74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
package allocdir
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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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"testing"
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"github.com/hashicorp/nomad/helper/testlog"
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"golang.org/x/sys/unix"
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)
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// TestLinuxSpecialDirs ensures mounting /dev and /proc works.
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func TestLinuxSpecialDirs(t *testing.T) {
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if unix.Geteuid() != 0 {
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t.Skip("Must be run as root")
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}
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allocDir, err := ioutil.TempDir("", "nomadtest-specialdirs")
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if err != nil {
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t.Fatalf("unable to create tempdir for test: %v", err)
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}
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defer os.RemoveAll(allocDir)
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td := newTaskDir(testlog.Logger(t), allocDir, "test")
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// Despite the task dir not existing, unmountSpecialDirs should *not*
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// return an error
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if err := td.unmountSpecialDirs(); err != nil {
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t.Fatalf("error removing nonexistent special dirs: %v", err)
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}
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// Mounting special dirs in a nonexistent task dir *should* return an
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// error
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if err := td.mountSpecialDirs(); err == nil {
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t.Fatalf("expected mounting in a nonexistent task dir %q to fail", td.Dir)
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}
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// Create the task dir like TaskDir.Build would
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if err := os.MkdirAll(td.Dir, 0777); err != nil {
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t.Fatalf("error creating task dir %q: %v", td.Dir, err)
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}
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// Mounting special dirs should now work and contain files
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if err := td.mountSpecialDirs(); err != nil {
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t.Fatalf("error mounting special dirs in %q: %v", td.Dir, err)
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}
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if empty, err := pathEmpty(filepath.Join(td.Dir, "dev")); empty || err != nil {
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t.Fatalf("expected dev to be populated but found: empty=%v error=%v", empty, err)
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}
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if empty, err := pathEmpty(filepath.Join(td.Dir, "proc")); empty || err != nil {
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t.Fatalf("expected proc to be populated but found: empty=%v error=%v", empty, err)
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}
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// Remounting again should be fine
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if err := td.mountSpecialDirs(); err != nil {
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t.Fatalf("error remounting special dirs in %q: %v", td.Dir, err)
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}
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// Now unmount
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if err := td.unmountSpecialDirs(); err != nil {
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t.Fatalf("error unmounting special dirs in %q: %v", td.Dir, err)
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}
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if pathExists(filepath.Join(td.Dir, "dev")) {
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t.Fatalf("dev was not removed from %q", td.Dir)
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}
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if pathExists(filepath.Join(td.Dir, "proc")) {
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t.Fatalf("proc was not removed from %q", td.Dir)
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}
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if err := td.unmountSpecialDirs(); err != nil {
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t.Fatalf("error re-unmounting special dirs in %q: %v", td.Dir, err)
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}
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}
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