code paths for inside the task dir vs inside a mount. But I've fleshed out the test coverage of this a good bit to ensure we haven't created any regressions in the process.
863 lines
24 KiB
Go
863 lines
24 KiB
Go
package executor
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import (
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"context"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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"testing"
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"time"
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"github.com/hashicorp/nomad/ci"
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"github.com/hashicorp/nomad/client/allocdir"
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"github.com/hashicorp/nomad/client/lib/cgutil"
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"github.com/hashicorp/nomad/client/taskenv"
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"github.com/hashicorp/nomad/client/testutil"
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"github.com/hashicorp/nomad/drivers/shared/capabilities"
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"github.com/hashicorp/nomad/helper/testlog"
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"github.com/hashicorp/nomad/nomad/mock"
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"github.com/hashicorp/nomad/plugins/drivers"
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tu "github.com/hashicorp/nomad/testutil"
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"github.com/opencontainers/runc/libcontainer/cgroups"
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lconfigs "github.com/opencontainers/runc/libcontainer/configs"
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"github.com/opencontainers/runc/libcontainer/devices"
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"github.com/shoenig/test"
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"github.com/shoenig/test/must"
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"github.com/stretchr/testify/require"
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"golang.org/x/sys/unix"
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)
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func init() {
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executorFactories["LibcontainerExecutor"] = libcontainerFactory
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}
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var libcontainerFactory = executorFactory{
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new: NewExecutorWithIsolation,
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configureExecCmd: func(t *testing.T, cmd *ExecCommand) {
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cmd.ResourceLimits = true
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setupRootfs(t, cmd.TaskDir)
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},
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}
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// testExecutorContextWithChroot returns an ExecutorContext and AllocDir with
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// chroot. Use testExecutorContext if you don't need a chroot.
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//
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// The caller is responsible for calling AllocDir.Destroy() to cleanup.
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func testExecutorCommandWithChroot(t *testing.T) *testExecCmd {
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chrootEnv := map[string]string{
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"/etc/ld.so.cache": "/etc/ld.so.cache",
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"/etc/ld.so.conf": "/etc/ld.so.conf",
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"/etc/ld.so.conf.d": "/etc/ld.so.conf.d",
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"/etc/passwd": "/etc/passwd",
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"/lib": "/lib",
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"/lib64": "/lib64",
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"/usr/lib": "/usr/lib",
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"/bin/ls": "/bin/ls",
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"/bin/cat": "/bin/cat",
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"/bin/echo": "/bin/echo",
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"/bin/bash": "/bin/bash",
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"/bin/sleep": "/bin/sleep",
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"/foobar": "/does/not/exist",
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}
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alloc := mock.Alloc()
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task := alloc.Job.TaskGroups[0].Tasks[0]
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taskEnv := taskenv.NewBuilder(mock.Node(), alloc, task, "global").Build()
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allocDir := allocdir.NewAllocDir(testlog.HCLogger(t), os.TempDir(), alloc.ID)
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if err := allocDir.Build(); err != nil {
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t.Fatalf("AllocDir.Build() failed: %v", err)
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}
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if err := allocDir.NewTaskDir(task.Name).Build(true, chrootEnv); err != nil {
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allocDir.Destroy()
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t.Fatalf("allocDir.NewTaskDir(%q) failed: %v", task.Name, err)
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}
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td := allocDir.TaskDirs[task.Name]
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cmd := &ExecCommand{
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Env: taskEnv.List(),
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TaskDir: td.Dir,
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Resources: &drivers.Resources{
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NomadResources: alloc.AllocatedResources.Tasks[task.Name],
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},
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}
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if cgutil.UseV2 {
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cmd.Resources.LinuxResources = &drivers.LinuxResources{
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CpusetCgroupPath: filepath.Join(cgutil.CgroupRoot, "testing.scope", cgutil.CgroupScope(alloc.ID, task.Name)),
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}
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}
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testCmd := &testExecCmd{
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command: cmd,
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allocDir: allocDir,
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}
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configureTLogging(t, testCmd)
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return testCmd
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}
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func TestExecutor_configureNamespaces(t *testing.T) {
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ci.Parallel(t)
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t.Run("host host", func(t *testing.T) {
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require.Equal(t, lconfigs.Namespaces{
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{Type: lconfigs.NEWNS},
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}, configureNamespaces("host", "host"))
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})
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t.Run("host private", func(t *testing.T) {
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require.Equal(t, lconfigs.Namespaces{
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{Type: lconfigs.NEWNS},
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{Type: lconfigs.NEWIPC},
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}, configureNamespaces("host", "private"))
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})
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t.Run("private host", func(t *testing.T) {
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require.Equal(t, lconfigs.Namespaces{
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{Type: lconfigs.NEWNS},
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{Type: lconfigs.NEWPID},
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}, configureNamespaces("private", "host"))
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})
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t.Run("private private", func(t *testing.T) {
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require.Equal(t, lconfigs.Namespaces{
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{Type: lconfigs.NEWNS},
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{Type: lconfigs.NEWPID},
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{Type: lconfigs.NEWIPC},
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}, configureNamespaces("private", "private"))
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})
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}
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func TestExecutor_Isolation_PID_and_IPC_hostMode(t *testing.T) {
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ci.Parallel(t)
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r := require.New(t)
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testutil.ExecCompatible(t)
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testExecCmd := testExecutorCommandWithChroot(t)
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execCmd, allocDir := testExecCmd.command, testExecCmd.allocDir
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execCmd.Cmd = "/bin/ls"
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execCmd.Args = []string{"-F", "/", "/etc/"}
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defer allocDir.Destroy()
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execCmd.ResourceLimits = true
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execCmd.ModePID = "host" // disable PID namespace
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execCmd.ModeIPC = "host" // disable IPC namespace
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executor := NewExecutorWithIsolation(testlog.HCLogger(t))
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defer executor.Shutdown("SIGKILL", 0)
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ps, err := executor.Launch(execCmd)
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r.NoError(err)
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r.NotZero(ps.Pid)
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estate, err := executor.Wait(context.Background())
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r.NoError(err)
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r.Zero(estate.ExitCode)
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lexec, ok := executor.(*LibcontainerExecutor)
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r.True(ok)
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// Check that namespaces were applied to the container config
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config := lexec.container.Config()
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r.Contains(config.Namespaces, lconfigs.Namespace{Type: lconfigs.NEWNS})
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r.NotContains(config.Namespaces, lconfigs.Namespace{Type: lconfigs.NEWPID})
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r.NotContains(config.Namespaces, lconfigs.Namespace{Type: lconfigs.NEWIPC})
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// Shut down executor
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r.NoError(executor.Shutdown("", 0))
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executor.Wait(context.Background())
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}
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func TestExecutor_IsolationAndConstraints(t *testing.T) {
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ci.Parallel(t)
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testutil.ExecCompatible(t)
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testutil.CgroupsCompatibleV1(t) // todo(shoenig): hard codes cgroups v1 lookup
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r := require.New(t)
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testExecCmd := testExecutorCommandWithChroot(t)
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execCmd, allocDir := testExecCmd.command, testExecCmd.allocDir
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execCmd.Cmd = "/bin/ls"
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execCmd.Args = []string{"-F", "/", "/etc/"}
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defer allocDir.Destroy()
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execCmd.ResourceLimits = true
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execCmd.ModePID = "private"
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execCmd.ModeIPC = "private"
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executor := NewExecutorWithIsolation(testlog.HCLogger(t))
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defer executor.Shutdown("SIGKILL", 0)
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ps, err := executor.Launch(execCmd)
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r.NoError(err)
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r.NotZero(ps.Pid)
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estate, err := executor.Wait(context.Background())
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r.NoError(err)
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r.Zero(estate.ExitCode)
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lexec, ok := executor.(*LibcontainerExecutor)
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r.True(ok)
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// Check if the resource constraints were applied
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state, err := lexec.container.State()
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r.NoError(err)
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memLimits := filepath.Join(state.CgroupPaths["memory"], "memory.limit_in_bytes")
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data, err := ioutil.ReadFile(memLimits)
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r.NoError(err)
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expectedMemLim := strconv.Itoa(int(execCmd.Resources.NomadResources.Memory.MemoryMB * 1024 * 1024))
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actualMemLim := strings.TrimSpace(string(data))
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r.Equal(actualMemLim, expectedMemLim)
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// Check that namespaces were applied to the container config
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config := lexec.container.Config()
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r.Contains(config.Namespaces, lconfigs.Namespace{Type: lconfigs.NEWNS})
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r.Contains(config.Namespaces, lconfigs.Namespace{Type: lconfigs.NEWPID})
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r.Contains(config.Namespaces, lconfigs.Namespace{Type: lconfigs.NEWIPC})
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// Shut down executor
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r.NoError(executor.Shutdown("", 0))
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executor.Wait(context.Background())
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// Check if Nomad has actually removed the cgroups
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tu.WaitForResult(func() (bool, error) {
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_, err = os.Stat(memLimits)
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if err == nil {
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return false, fmt.Errorf("expected an error from os.Stat %s", memLimits)
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}
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return true, nil
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}, func(err error) { t.Error(err) })
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expected := `/:
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alloc/
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bin/
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dev/
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etc/
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lib/
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lib64/
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local/
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proc/
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secrets/
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sys/
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tmp/
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usr/
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/etc/:
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ld.so.cache
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ld.so.conf
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ld.so.conf.d/
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passwd`
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tu.WaitForResult(func() (bool, error) {
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output := testExecCmd.stdout.String()
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act := strings.TrimSpace(string(output))
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if act != expected {
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return false, fmt.Errorf("Command output incorrectly: want %v; got %v", expected, act)
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}
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return true, nil
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}, func(err error) { t.Error(err) })
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}
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// TestExecutor_CgroupPaths asserts that process starts with independent cgroups
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// hierarchy created for this process
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func TestExecutor_CgroupPaths(t *testing.T) {
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ci.Parallel(t)
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testutil.ExecCompatible(t)
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require := require.New(t)
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testExecCmd := testExecutorCommandWithChroot(t)
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execCmd, allocDir := testExecCmd.command, testExecCmd.allocDir
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execCmd.Cmd = "/bin/bash"
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execCmd.Args = []string{"-c", "sleep 0.2; cat /proc/self/cgroup"}
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defer allocDir.Destroy()
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execCmd.ResourceLimits = true
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executor := NewExecutorWithIsolation(testlog.HCLogger(t))
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defer executor.Shutdown("SIGKILL", 0)
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ps, err := executor.Launch(execCmd)
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require.NoError(err)
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require.NotZero(ps.Pid)
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state, err := executor.Wait(context.Background())
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require.NoError(err)
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require.Zero(state.ExitCode)
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tu.WaitForResult(func() (bool, error) {
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output := strings.TrimSpace(testExecCmd.stdout.String())
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switch cgutil.UseV2 {
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case true:
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isScope := strings.HasSuffix(output, ".scope")
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require.True(isScope)
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case false:
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// Verify that we got some cgroups
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if !strings.Contains(output, ":devices:") {
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return false, fmt.Errorf("was expected cgroup files but found:\n%v", output)
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}
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lines := strings.Split(output, "\n")
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for _, line := range lines {
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// Every cgroup entry should be /nomad/$ALLOC_ID
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if line == "" {
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continue
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}
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// Skip rdma & misc subsystem; rdma was added in most recent kernels and libcontainer/docker
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// don't isolate it by default.
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// :: filters out odd empty cgroup found in latest Ubuntu lines, e.g. 0::/user.slice/user-1000.slice/session-17.scope
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// that is also not used for isolation
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if strings.Contains(line, ":rdma:") || strings.Contains(line, ":misc:") || strings.Contains(line, "::") {
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continue
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}
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if !strings.Contains(line, ":/nomad/") {
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return false, fmt.Errorf("Not a member of the alloc's cgroup: expected=...:/nomad/... -- found=%q", line)
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}
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}
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}
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return true, nil
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}, func(err error) { t.Error(err) })
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}
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// TestExecutor_CgroupPaths asserts that all cgroups created for a task
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// are destroyed on shutdown
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func TestExecutor_CgroupPathsAreDestroyed(t *testing.T) {
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ci.Parallel(t)
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testutil.ExecCompatible(t)
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require := require.New(t)
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testExecCmd := testExecutorCommandWithChroot(t)
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execCmd, allocDir := testExecCmd.command, testExecCmd.allocDir
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execCmd.Cmd = "/bin/bash"
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execCmd.Args = []string{"-c", "sleep 0.2; cat /proc/self/cgroup"}
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defer allocDir.Destroy()
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execCmd.ResourceLimits = true
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executor := NewExecutorWithIsolation(testlog.HCLogger(t))
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defer executor.Shutdown("SIGKILL", 0)
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ps, err := executor.Launch(execCmd)
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require.NoError(err)
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require.NotZero(ps.Pid)
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state, err := executor.Wait(context.Background())
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require.NoError(err)
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require.Zero(state.ExitCode)
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var cgroupsPaths string
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tu.WaitForResult(func() (bool, error) {
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output := strings.TrimSpace(testExecCmd.stdout.String())
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switch cgutil.UseV2 {
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case true:
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isScope := strings.HasSuffix(output, ".scope")
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require.True(isScope)
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case false:
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// Verify that we got some cgroups
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if !strings.Contains(output, ":devices:") {
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return false, fmt.Errorf("was expected cgroup files but found:\n%v", output)
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}
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lines := strings.Split(output, "\n")
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for _, line := range lines {
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// Every cgroup entry should be /nomad/$ALLOC_ID
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if line == "" {
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continue
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}
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// Skip rdma subsystem; rdma was added in most recent kernels and libcontainer/docker
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// don't isolate it by default. And also misc.
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if strings.Contains(line, ":rdma:") || strings.Contains(line, "::") || strings.Contains(line, ":misc:") {
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continue
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}
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if !strings.Contains(line, ":/nomad/") {
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return false, fmt.Errorf("Not a member of the alloc's cgroup: expected=...:/nomad/... -- found=%q", line)
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}
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}
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}
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cgroupsPaths = output
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return true, nil
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}, func(err error) { t.Error(err) })
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// shutdown executor and test that cgroups are destroyed
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executor.Shutdown("SIGKILL", 0)
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// test that the cgroup paths are not visible
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tmpFile, err := ioutil.TempFile("", "")
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require.NoError(err)
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defer os.Remove(tmpFile.Name())
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_, err = tmpFile.WriteString(cgroupsPaths)
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require.NoError(err)
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tmpFile.Close()
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subsystems, err := cgroups.ParseCgroupFile(tmpFile.Name())
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require.NoError(err)
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for subsystem, cgroup := range subsystems {
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if subsystem == "" || !strings.Contains(cgroup, "nomad/") {
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continue
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}
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p, err := cgutil.GetCgroupPathHelperV1(subsystem, cgroup)
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require.NoError(err)
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require.Falsef(cgroups.PathExists(p), "cgroup for %s %s still exists", subsystem, cgroup)
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}
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}
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func TestExecutor_LookupTaskBin(t *testing.T) {
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ci.Parallel(t)
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// Create a temp dir
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taskDir := t.TempDir()
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mountDir := t.TempDir()
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// Create the command with mounts
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cmd := &ExecCommand{
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Env: []string{"PATH=/bin"},
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TaskDir: taskDir,
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Mounts: []*drivers.MountConfig{{TaskPath: "/srv", HostPath: mountDir}},
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}
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// Make a /foo /local/foo and /usr/local/bin subdirs under task dir
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// and /bar under mountdir
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must.NoError(t, os.MkdirAll(filepath.Join(taskDir, "foo"), 0700))
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must.NoError(t, os.MkdirAll(filepath.Join(taskDir, "local/foo"), 0700))
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must.NoError(t, os.MkdirAll(filepath.Join(taskDir, "usr/local/bin"), 0700))
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must.NoError(t, os.MkdirAll(filepath.Join(mountDir, "bar"), 0700))
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writeFile := func(paths ...string) {
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t.Helper()
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path := filepath.Join(paths...)
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must.NoError(t, os.WriteFile(path, []byte("hello"), 0o700))
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}
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// Write some files
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writeFile(taskDir, "usr/local/bin", "tmp0.txt") // under /usr/local/bin in taskdir
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writeFile(taskDir, "foo", "tmp1.txt") // under foo in taskdir
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writeFile(taskDir, "local", "tmp2.txt") // under root of task-local dir
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writeFile(taskDir, "local/foo", "tmp3.txt") // under foo in task-local dir
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writeFile(mountDir, "tmp4.txt") // under root of mount dir
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writeFile(mountDir, "bar/tmp5.txt") // under bar in mount dir
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testCases := []struct {
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name string
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cmd string
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expectErr string
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expectTaskPath string
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expectHostPath string
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}{
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{
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name: "lookup with file name in PATH",
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cmd: "tmp0.txt",
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expectTaskPath: "/usr/local/bin/tmp0.txt",
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expectHostPath: filepath.Join(taskDir, "usr/local/bin/tmp0.txt"),
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},
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{
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name: "lookup with absolute path to binary",
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cmd: "/foo/tmp1.txt",
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expectTaskPath: "/foo/tmp1.txt",
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expectHostPath: filepath.Join(taskDir, "foo/tmp1.txt"),
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},
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{
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name: "lookup in task local dir with absolute path to binary",
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cmd: "/local/tmp2.txt",
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expectTaskPath: "/local/tmp2.txt",
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expectHostPath: filepath.Join(taskDir, "local/tmp2.txt"),
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},
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{
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name: "lookup in task local dir with relative path to binary",
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cmd: "local/tmp2.txt",
|
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expectTaskPath: "/local/tmp2.txt",
|
|
expectHostPath: filepath.Join(taskDir, "local/tmp2.txt"),
|
|
},
|
|
{
|
|
name: "lookup in task local dir with file name",
|
|
cmd: "tmp2.txt",
|
|
expectTaskPath: "/local/tmp2.txt",
|
|
expectHostPath: filepath.Join(taskDir, "local/tmp2.txt"),
|
|
},
|
|
{
|
|
name: "lookup in task local subdir with absolute path to binary",
|
|
cmd: "/local/foo/tmp3.txt",
|
|
expectTaskPath: "/local/foo/tmp3.txt",
|
|
expectHostPath: filepath.Join(taskDir, "local/foo/tmp3.txt"),
|
|
},
|
|
{
|
|
name: "lookup host absolute path outside taskdir",
|
|
cmd: "/bin/sh",
|
|
expectErr: "file /bin/sh not found under path " + taskDir,
|
|
},
|
|
{
|
|
name: "lookup file from mount with absolute path",
|
|
cmd: "/srv/tmp4.txt",
|
|
expectTaskPath: "/srv/tmp4.txt",
|
|
expectHostPath: filepath.Join(mountDir, "tmp4.txt"),
|
|
},
|
|
{
|
|
name: "lookup file from mount with file name fails",
|
|
cmd: "tmp4.txt",
|
|
expectErr: "file tmp4.txt not found under path",
|
|
},
|
|
{
|
|
name: "lookup file from mount with subdir",
|
|
cmd: "/srv/bar/tmp5.txt",
|
|
expectTaskPath: "/srv/bar/tmp5.txt",
|
|
expectHostPath: filepath.Join(mountDir, "bar/tmp5.txt"),
|
|
},
|
|
}
|
|
|
|
for _, tc := range testCases {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
cmd.Cmd = tc.cmd
|
|
taskPath, hostPath, err := lookupTaskBin(cmd)
|
|
if tc.expectErr == "" {
|
|
must.NoError(t, err)
|
|
test.Eq(t, tc.expectTaskPath, taskPath)
|
|
test.Eq(t, tc.expectHostPath, hostPath)
|
|
} else {
|
|
test.EqError(t, err, tc.expectErr)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
// Exec Launch looks for the binary only inside the chroot
|
|
func TestExecutor_EscapeContainer(t *testing.T) {
|
|
ci.Parallel(t)
|
|
testutil.ExecCompatible(t)
|
|
testutil.CgroupsCompatibleV1(t) // todo(shoenig) kills the terminal, probably defaulting to /
|
|
|
|
require := require.New(t)
|
|
|
|
testExecCmd := testExecutorCommandWithChroot(t)
|
|
execCmd, allocDir := testExecCmd.command, testExecCmd.allocDir
|
|
execCmd.Cmd = "/bin/kill" // missing from the chroot container
|
|
defer allocDir.Destroy()
|
|
|
|
execCmd.ResourceLimits = true
|
|
|
|
executor := NewExecutorWithIsolation(testlog.HCLogger(t))
|
|
defer executor.Shutdown("SIGKILL", 0)
|
|
|
|
_, err := executor.Launch(execCmd)
|
|
require.Error(err)
|
|
require.Regexp("^file /bin/kill not found under path", err)
|
|
|
|
// Bare files are looked up using the system path, inside the container
|
|
allocDir.Destroy()
|
|
testExecCmd = testExecutorCommandWithChroot(t)
|
|
execCmd, allocDir = testExecCmd.command, testExecCmd.allocDir
|
|
execCmd.Cmd = "kill"
|
|
_, err = executor.Launch(execCmd)
|
|
require.Error(err)
|
|
require.Regexp("^file kill not found under path", err)
|
|
|
|
allocDir.Destroy()
|
|
testExecCmd = testExecutorCommandWithChroot(t)
|
|
execCmd, allocDir = testExecCmd.command, testExecCmd.allocDir
|
|
execCmd.Cmd = "echo"
|
|
_, err = executor.Launch(execCmd)
|
|
require.NoError(err)
|
|
}
|
|
|
|
// TestExecutor_DoesNotInheritOomScoreAdj asserts that the exec processes do not
|
|
// inherit the oom_score_adj value of Nomad agent/executor process
|
|
func TestExecutor_DoesNotInheritOomScoreAdj(t *testing.T) {
|
|
ci.Parallel(t)
|
|
testutil.ExecCompatible(t)
|
|
|
|
oomPath := "/proc/self/oom_score_adj"
|
|
origValue, err := os.ReadFile(oomPath)
|
|
require.NoError(t, err, "reading oom_score_adj")
|
|
|
|
err = os.WriteFile(oomPath, []byte("-100"), 0644)
|
|
require.NoError(t, err, "setting temporary oom_score_adj")
|
|
|
|
defer func() {
|
|
err := os.WriteFile(oomPath, origValue, 0644)
|
|
require.NoError(t, err, "restoring oom_score_adj")
|
|
}()
|
|
|
|
testExecCmd := testExecutorCommandWithChroot(t)
|
|
execCmd, allocDir := testExecCmd.command, testExecCmd.allocDir
|
|
defer allocDir.Destroy()
|
|
|
|
execCmd.ResourceLimits = true
|
|
execCmd.Cmd = "/bin/bash"
|
|
execCmd.Args = []string{"-c", "cat /proc/self/oom_score_adj"}
|
|
|
|
executor := NewExecutorWithIsolation(testlog.HCLogger(t))
|
|
defer executor.Shutdown("SIGKILL", 0)
|
|
|
|
_, err = executor.Launch(execCmd)
|
|
require.NoError(t, err)
|
|
|
|
ch := make(chan interface{})
|
|
go func() {
|
|
executor.Wait(context.Background())
|
|
close(ch)
|
|
}()
|
|
|
|
select {
|
|
case <-ch:
|
|
// all good
|
|
case <-time.After(5 * time.Second):
|
|
require.Fail(t, "timeout waiting for exec to shutdown")
|
|
}
|
|
|
|
expected := "0"
|
|
tu.WaitForResult(func() (bool, error) {
|
|
output := strings.TrimSpace(testExecCmd.stdout.String())
|
|
if output != expected {
|
|
return false, fmt.Errorf("oom_score_adj didn't match: want\n%v\n; got:\n%v\n", expected, output)
|
|
}
|
|
return true, nil
|
|
}, func(err error) { require.NoError(t, err) })
|
|
|
|
}
|
|
|
|
func TestExecutor_Capabilities(t *testing.T) {
|
|
ci.Parallel(t)
|
|
testutil.ExecCompatible(t)
|
|
|
|
cases := []struct {
|
|
user string
|
|
caps string
|
|
}{
|
|
{
|
|
user: "nobody",
|
|
caps: `
|
|
CapInh: 0000000000000000
|
|
CapPrm: 0000000000000000
|
|
CapEff: 0000000000000000
|
|
CapBnd: 00000000a80405fb
|
|
CapAmb: 0000000000000000`,
|
|
},
|
|
{
|
|
user: "root",
|
|
caps: `
|
|
CapInh: 0000000000000000
|
|
CapPrm: 0000003fffffffff
|
|
CapEff: 0000003fffffffff
|
|
CapBnd: 0000003fffffffff
|
|
CapAmb: 0000000000000000`,
|
|
},
|
|
}
|
|
|
|
for _, c := range cases {
|
|
t.Run(c.user, func(t *testing.T) {
|
|
|
|
testExecCmd := testExecutorCommandWithChroot(t)
|
|
execCmd, allocDir := testExecCmd.command, testExecCmd.allocDir
|
|
defer allocDir.Destroy()
|
|
|
|
execCmd.User = c.user
|
|
execCmd.ResourceLimits = true
|
|
execCmd.Cmd = "/bin/bash"
|
|
execCmd.Args = []string{"-c", "cat /proc/$$/status"}
|
|
execCmd.Capabilities = capabilities.NomadDefaults().Slice(true)
|
|
|
|
executor := NewExecutorWithIsolation(testlog.HCLogger(t))
|
|
defer executor.Shutdown("SIGKILL", 0)
|
|
|
|
_, err := executor.Launch(execCmd)
|
|
require.NoError(t, err)
|
|
|
|
ch := make(chan interface{})
|
|
go func() {
|
|
executor.Wait(context.Background())
|
|
close(ch)
|
|
}()
|
|
|
|
select {
|
|
case <-ch:
|
|
// all good
|
|
case <-time.After(5 * time.Second):
|
|
require.Fail(t, "timeout waiting for exec to shutdown")
|
|
}
|
|
|
|
canonical := func(s string) string {
|
|
s = strings.TrimSpace(s)
|
|
s = regexp.MustCompile("[ \t]+").ReplaceAllString(s, " ")
|
|
s = regexp.MustCompile("[\n\r]+").ReplaceAllString(s, "\n")
|
|
return s
|
|
}
|
|
|
|
expected := canonical(c.caps)
|
|
tu.WaitForResult(func() (bool, error) {
|
|
output := canonical(testExecCmd.stdout.String())
|
|
if !strings.Contains(output, expected) {
|
|
return false, fmt.Errorf("capabilities didn't match: want\n%v\n; got:\n%v\n", expected, output)
|
|
}
|
|
return true, nil
|
|
}, func(err error) { require.NoError(t, err) })
|
|
})
|
|
}
|
|
|
|
}
|
|
|
|
func TestExecutor_ClientCleanup(t *testing.T) {
|
|
ci.Parallel(t)
|
|
testutil.ExecCompatible(t)
|
|
require := require.New(t)
|
|
|
|
testExecCmd := testExecutorCommandWithChroot(t)
|
|
execCmd, allocDir := testExecCmd.command, testExecCmd.allocDir
|
|
defer allocDir.Destroy()
|
|
|
|
executor := NewExecutorWithIsolation(testlog.HCLogger(t))
|
|
defer executor.Shutdown("", 0)
|
|
|
|
// Need to run a command which will produce continuous output but not
|
|
// too quickly to ensure executor.Exit() stops the process.
|
|
execCmd.Cmd = "/bin/bash"
|
|
execCmd.Args = []string{"-c", "while true; do /bin/echo X; /bin/sleep 1; done"}
|
|
execCmd.ResourceLimits = true
|
|
|
|
ps, err := executor.Launch(execCmd)
|
|
|
|
require.NoError(err)
|
|
require.NotZero(ps.Pid)
|
|
time.Sleep(500 * time.Millisecond)
|
|
require.NoError(executor.Shutdown("SIGINT", 100*time.Millisecond))
|
|
|
|
ch := make(chan interface{})
|
|
go func() {
|
|
executor.Wait(context.Background())
|
|
close(ch)
|
|
}()
|
|
|
|
select {
|
|
case <-ch:
|
|
// all good
|
|
case <-time.After(5 * time.Second):
|
|
require.Fail("timeout waiting for exec to shutdown")
|
|
}
|
|
|
|
output := testExecCmd.stdout.String()
|
|
require.NotZero(len(output))
|
|
time.Sleep(2 * time.Second)
|
|
output1 := testExecCmd.stdout.String()
|
|
require.Equal(len(output), len(output1))
|
|
}
|
|
|
|
func TestExecutor_cmdDevices(t *testing.T) {
|
|
ci.Parallel(t)
|
|
input := []*drivers.DeviceConfig{
|
|
{
|
|
HostPath: "/dev/null",
|
|
TaskPath: "/task/dev/null",
|
|
Permissions: "rwm",
|
|
},
|
|
}
|
|
|
|
expected := &devices.Device{
|
|
Rule: devices.Rule{
|
|
Type: 99,
|
|
Major: 1,
|
|
Minor: 3,
|
|
Permissions: "rwm",
|
|
},
|
|
Path: "/task/dev/null",
|
|
}
|
|
|
|
found, err := cmdDevices(input)
|
|
require.NoError(t, err)
|
|
require.Len(t, found, 1)
|
|
|
|
// ignore file permission and ownership
|
|
// as they are host specific potentially
|
|
d := found[0]
|
|
d.FileMode = 0
|
|
d.Uid = 0
|
|
d.Gid = 0
|
|
|
|
require.EqualValues(t, expected, d)
|
|
}
|
|
|
|
func TestExecutor_cmdMounts(t *testing.T) {
|
|
ci.Parallel(t)
|
|
input := []*drivers.MountConfig{
|
|
{
|
|
HostPath: "/host/path-ro",
|
|
TaskPath: "/task/path-ro",
|
|
Readonly: true,
|
|
},
|
|
{
|
|
HostPath: "/host/path-rw",
|
|
TaskPath: "/task/path-rw",
|
|
Readonly: false,
|
|
},
|
|
}
|
|
|
|
expected := []*lconfigs.Mount{
|
|
{
|
|
Source: "/host/path-ro",
|
|
Destination: "/task/path-ro",
|
|
Flags: unix.MS_BIND | unix.MS_RDONLY,
|
|
Device: "bind",
|
|
PropagationFlags: []int{unix.MS_PRIVATE | unix.MS_REC},
|
|
},
|
|
{
|
|
Source: "/host/path-rw",
|
|
Destination: "/task/path-rw",
|
|
Flags: unix.MS_BIND,
|
|
Device: "bind",
|
|
PropagationFlags: []int{unix.MS_PRIVATE | unix.MS_REC},
|
|
},
|
|
}
|
|
|
|
require.EqualValues(t, expected, cmdMounts(input))
|
|
}
|
|
|
|
// TestUniversalExecutor_NoCgroup asserts that commands are executed in the
|
|
// same cgroup as parent process
|
|
func TestUniversalExecutor_NoCgroup(t *testing.T) {
|
|
ci.Parallel(t)
|
|
testutil.ExecCompatible(t)
|
|
|
|
expectedBytes, err := ioutil.ReadFile("/proc/self/cgroup")
|
|
require.NoError(t, err)
|
|
|
|
expected := strings.TrimSpace(string(expectedBytes))
|
|
|
|
testExecCmd := testExecutorCommand(t)
|
|
execCmd, allocDir := testExecCmd.command, testExecCmd.allocDir
|
|
execCmd.Cmd = "/bin/cat"
|
|
execCmd.Args = []string{"/proc/self/cgroup"}
|
|
defer allocDir.Destroy()
|
|
|
|
execCmd.BasicProcessCgroup = false
|
|
execCmd.ResourceLimits = false
|
|
|
|
executor := NewExecutor(testlog.HCLogger(t))
|
|
defer executor.Shutdown("SIGKILL", 0)
|
|
|
|
_, err = executor.Launch(execCmd)
|
|
require.NoError(t, err)
|
|
|
|
_, err = executor.Wait(context.Background())
|
|
require.NoError(t, err)
|
|
|
|
tu.WaitForResult(func() (bool, error) {
|
|
act := strings.TrimSpace(string(testExecCmd.stdout.String()))
|
|
if expected != act {
|
|
return false, fmt.Errorf("expected:\n%s actual:\n%s", expected, act)
|
|
}
|
|
return true, nil
|
|
}, func(err error) {
|
|
stderr := strings.TrimSpace(string(testExecCmd.stderr.String()))
|
|
t.Logf("stderr: %v", stderr)
|
|
require.NoError(t, err)
|
|
})
|
|
|
|
}
|