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package integration
import (
"fmt"
"io/ioutil"
"os"
"os/user"
"strings"
. "github.com/containers/podman/v4/test/utils"
"github.com/containers/storage"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
. "github.com/onsi/gomega/gexec"
)
var _ = Describe("Podman UserNS support", func() {
var (
tempdir string
err error
podmanTest *PodmanTestIntegration
)
BeforeEach(func() {
if os.Getenv("SKIP_USERNS") != "" {
Skip("Skip userns tests.")
}
if _, err := os.Stat("/proc/self/uid_map"); err != nil {
Skip("User namespaces not supported.")
}
tempdir, err = CreateTempDirInTempDir()
if err != nil {
os.Exit(1)
}
podmanTest = PodmanTestCreate(tempdir)
podmanTest.Setup()
})
AfterEach(func() {
podmanTest.Cleanup()
f := CurrentGinkgoTestDescription()
processTestResult(f)
})
// Note: Lot of tests for build with --userns=auto are already there in buildah
// but they are skipped in podman CI because bud tests are executed in rootfull
// environment ( where mappings for the `containers` user is not present in /etc/subuid )
// causing them to skip hence this is a redundant test for sanity to make sure
// we don't break this feature for podman-remote.
It("podman build with --userns=auto", func() {
u, err := user.Current()
Expect(err).To(BeNil())
name := u.Name
if name == "root" {
name = "containers"
}
content, err := ioutil.ReadFile("/etc/subuid")
if err != nil {
Skip("cannot read /etc/subuid")
}
if !strings.Contains(string(content), name) {
Skip("cannot find mappings for the current user")
}
session := podmanTest.Podman([]string{"build", "-f", "build/Containerfile.userns-auto", "-t", "test", "--userns=auto"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
// `1024` is the default size or length of the range of user IDs
// that is mapped between the two user namespaces by --userns=auto.
Expect(session.OutputToString()).To(ContainSubstring(fmt.Sprintf("%d", storage.AutoUserNsMinSize)))
})
It("podman uidmapping and gidmapping", func() {
session := podmanTest.Podman([]string{"run", "--uidmap=0:100:5000", "--gidmap=0:200:5000", "alpine", "echo", "hello"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("hello"))
})
// It essentially repeats the test above but with the `-it` short option
// that broke execution at:
// https://github.com/containers/podman/pull/1066#issuecomment-403562116
// To avoid a potential future regression, use this as a test.
It("podman uidmapping and gidmapping with short-opts", func() {
session := podmanTest.Podman([]string{"run", "--uidmap=0:1:5000", "--gidmap=0:200:5000", "-it", "alpine", "echo", "hello"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("hello"))
})
It("podman uidmapping and gidmapping with a volume", func() {
session := podmanTest.Podman([]string{"run", "--uidmap=0:1:500", "--gidmap=0:200:5000", "-v", "my-foo-volume:/foo:Z", "alpine", "echo", "hello"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("hello"))
})
It("podman uidmapping and gidmapping --net=host", func() {
session := podmanTest.Podman([]string{"run", "--net=host", "--uidmap=0:1:5000", "--gidmap=0:200:5000", "alpine", "echo", "hello"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("hello"))
})
It("podman --userns=keep-id", func() {
session := podmanTest.Podman([]string{"run", "--userns=keep-id", "alpine", "id", "-u"})
session.WaitWithDefaultTimeout()
if os.Geteuid() == 0 {
Expect(session).Should(Exit(125))
return
}
Expect(session).Should(Exit(0))
uid := fmt.Sprintf("%d", os.Geteuid())
Expect(session.OutputToString()).To(ContainSubstring(uid))
session = podmanTest.Podman([]string{"run", "--userns=keep-id:uid=10,gid=12", "alpine", "sh", "-c", "echo $(id -u):$(id -g)"})
session.WaitWithDefaultTimeout()
if os.Geteuid() == 0 {
Expect(session).Should(Exit(125))
return
}
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("10:12"))
})
It("podman --userns=keep-id check passwd", func() {
SkipIfNotRootless("keep-id only works in rootless mode")
session := podmanTest.Podman([]string{"run", "--userns=keep-id", "alpine", "id", "-un"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
u, err := user.Current()
Expect(err).To(BeNil())
Expect(session.OutputToString()).To(ContainSubstring(u.Name))
})
It("podman --userns=keep-id root owns /usr", func() {
SkipIfNotRootless("keep-id only works in rootless mode")
session := podmanTest.Podman([]string{"run", "--userns=keep-id", "alpine", "stat", "-c%u", "/usr"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(Equal("0"))
})
It("podman --userns=keep-id --user root:root", func() {
SkipIfNotRootless("keep-id only works in rootless mode")
session := podmanTest.Podman([]string{"run", "--userns=keep-id", "--user", "root:root", "alpine", "id", "-u"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(Equal("0"))
})
It("podman run --userns=keep-id can add users", func() {
SkipIfNotRootless("keep-id only works in rootless mode")
userName := os.Getenv("USER")
if userName == "" {
Skip("Can't complete test if no username available")
}
ctrName := "ctr-name"
session := podmanTest.Podman([]string{"run", "--userns=keep-id", "--user", "root:root", "-d", "--stop-signal", "9", "--name", ctrName, fedoraMinimal, "sleep", "600"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
exec1 := podmanTest.Podman([]string{"exec", "-t", "-i", ctrName, "cat", "/etc/passwd"})
exec1.WaitWithDefaultTimeout()
Expect(exec1).Should(Exit(0))
Expect(exec1.OutputToString()).To(ContainSubstring(userName))
exec2 := podmanTest.Podman([]string{"exec", "-t", "-i", ctrName, "useradd", "testuser"})
exec2.WaitWithDefaultTimeout()
Expect(exec2).Should(Exit(0))
})
It("podman --userns=auto", func() {
u, err := user.Current()
Expect(err).To(BeNil())
name := u.Name
if name == "root" {
name = "containers"
}
content, err := ioutil.ReadFile("/etc/subuid")
if err != nil {
Skip("cannot read /etc/subuid")
}
if !strings.Contains(string(content), name) {
Skip("cannot find mappings for the current user")
}
m := make(map[string]string)
for i := 0; i < 5; i++ {
session := podmanTest.Podman([]string{"run", "--userns=auto", "alpine", "cat", "/proc/self/uid_map"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
l := session.OutputToString()
// `1024` is the default size or length of the range of user IDs
// that is mapped between the two user namespaces by --userns=auto.
Expect(l).To(ContainSubstring("1024"))
m[l] = l
}
// check for no duplicates
Expect(m).To(HaveLen(5))
})
It("podman --userns=auto:size=%d", func() {
u, err := user.Current()
Expect(err).To(BeNil())
name := u.Name
if name == "root" {
name = "containers"
}
content, err := ioutil.ReadFile("/etc/subuid")
if err != nil {
Skip("cannot read /etc/subuid")
}
if !strings.Contains(string(content), name) {
Skip("cannot find mappings for the current user")
}
session := podmanTest.Podman([]string{"run", "--userns=auto:size=500", "alpine", "cat", "/proc/self/uid_map"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("500"))
session = podmanTest.Podman([]string{"run", "--userns=auto:size=3000", "alpine", "cat", "/proc/self/uid_map"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("3000"))
session = podmanTest.Podman([]string{"run", "--userns=auto", "--user=2000:3000", "alpine", "cat", "/proc/self/uid_map"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("3001"))
session = podmanTest.Podman([]string{"run", "--userns=auto", "--user=4000:1000", "alpine", "cat", "/proc/self/uid_map"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("4001"))
})
It("podman --userns=auto:uidmapping=", func() {
u, err := user.Current()
Expect(err).To(BeNil())
name := u.Name
if name == "root" {
name = "containers"
}
content, err := ioutil.ReadFile("/etc/subuid")
if err != nil {
Skip("cannot read /etc/subuid")
}
if !strings.Contains(string(content), name) {
Skip("cannot find mappings for the current user")
}
session := podmanTest.Podman([]string{"run", "--userns=auto:uidmapping=0:0:1", "alpine", "cat", "/proc/self/uid_map"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
output := session.OutputToString()
Expect(output).To(MatchRegexp("\\s0\\s0\\s1"))
session = podmanTest.Podman([]string{"run", "--userns=auto:size=8192,uidmapping=0:0:1", "alpine", "cat", "/proc/self/uid_map"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("8191"))
})
It("podman --userns=auto:gidmapping=", func() {
u, err := user.Current()
Expect(err).To(BeNil())
name := u.Name
if name == "root" {
name = "containers"
}
content, err := ioutil.ReadFile("/etc/subuid")
if err != nil {
Skip("cannot read /etc/subuid")
}
if !strings.Contains(string(content), name) {
Skip("cannot find mappings for the current user")
}
session := podmanTest.Podman([]string{"run", "--userns=auto:gidmapping=0:0:1", "alpine", "cat", "/proc/self/gid_map"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
output := session.OutputToString()
Expect(output).To(MatchRegexp("\\s0\\s0\\s1"))
session = podmanTest.Podman([]string{"run", "--userns=auto:size=8192,gidmapping=0:0:1", "alpine", "cat", "/proc/self/gid_map"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("8191"))
})
It("podman --userns=container:CTR", func() {
ctrName := "userns-ctr"
session := podmanTest.Podman([]string{"run", "-d", "--uidmap=0:0:1", "--uidmap=1:1:4998", "--name", ctrName, "alpine", "top"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
// runc has an issue and we also need to join the IPC namespace.
session = podmanTest.Podman([]string{"run", "--rm", "--userns=container:" + ctrName, "--ipc=container:" + ctrName, "alpine", "cat", "/proc/self/uid_map"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("4998"))
session = podmanTest.Podman([]string{"run", "--rm", "--userns=container:" + ctrName, "--net=container:" + ctrName, "alpine", "cat", "/proc/self/uid_map"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(session.OutputToString()).To(ContainSubstring("4998"))
})
It("podman --user with volume", func() {
tests := []struct {
uid, gid, arg, vol string
}{
{"0", "0", "0:0", "vol-0"},
{"1000", "0", "1000", "vol-1"},
{"1000", "1000", "1000:1000", "vol-2"},
}
for _, tt := range tests {
session := podmanTest.Podman([]string{"run", "-d", "--user", tt.arg, "--mount", "type=volume,src=" + tt.vol + ",dst=/home/user", "alpine", "top"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
inspectUID := podmanTest.Podman([]string{"volume", "inspect", "--format", "{{ .UID }}", tt.vol})
inspectUID.WaitWithDefaultTimeout()
Expect(inspectUID).Should(Exit(0))
Expect(inspectUID.OutputToString()).To(Equal(tt.uid))
// Make sure we're defaulting to 0.
inspectGID := podmanTest.Podman([]string{"volume", "inspect", "--format", "{{ .GID }}", tt.vol})
inspectGID.WaitWithDefaultTimeout()
Expect(inspectGID).Should(Exit(0))
Expect(inspectGID.OutputToString()).To(Equal(tt.gid))
}
})
It("podman --userns= conflicts with ui[dg]map and sub[ug]idname", func() {
session := podmanTest.Podman([]string{"run", "--userns=host", "--uidmap=0:1:500", "alpine", "true"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(125))
Expect(session.ErrorToString()).To(ContainSubstring("--userns and --uidmap/--gidmap/--subuidname/--subgidname are mutually exclusive"))
session = podmanTest.Podman([]string{"run", "--userns=host", "--gidmap=0:200:5000", "alpine", "true"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(125))
Expect(session.ErrorToString()).To(ContainSubstring("--userns and --uidmap/--gidmap/--subuidname/--subgidname are mutually exclusive"))
// with sub[ug]idname we don't check for the error output since the error message could be different, depending on the
// system configuration since the specified user could not be defined and cause a different earlier error.
// In any case, make sure the command doesn't succeed.
session = podmanTest.Podman([]string{"run", "--userns=private", "--subuidname=containers", "alpine", "true"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Not(Exit(0)))
session = podmanTest.Podman([]string{"run", "--userns=private", "--subgidname=containers", "alpine", "true"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Not(Exit(0)))
})
It("podman PODMAN_USERNS", func() {
SkipIfNotRootless("keep-id only works in rootless mode")
podmanUserns, podmanUserusSet := os.LookupEnv("PODMAN_USERNS")
os.Setenv("PODMAN_USERNS", "keep-id")
defer func() {
if podmanUserusSet {
os.Setenv("PODMAN_USERNS", podmanUserns)
} else {
os.Unsetenv("PODMAN_USERNS")
}
}()
if IsRemote() {
podmanTest.RestartRemoteService()
}
result := podmanTest.Podman([]string{"create", ALPINE, "true"})
result.WaitWithDefaultTimeout()
Expect(result).Should(Exit(0))
inspect := podmanTest.Podman([]string{"inspect", "--format", "{{ .HostConfig.IDMappings }}", result.OutputToString()})
inspect.WaitWithDefaultTimeout()
Expect(inspect.OutputToString()).To(Not(Equal("<nil>")))
if IsRemote() {
podmanTest.RestartRemoteService()
}
})
})
|
