add size limit to emptydir (#228)

vsoch · web-flow · commit 2412b6e5d74e · 2024-06-28T23:58:51.000-06:00
* add size limit to emptydir

Signed-off-by: vsoch &lt;vsoch@users.noreply.github.com&gt;
diff --git a/api/v1alpha2/minicluster_types.go b/api/v1alpha2/minicluster_types.go
@@ -255,6 +255,10 @@ type ContainerVolume struct {
 	// +optional
 	EmptyDirMedium string `json:"emptyDirMedium,omitempty"`
 
+	// Add an empty directory sizeLimit
+	// +optional
+	EmptyDirSizeLimit string `json:"emptyDirSizeLimit,omitempty"`
+
 	// +kubebuilder:default=false
 	// +default=false
 	// +optional
diff --git a/api/v1alpha2/swagger.json b/api/v1alpha2/swagger.json
@@ -129,6 +129,10 @@
           "description": "Add an empty directory custom type",
           "type": "string"
         },
+        "emptyDirSizeLimit": {
+          "description": "Add an empty directory sizeLimit",
+          "type": "string"
+        },
         "hostPath": {
           "description": "An existing hostPath to bind to path",
           "type": "string"
diff --git a/api/v1alpha2/zz_generated.openapi.go b/api/v1alpha2/zz_generated.openapi.go
diff --git a/chart/templates/minicluster-crd.yaml b/chart/templates/minicluster-crd.yaml
@@ -233,6 +233,9 @@ spec:
                           emptyDirMedium:
                             description: Add an empty directory custom type
                             type: string
+                          emptyDirSizeLimit:
+                            description: Add an empty directory sizeLimit
+                            type: string
                           hostPath:
                             description: An existing hostPath to bind to path
                             type: string
@@ -732,6 +735,9 @@ spec:
                           emptyDirMedium:
                             description: Add an empty directory custom type
                             type: string
+                          emptyDirSizeLimit:
+                            description: Add an empty directory sizeLimit
+                            type: string
                           hostPath:
                             description: An existing hostPath to bind to path
                             type: string
diff --git a/config/crd/bases/flux-framework.org_miniclusters.yaml b/config/crd/bases/flux-framework.org_miniclusters.yaml
@@ -232,6 +232,9 @@ spec:
                           emptyDirMedium:
                             description: Add an empty directory custom type
                             type: string
+                          emptyDirSizeLimit:
+                            description: Add an empty directory sizeLimit
+                            type: string
                           hostPath:
                             description: An existing hostPath to bind to path
                             type: string
@@ -735,6 +738,9 @@ spec:
                           emptyDirMedium:
                             description: Add an empty directory custom type
                             type: string
+                          emptyDirSizeLimit:
+                            description: Add an empty directory sizeLimit
+                            type: string
                           hostPath:
                             description: An existing hostPath to bind to path
                             type: string
diff --git a/controllers/flux/volumes.go b/controllers/flux/volumes.go
@@ -16,6 +16,7 @@ import (
 	api "github.com/flux-framework/flux-operator/api/v1alpha2"
 
 	corev1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
 )
 
 // Shared function to return consistent set of volume mounts
@@ -147,6 +148,10 @@ func getExistingVolumes(existing map[string]api.ContainerVolume) []corev1.Volume
 					},
 				},
 			}
+			if volumeMeta.EmptyDirSizeLimit != "" {
+				sizeLimit := resource.MustParse(volumeMeta.EmptyDirSizeLimit)
+				newVolume.VolumeSource.EmptyDir.SizeLimit = &sizeLimit
+			}
 
 		} else if volumeMeta.HostPath != "" {
 			newVolume = corev1.Volume{
diff --git a/docs/getting_started/custom-resource-definition.md b/docs/getting_started/custom-resource-definition.md
@@ -1213,7 +1213,16 @@ spec:
 ```
 
 The default binds to the path `/dev/shm` and is not customizable. This can be changed if needed. When you have the "memory" medium added,
-you should see all the shared memory from the host, which is [calculated here](https://github.com/kubernetes/kubernetes/blob/e6616033cb844516b1e91b3ec7cd30f8c5d1ea50/pkg/volume/emptydir/empty_dir.go#L148-L157).
+you should see all the shared memory from the host, which is [calculated here](https://github.com/kubernetes/kubernetes/blob/e6616033cb844516b1e91b3ec7cd30f8c5d1ea50/pkg/volume/emptydir/empty_dir.go#L148-L157). In addition, you can set a sizeLimit:
+
+```yaml
+        # must be lowercase!
+        my-empty-dir:
+          emptyDir: true
+          emptyDirMedium: "memory"
+          sizeLimit: "64Gi"
+```
+
 As an example, here is output from a local run with kind when shared memory is added:
 
 ```console
diff --git a/examples/dist/flux-operator-arm.yaml b/examples/dist/flux-operator-arm.yaml
@@ -238,6 +238,9 @@ spec:
                           emptyDirMedium:
                             description: Add an empty directory custom type
                             type: string
+                          emptyDirSizeLimit:
+                            description: Add an empty directory sizeLimit
+                            type: string
                           hostPath:
                             description: An existing hostPath to bind to path
                             type: string
@@ -741,6 +744,9 @@ spec:
                           emptyDirMedium:
                             description: Add an empty directory custom type
                             type: string
+                          emptyDirSizeLimit:
+                            description: Add an empty directory sizeLimit
+                            type: string
                           hostPath:
                             description: An existing hostPath to bind to path
                             type: string
diff --git a/examples/dist/flux-operator.yaml b/examples/dist/flux-operator.yaml
@@ -238,6 +238,9 @@ spec:
                           emptyDirMedium:
                             description: Add an empty directory custom type
                             type: string
+                          emptyDirSizeLimit:
+                            description: Add an empty directory sizeLimit
+                            type: string
                           hostPath:
                             description: An existing hostPath to bind to path
                             type: string
@@ -741,6 +744,9 @@ spec:
                           emptyDirMedium:
                             description: Add an empty directory custom type
                             type: string
+                          emptyDirSizeLimit:
+                            description: Add an empty directory sizeLimit
+                            type: string
                           hostPath:
                             description: An existing hostPath to bind to path
                             type: string
diff --git a/sdk/python/v1alpha2/docs/ContainerVolume.md b/sdk/python/v1alpha2/docs/ContainerVolume.md
@@ -8,6 +8,7 @@ Name | Type | Description | Notes
 **config_map_name** | **str** | Config map name if the existing volume is a config map You should also define items if you are using this | [optional] 
 **empty_dir** | **bool** |  | [optional] [default to False]
 **empty_dir_medium** | **str** | Add an empty directory custom type | [optional] 
+**empty_dir_size_limit** | **str** | Add an empty directory sizeLimit | [optional] 
 **host_path** | **str** | An existing hostPath to bind to path | [optional] 
 **items** | **dict[str, str]** | Items (key and paths) for the config map | [optional] 
 **path** | **str** | Path and claim name are always required if a secret isn&#39;t defined | [optional] 
diff --git a/sdk/python/v1alpha2/fluxoperator/models/container_volume.py b/sdk/python/v1alpha2/fluxoperator/models/container_volume.py
@@ -40,6 +40,7 @@ class ContainerVolume(object):
         'config_map_name': 'str',
         'empty_dir': 'bool',
         'empty_dir_medium': 'str',
+        'empty_dir_size_limit': 'str',
         'host_path': 'str',
         'items': 'dict[str, str]',
         'path': 'str',
@@ -52,14 +53,15 @@ class ContainerVolume(object):
         'config_map_name': 'configMapName',
         'empty_dir': 'emptyDir',
         'empty_dir_medium': 'emptyDirMedium',
+        'empty_dir_size_limit': 'emptyDirSizeLimit',
         'host_path': 'hostPath',
         'items': 'items',
         'path': 'path',
         'read_only': 'readOnly',
         'secret_name': 'secretName'
     }
 
-    def __init__(self, claim_name=None, config_map_name=None, empty_dir=False, empty_dir_medium=None, host_path=None, items=None, path=None, read_only=False, secret_name=None, local_vars_configuration=None):  # noqa: E501
+    def __init__(self, claim_name=None, config_map_name=None, empty_dir=False, empty_dir_medium=None, empty_dir_size_limit=None, host_path=None, items=None, path=None, read_only=False, secret_name=None, local_vars_configuration=None):  # noqa: E501
         """ContainerVolume - a model defined in OpenAPI"""  # noqa: E501
         if local_vars_configuration is None:
             local_vars_configuration = Configuration.get_default_copy()
@@ -69,6 +71,7 @@ def __init__(self, claim_name=None, config_map_name=None, empty_dir=False, empty
         self._config_map_name = None
         self._empty_dir = None
         self._empty_dir_medium = None
+        self._empty_dir_size_limit = None
         self._host_path = None
         self._items = None
         self._path = None
@@ -84,6 +87,8 @@ def __init__(self, claim_name=None, config_map_name=None, empty_dir=False, empty
             self.empty_dir = empty_dir
         if empty_dir_medium is not None:
             self.empty_dir_medium = empty_dir_medium
+        if empty_dir_size_limit is not None:
+            self.empty_dir_size_limit = empty_dir_size_limit
         if host_path is not None:
             self.host_path = host_path
         if items is not None:
@@ -185,6 +190,29 @@ def empty_dir_medium(self, empty_dir_medium):
 
         self._empty_dir_medium = empty_dir_medium
 
+    @property
+    def empty_dir_size_limit(self):
+        """Gets the empty_dir_size_limit of this ContainerVolume.  # noqa: E501
+
+        Add an empty directory sizeLimit  # noqa: E501
+
+        :return: The empty_dir_size_limit of this ContainerVolume.  # noqa: E501
+        :rtype: str
+        """
+        return self._empty_dir_size_limit
+
+    @empty_dir_size_limit.setter
+    def empty_dir_size_limit(self, empty_dir_size_limit):
+        """Sets the empty_dir_size_limit of this ContainerVolume.
+
+        Add an empty directory sizeLimit  # noqa: E501
+
+        :param empty_dir_size_limit: The empty_dir_size_limit of this ContainerVolume.  # noqa: E501
+        :type empty_dir_size_limit: str
+        """
+
+        self._empty_dir_size_limit = empty_dir_size_limit
+
     @property
     def host_path(self):
         """Gets the host_path of this ContainerVolume.  # noqa: E501
