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docker_cli_update_unix_test.go
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// +build !windows
package main
import (
"context"
"encoding/json"
"fmt"
"os/exec"
"strings"
"time"
"github.com/docker/docker/api/types"
"github.com/docker/docker/client"
"github.com/docker/docker/internal/test/request"
"github.com/docker/docker/pkg/parsers/kernel"
"github.com/go-check/check"
"github.com/kr/pty"
"gotest.tools/assert"
)
func (s *DockerSuite) TestUpdateRunningContainer(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, memoryLimitSupport)
name := "test-update-container"
dockerCmd(c, "run", "-d", "--name", name, "-m", "300M", "busybox", "top")
dockerCmd(c, "update", "-m", "500M", name)
assert.Equal(c, inspectField(c, name, "HostConfig.Memory"), "524288000")
file := "/sys/fs/cgroup/memory/memory.limit_in_bytes"
out, _ := dockerCmd(c, "exec", name, "cat", file)
assert.Equal(c, strings.TrimSpace(out), "524288000")
}
func (s *DockerSuite) TestUpdateRunningContainerWithRestart(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, memoryLimitSupport)
name := "test-update-container"
dockerCmd(c, "run", "-d", "--name", name, "-m", "300M", "busybox", "top")
dockerCmd(c, "update", "-m", "500M", name)
dockerCmd(c, "restart", name)
assert.Equal(c, inspectField(c, name, "HostConfig.Memory"), "524288000")
file := "/sys/fs/cgroup/memory/memory.limit_in_bytes"
out, _ := dockerCmd(c, "exec", name, "cat", file)
assert.Equal(c, strings.TrimSpace(out), "524288000")
}
func (s *DockerSuite) TestUpdateStoppedContainer(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, memoryLimitSupport)
name := "test-update-container"
file := "/sys/fs/cgroup/memory/memory.limit_in_bytes"
dockerCmd(c, "run", "--name", name, "-m", "300M", "busybox", "cat", file)
dockerCmd(c, "update", "-m", "500M", name)
assert.Equal(c, inspectField(c, name, "HostConfig.Memory"), "524288000")
out, _ := dockerCmd(c, "start", "-a", name)
assert.Equal(c, strings.TrimSpace(out), "524288000")
}
func (s *DockerSuite) TestUpdatePausedContainer(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, cpuShare)
name := "test-update-container"
dockerCmd(c, "run", "-d", "--name", name, "--cpu-shares", "1000", "busybox", "top")
dockerCmd(c, "pause", name)
dockerCmd(c, "update", "--cpu-shares", "500", name)
assert.Equal(c, inspectField(c, name, "HostConfig.CPUShares"), "500")
dockerCmd(c, "unpause", name)
file := "/sys/fs/cgroup/cpu/cpu.shares"
out, _ := dockerCmd(c, "exec", name, "cat", file)
assert.Equal(c, strings.TrimSpace(out), "500")
}
func (s *DockerSuite) TestUpdateWithUntouchedFields(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, memoryLimitSupport)
testRequires(c, cpuShare)
name := "test-update-container"
dockerCmd(c, "run", "-d", "--name", name, "-m", "300M", "--cpu-shares", "800", "busybox", "top")
dockerCmd(c, "update", "-m", "500M", name)
// Update memory and not touch cpus, `cpuset.cpus` should still have the old value
out := inspectField(c, name, "HostConfig.CPUShares")
assert.Equal(c, out, "800")
file := "/sys/fs/cgroup/cpu/cpu.shares"
out, _ = dockerCmd(c, "exec", name, "cat", file)
assert.Equal(c, strings.TrimSpace(out), "800")
}
func (s *DockerSuite) TestUpdateContainerInvalidValue(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, memoryLimitSupport)
name := "test-update-container"
dockerCmd(c, "run", "-d", "--name", name, "-m", "300M", "busybox", "true")
out, _, err := dockerCmdWithError("update", "-m", "2M", name)
assert.ErrorContains(c, err, "")
expected := "Minimum memory limit allowed is 4MB"
assert.Assert(c, strings.Contains(out, expected))
}
func (s *DockerSuite) TestUpdateContainerWithoutFlags(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, memoryLimitSupport)
name := "test-update-container"
dockerCmd(c, "run", "-d", "--name", name, "-m", "300M", "busybox", "true")
_, _, err := dockerCmdWithError("update", name)
assert.ErrorContains(c, err, "")
}
func (s *DockerSuite) TestUpdateKernelMemory(c *check.C) {
testRequires(c, DaemonIsLinux, kernelMemorySupport)
name := "test-update-container"
dockerCmd(c, "run", "-d", "--name", name, "--kernel-memory", "50M", "busybox", "top")
dockerCmd(c, "update", "--kernel-memory", "100M", name)
assert.Equal(c, inspectField(c, name, "HostConfig.KernelMemory"), "104857600")
file := "/sys/fs/cgroup/memory/memory.kmem.limit_in_bytes"
out, _ := dockerCmd(c, "exec", name, "cat", file)
assert.Equal(c, strings.TrimSpace(out), "104857600")
}
func (s *DockerSuite) TestUpdateKernelMemoryUninitialized(c *check.C) {
testRequires(c, DaemonIsLinux, kernelMemorySupport)
isNewKernel := CheckKernelVersion(4, 6, 0)
name := "test-update-container"
dockerCmd(c, "run", "-d", "--name", name, "busybox", "top")
_, _, err := dockerCmdWithError("update", "--kernel-memory", "100M", name)
// Update kernel memory to a running container without kernel memory initialized
// is not allowed before kernel version 4.6.
if !isNewKernel {
assert.ErrorContains(c, err, "")
} else {
assert.NilError(c, err)
}
dockerCmd(c, "pause", name)
_, _, err = dockerCmdWithError("update", "--kernel-memory", "200M", name)
if !isNewKernel {
assert.ErrorContains(c, err, "")
} else {
assert.NilError(c, err)
}
dockerCmd(c, "unpause", name)
dockerCmd(c, "stop", name)
dockerCmd(c, "update", "--kernel-memory", "300M", name)
dockerCmd(c, "start", name)
assert.Equal(c, inspectField(c, name, "HostConfig.KernelMemory"), "314572800")
file := "/sys/fs/cgroup/memory/memory.kmem.limit_in_bytes"
out, _ := dockerCmd(c, "exec", name, "cat", file)
assert.Equal(c, strings.TrimSpace(out), "314572800")
}
// GetKernelVersion gets the current kernel version.
func GetKernelVersion() *kernel.VersionInfo {
v, _ := kernel.ParseRelease(testEnv.DaemonInfo.KernelVersion)
return v
}
// CheckKernelVersion checks if current kernel is newer than (or equal to)
// the given version.
func CheckKernelVersion(k, major, minor int) bool {
return kernel.CompareKernelVersion(*GetKernelVersion(), kernel.VersionInfo{Kernel: k, Major: major, Minor: minor}) >= 0
}
func (s *DockerSuite) TestUpdateSwapMemoryOnly(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, memoryLimitSupport)
testRequires(c, swapMemorySupport)
name := "test-update-container"
dockerCmd(c, "run", "-d", "--name", name, "--memory", "300M", "--memory-swap", "500M", "busybox", "top")
dockerCmd(c, "update", "--memory-swap", "600M", name)
assert.Equal(c, inspectField(c, name, "HostConfig.MemorySwap"), "629145600")
file := "/sys/fs/cgroup/memory/memory.memsw.limit_in_bytes"
out, _ := dockerCmd(c, "exec", name, "cat", file)
assert.Equal(c, strings.TrimSpace(out), "629145600")
}
func (s *DockerSuite) TestUpdateInvalidSwapMemory(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, memoryLimitSupport)
testRequires(c, swapMemorySupport)
name := "test-update-container"
dockerCmd(c, "run", "-d", "--name", name, "--memory", "300M", "--memory-swap", "500M", "busybox", "top")
_, _, err := dockerCmdWithError("update", "--memory-swap", "200M", name)
// Update invalid swap memory should fail.
// This will pass docker config validation, but failed at kernel validation
assert.ErrorContains(c, err, "")
// Update invalid swap memory with failure should not change HostConfig
assert.Equal(c, inspectField(c, name, "HostConfig.Memory"), "314572800")
assert.Equal(c, inspectField(c, name, "HostConfig.MemorySwap"), "524288000")
dockerCmd(c, "update", "--memory-swap", "600M", name)
assert.Equal(c, inspectField(c, name, "HostConfig.MemorySwap"), "629145600")
file := "/sys/fs/cgroup/memory/memory.memsw.limit_in_bytes"
out, _ := dockerCmd(c, "exec", name, "cat", file)
assert.Equal(c, strings.TrimSpace(out), "629145600")
}
func (s *DockerSuite) TestUpdateStats(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, memoryLimitSupport)
testRequires(c, cpuCfsQuota)
name := "foo"
dockerCmd(c, "run", "-d", "-ti", "--name", name, "-m", "500m", "busybox")
assert.NilError(c, waitRun(name))
getMemLimit := func(id string) uint64 {
resp, body, err := request.Get(fmt.Sprintf("/containers/%s/stats?stream=false", id))
assert.NilError(c, err)
assert.Equal(c, resp.Header.Get("Content-Type"), "application/json")
var v *types.Stats
err = json.NewDecoder(body).Decode(&v)
assert.NilError(c, err)
body.Close()
return v.MemoryStats.Limit
}
preMemLimit := getMemLimit(name)
dockerCmd(c, "update", "--cpu-quota", "2000", name)
curMemLimit := getMemLimit(name)
assert.Equal(c, preMemLimit, curMemLimit)
}
func (s *DockerSuite) TestUpdateMemoryWithSwapMemory(c *check.C) {
testRequires(c, DaemonIsLinux)
testRequires(c, memoryLimitSupport)
testRequires(c, swapMemorySupport)
name := "test-update-container"
dockerCmd(c, "run", "-d", "--name", name, "--memory", "300M", "busybox", "top")
out, _, err := dockerCmdWithError("update", "--memory", "800M", name)
assert.ErrorContains(c, err, "")
assert.Assert(c, strings.Contains(out, "Memory limit should be smaller than already set memoryswap limit"))
dockerCmd(c, "update", "--memory", "800M", "--memory-swap", "1000M", name)
}
func (s *DockerSuite) TestUpdateNotAffectMonitorRestartPolicy(c *check.C) {
testRequires(c, DaemonIsLinux, cpuShare)
out, _ := dockerCmd(c, "run", "-tid", "--restart=always", "busybox", "sh")
id := strings.TrimSpace(string(out))
dockerCmd(c, "update", "--cpu-shares", "512", id)
cpty, tty, err := pty.Open()
assert.NilError(c, err)
defer cpty.Close()
cmd := exec.Command(dockerBinary, "attach", id)
cmd.Stdin = tty
assert.NilError(c, cmd.Start())
defer cmd.Process.Kill()
_, err = cpty.Write([]byte("exit\n"))
assert.NilError(c, err)
assert.NilError(c, cmd.Wait())
// container should restart again and keep running
err = waitInspect(id, "{{.RestartCount}}", "1", 30*time.Second)
assert.NilError(c, err)
assert.NilError(c, waitRun(id))
}
func (s *DockerSuite) TestUpdateWithNanoCPUs(c *check.C) {
testRequires(c, cpuCfsQuota, cpuCfsPeriod)
file1 := "/sys/fs/cgroup/cpu/cpu.cfs_quota_us"
file2 := "/sys/fs/cgroup/cpu/cpu.cfs_period_us"
out, _ := dockerCmd(c, "run", "-d", "--cpus", "0.5", "--name", "top", "busybox", "top")
assert.Assert(c, strings.TrimSpace(out) != "")
out, _ = dockerCmd(c, "exec", "top", "sh", "-c", fmt.Sprintf("cat %s && cat %s", file1, file2))
assert.Equal(c, strings.TrimSpace(out), "50000\n100000")
clt, err := client.NewClientWithOpts(client.FromEnv)
assert.NilError(c, err)
inspect, err := clt.ContainerInspect(context.Background(), "top")
assert.NilError(c, err)
assert.Equal(c, inspect.HostConfig.NanoCPUs, int64(500000000))
out = inspectField(c, "top", "HostConfig.CpuQuota")
assert.Equal(c, out, "0", "CPU CFS quota should be 0")
out = inspectField(c, "top", "HostConfig.CpuPeriod")
assert.Equal(c, out, "0", "CPU CFS period should be 0")
out, _, err = dockerCmdWithError("update", "--cpu-quota", "80000", "top")
assert.ErrorContains(c, err, "")
assert.Assert(c, strings.Contains(out, "Conflicting options: CPU Quota cannot be updated as NanoCPUs has already been set"))
dockerCmd(c, "update", "--cpus", "0.8", "top")
inspect, err = clt.ContainerInspect(context.Background(), "top")
assert.NilError(c, err)
assert.Equal(c, inspect.HostConfig.NanoCPUs, int64(800000000))
out = inspectField(c, "top", "HostConfig.CpuQuota")
assert.Equal(c, out, "0", "CPU CFS quota should be 0")
out = inspectField(c, "top", "HostConfig.CpuPeriod")
assert.Equal(c, out, "0", "CPU CFS period should be 0")
out, _ = dockerCmd(c, "exec", "top", "sh", "-c", fmt.Sprintf("cat %s && cat %s", file1, file2))
assert.Equal(c, strings.TrimSpace(out), "80000\n100000")
}