Added insecure_options config list

Author: kmalec

client/driver/rkt.go

@@ -81,6 +81,7 @@ type RktDriverConfig struct {
 	PortMapRaw       []map[string]string `mapstructure:"port_map"`           //
 	PortMap          map[string]string   `mapstructure:"-"`                  // A map of host port and the port name defined in the image manifest file
 	Volumes          []string            `mapstructure:"volumes"`            // Host-Volumes to mount in, syntax: /path/to/host/directory:/destination/path/in/container
+	InsecureOptions  []string            `mapstructure:"insecure_options"`   // list of args for --insecure-options
 
 	Debug bool `mapstructure:"debug"` // Enable debug option for rkt command
 }
@@ -155,6 +156,9 @@ func (d *RktDriver) Validate(config map[string]interface{}) error {
 			"volumes": &fields.FieldSchema{
 				Type: fields.TypeArray,
 			},
+			"insecure_options": &fields.FieldSchema{
+				Type: fields.TypeArray,
+			},
 		},
 	}
 
@@ -262,6 +266,18 @@ func (d *RktDriver) Start(ctx *ExecContext, task *structs.Task) (DriverHandle, e
 		// Disble signature verification if the trust command was not run.
 		insecure = true
 	}
+
+	// if we have a selective insecure_options, prefer them
+	// insecure options are rkt's global argument, so we do this before the actual "run"
+	if len(driverConfig.InsecureOptions) > 0 {
+		cmdArgs = append(cmdArgs, fmt.Sprintf("--insecure-options=%s", strings.Join(driverConfig.InsecureOptions, ",")))
+	} else if insecure {
+		cmdArgs = append(cmdArgs, "--insecure-options=all")
+	}
+
+	// same for debug
+	cmdArgs = append(cmdArgs, fmt.Sprintf("--debug=%t", debug))
+
 	cmdArgs = append(cmdArgs, "run")
 
 	// Write the UUID out to a file in the state dir so we can read it back
@@ -304,10 +320,6 @@ func (d *RktDriver) Start(ctx *ExecContext, task *structs.Task) (DriverHandle, e
 	}
 
 	cmdArgs = append(cmdArgs, img)
-	if insecure {
-		cmdArgs = append(cmdArgs, "--insecure-options=all")
-	}
-	cmdArgs = append(cmdArgs, fmt.Sprintf("--debug=%t", debug))
 
 	// Inject environment variables
 	for k, v := range ctx.TaskEnv.Map() {

website/source/docs/drivers/rkt.html.md

@@ -62,7 +62,19 @@ The `rkt` driver supports the following configuration in the job spec:
 
 * `trust_prefix` - (Optional) The trust prefix to be passed to rkt. Must be
   reachable from the box running the nomad agent. If not specified, the image is
-  run without verifying the image signature.
+  run with ```--insecure-options=all```.
+
+* `insecure_options` - (Optional) List of insecure options for rkt. Consult ```rkt --help```
+  for list of supported values. This list overrides the ```--insecure-options=all``` when
+  no ```trust_prefix``` is provided in the job config, which can be effectively used to enforce
+  secure runs, using ```insecure_options = ["none"]``` option.
+
+  ```hcl
+  config {
+      image = "example.com/image:1.0"
+      insecure_options = ["image", "tls", "ondisk"]
+  }
+  ```
 
 * `dns_servers` - (Optional) A list of DNS servers to be used in the container.
   Alternatively a list containing just `host` or `none`. `host` uses the host's