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-rw-r--r--cmd/podman/common/create.go48
-rw-r--r--docs/source/markdown/podman-container-clone.1.md27
-rw-r--r--pkg/specgen/generate/container_create.go34
-rw-r--r--test/e2e/container_clone_test.go14
4 files changed, 75 insertions, 48 deletions
diff --git a/cmd/podman/common/create.go b/cmd/podman/common/create.go
index 309bbda59..62c9f4c9a 100644
--- a/cmd/podman/common/create.go
+++ b/cmd/podman/common/create.go
@@ -312,30 +312,6 @@ func DefineCreateFlags(cmd *cobra.Command, cf *entities.ContainerCreateOptions,
)
_ = cmd.RegisterFlagCompletionFunc(logOptFlagName, AutocompleteLogOpt)
- memoryReservationFlagName := "memory-reservation"
- createFlags.StringVar(
- &cf.MemoryReservation,
- memoryReservationFlagName, "",
- "Memory soft limit "+sizeWithUnitFormat,
- )
- _ = cmd.RegisterFlagCompletionFunc(memoryReservationFlagName, completion.AutocompleteNone)
-
- memorySwapFlagName := "memory-swap"
- createFlags.StringVar(
- &cf.MemorySwap,
- memorySwapFlagName, "",
- "Swap limit equal to memory plus swap: '-1' to enable unlimited swap",
- )
- _ = cmd.RegisterFlagCompletionFunc(memorySwapFlagName, completion.AutocompleteNone)
-
- memorySwappinessFlagName := "memory-swappiness"
- createFlags.Int64Var(
- &cf.MemorySwappiness,
- memorySwappinessFlagName, -1,
- "Tune container memory swappiness (0 to 100, or -1 for system default)",
- )
- _ = cmd.RegisterFlagCompletionFunc(memorySwappinessFlagName, completion.AutocompleteNone)
-
createFlags.BoolVar(
&cf.NoHealthCheck,
"no-healthcheck", false,
@@ -895,6 +871,30 @@ func DefineCreateFlags(cmd *cobra.Command, cf *entities.ContainerCreateOptions,
"Memory limit "+sizeWithUnitFormat,
)
_ = cmd.RegisterFlagCompletionFunc(memoryFlagName, completion.AutocompleteNone)
+
+ memoryReservationFlagName := "memory-reservation"
+ createFlags.StringVar(
+ &cf.MemoryReservation,
+ memoryReservationFlagName, "",
+ "Memory soft limit "+sizeWithUnitFormat,
+ )
+ _ = cmd.RegisterFlagCompletionFunc(memoryReservationFlagName, completion.AutocompleteNone)
+
+ memorySwapFlagName := "memory-swap"
+ createFlags.StringVar(
+ &cf.MemorySwap,
+ memorySwapFlagName, "",
+ "Swap limit equal to memory plus swap: '-1' to enable unlimited swap",
+ )
+ _ = cmd.RegisterFlagCompletionFunc(memorySwapFlagName, completion.AutocompleteNone)
+
+ memorySwappinessFlagName := "memory-swappiness"
+ createFlags.Int64Var(
+ &cf.MemorySwappiness,
+ memorySwappinessFlagName, -1,
+ "Tune container memory swappiness (0 to 100, or -1 for system default)",
+ )
+ _ = cmd.RegisterFlagCompletionFunc(memorySwappinessFlagName, completion.AutocompleteNone)
}
//anyone can use these
cpusFlagName := "cpus"
diff --git a/docs/source/markdown/podman-container-clone.1.md b/docs/source/markdown/podman-container-clone.1.md
index 6c23abe81..7d5e1c262 100644
--- a/docs/source/markdown/podman-container-clone.1.md
+++ b/docs/source/markdown/podman-container-clone.1.md
@@ -137,6 +137,33 @@ system's page size (the value would be very large, that's millions of trillions)
If no memory limits are specified, the original container's will be used.
+#### **--memory-reservation**=*limit*
+
+Memory soft limit (format: `<number>[<unit>]`, where unit = b (bytes), k (kilobytes), m (megabytes), or g (gigabytes))
+
+After setting memory reservation, when the system detects memory contention
+or low memory, containers are forced to restrict their consumption to their
+reservation. So you should always set the value below **--memory**, otherwise the
+hard limit will take precedence. By default, memory reservation will be the same
+as memory limit from the container being cloned.
+
+#### **--memory-swap**=*limit*
+
+A limit value equal to memory plus swap. Must be used with the **-m**
+(**--memory**) flag. The swap `LIMIT` should always be larger than **-m**
+(**--memory**) value. By default, the swap `LIMIT` will be set to double
+the value of --memory if specified. Otherwise, the container being cloned will be used to derive the swap value.
+
+The format of `LIMIT` is `<number>[<unit>]`. Unit can be `b` (bytes),
+`k` (kilobytes), `m` (megabytes), or `g` (gigabytes). If you don't specify a
+unit, `b` is used. Set LIMIT to `-1` to enable unlimited swap.
+
+#### **--memory-swappiness**=*number*
+
+Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
+
+This flag is not supported on cgroups V2 systems.
+
#### **--name**
Set a custom name for the cloned container. The default if not specified is of the syntax: **<ORIGINAL_NAME>-clone**
diff --git a/pkg/specgen/generate/container_create.go b/pkg/specgen/generate/container_create.go
index b85a87742..5667a02e8 100644
--- a/pkg/specgen/generate/container_create.go
+++ b/pkg/specgen/generate/container_create.go
@@ -8,7 +8,6 @@ import (
cdi "github.com/container-orchestrated-devices/container-device-interface/pkg/cdi"
"github.com/containers/common/libimage"
- "github.com/containers/common/pkg/cgroups"
"github.com/containers/podman/v4/libpod"
"github.com/containers/podman/v4/libpod/define"
"github.com/containers/podman/v4/pkg/namespaces"
@@ -184,32 +183,19 @@ func MakeContainer(ctx context.Context, rt *libpod.Runtime, s *specgen.SpecGener
if err != nil {
return nil, nil, nil, err
}
-
- switch {
- case s.ResourceLimits.CPU != nil:
- runtimeSpec.Linux.Resources.CPU = s.ResourceLimits.CPU
- case s.ResourceLimits.Memory != nil:
- runtimeSpec.Linux.Resources.Memory = s.ResourceLimits.Memory
- case s.ResourceLimits.BlockIO != nil:
- runtimeSpec.Linux.Resources.BlockIO = s.ResourceLimits.BlockIO
- case s.ResourceLimits.Devices != nil:
- runtimeSpec.Linux.Resources.Devices = s.ResourceLimits.Devices
- }
-
- cgroup2, err := cgroups.IsCgroup2UnifiedMode()
- if err != nil {
- return nil, nil, nil, err
- }
- if cgroup2 && s.ResourceLimits.Memory != nil && s.ResourceLimits.Memory.Swappiness != nil { // conf.Spec.Linux contains memory swappiness established after the spec process we need to remove that
- s.ResourceLimits.Memory.Swappiness = nil
- if runtimeSpec.Linux.Resources.Memory != nil {
- runtimeSpec.Linux.Resources.Memory.Swappiness = nil
+ if s.ResourceLimits != nil {
+ switch {
+ case s.ResourceLimits.CPU != nil:
+ runtimeSpec.Linux.Resources.CPU = s.ResourceLimits.CPU
+ case s.ResourceLimits.Memory != nil:
+ runtimeSpec.Linux.Resources.Memory = s.ResourceLimits.Memory
+ case s.ResourceLimits.BlockIO != nil:
+ runtimeSpec.Linux.Resources.BlockIO = s.ResourceLimits.BlockIO
+ case s.ResourceLimits.Devices != nil:
+ runtimeSpec.Linux.Resources.Devices = s.ResourceLimits.Devices
}
}
}
- if err != nil {
- return nil, nil, nil, err
- }
if len(s.HostDeviceList) > 0 {
options = append(options, libpod.WithHostDevice(s.HostDeviceList))
}
diff --git a/test/e2e/container_clone_test.go b/test/e2e/container_clone_test.go
index a327bb8ed..1d5944d1a 100644
--- a/test/e2e/container_clone_test.go
+++ b/test/e2e/container_clone_test.go
@@ -146,6 +146,20 @@ var _ = Describe("Podman container clone", func() {
cloneData = cloneInspect.InspectContainerToJSON()
Expect(createData[0].HostConfig.NanoCpus).ToNot(Equal(cloneData[0].HostConfig.NanoCpus))
Expect(cloneData[0].HostConfig.NanoCpus).To(Equal(nanoCPUs))
+
+ create = podmanTest.Podman([]string{"create", ALPINE})
+ create.WaitWithDefaultTimeout()
+ Expect(create).To(Exit(0))
+ clone = podmanTest.Podman([]string{"container", "clone", "--cpus=4", create.OutputToString()})
+ clone.WaitWithDefaultTimeout()
+ Expect(clone).To(Exit(0))
+
+ cloneInspect = podmanTest.Podman([]string{"inspect", clone.OutputToString()})
+ cloneInspect.WaitWithDefaultTimeout()
+ Expect(cloneInspect).To(Exit(0))
+ cloneData = cloneInspect.InspectContainerToJSON()
+ Expect(cloneData[0].HostConfig.MemorySwappiness).To(Equal(int64(0)))
+
})
It("podman container clone in a pod", func() {
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-12-28 06:36:11 +0000