introduce pull policy "refresh"

Signed-off-by: Nicolas De Loof <[email protected]>

schema/compose-spec.json

@@ -371,8 +371,9 @@
         "privileged": {"type": ["boolean", "string"]},
         "profiles": {"$ref": "#/definitions/list_of_strings"},
         "pull_policy": {"type": "string", "enum": [
-          "always", "never", "if_not_present", "build", "missing"
+          "always", "never", "if_not_present", "build", "missing", "refresh"
         ]},
+        "pull_refresh_after": {"type": "string"},
         "read_only": {"type": ["boolean", "string"]},
         "restart": {"type": "string"},
         "runtime": {

types/types.go

@@ -111,6 +111,7 @@ type ServiceConfig struct {
 	Ports           []ServicePortConfig              `yaml:"ports,omitempty" json:"ports,omitempty"`
 	Privileged      bool                             `yaml:"privileged,omitempty" json:"privileged,omitempty"`
 	PullPolicy      string                           `yaml:"pull_policy,omitempty" json:"pull_policy,omitempty"`
+	PullRefresh     *Duration                        `yaml:"pull_refresh_after,omitempty" json:"pull_refresh_after,omitempty"`
 	ReadOnly        bool                             `yaml:"read_only,omitempty" json:"read_only,omitempty"`
 	Restart         string                           `yaml:"restart,omitempty" json:"restart,omitempty"`
 	Runtime         string                           `yaml:"runtime,omitempty" json:"runtime,omitempty"`
@@ -215,6 +216,8 @@ const (
 	PullPolicyMissing = "missing"
 	// PullPolicyBuild force building images
 	PullPolicyBuild = "build"
+	// PullPolicyRefresh checks image needs to be updatedq
+	PullPolicyRefresh = "refresh"
 )
 
 const (