move label keys into docker provider

pkg/cluster/constants/constants.go

@@ -20,25 +20,6 @@ package constants
 // DefaultClusterName is the default cluster Context name
 const DefaultClusterName = "kind"
 
-// TODO: the requirements for labels may vary by provider, these should probably
-// be per-provider (though commonly the same)
-
-// ClusterLabelKey is applied to each "node" docker container for identification
-const ClusterLabelKey = "io.x-k8s.kind.cluster"
-
-// DeprecatedClusterLabelKey is applied to each "node" docker container for identification
-// This is the deprecated value of ClusterLabelKey, and will be removed in a future release
-const DeprecatedClusterLabelKey = "io.k8s.sigs.kind.cluster"
-
-// NodeRoleLabelKey is applied to each "node" docker container for categorization
-// of nodes by role
-const NodeRoleLabelKey = "io.x-k8s.kind.role"
-
-// DeprecatedNodeRoleLabelKey is applied to each "node" docker container for categorization
-// of nodes by role.
-// This is the deprecated value of NodeRoleKey, and will be removed in a future release
-const DeprecatedNodeRoleLabelKey = "io.k8s.sigs.kind.role"
-
 /* node role value constants */
 const (
 	// ControlPlaneNodeRoleValue identifies a node that hosts a Kubernetes

pkg/internal/cluster/providers/docker/constants.go

@@ -0,0 +1,33 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or impliep.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package docker
+
+// clusterLabelKey is applied to each "node" docker container for identification
+const clusterLabelKey = "io.x-k8s.kind.cluster"
+
+// deprecatedClusterLabelKey is applied to each "node" docker container for identification
+// This is the deprecated value of ClusterLabelKey, and will be removed in a future release
+const deprecatedClusterLabelKey = "io.k8s.sigs.kind.cluster"
+
+// nodeRoleLabelKey is applied to each "node" docker container for categorization
+// of nodes by role
+const nodeRoleLabelKey = "io.x-k8s.kind.role"
+
+// DeprecatedNodeRoleLabelKey is applied to each "node" docker container for categorization
+// of nodes by role.
+// This is the deprecated value of NodeRoleKey, and will be removed in a future release
+const deprecatedNodeRoleLabelKey = "io.k8s.sigs.kind.role"

pkg/internal/cluster/providers/docker/node.go

@@ -21,7 +21,6 @@ import (
 	"io"
 	"strings"
 
-	"sigs.k8s.io/kind/pkg/cluster/constants"
 	"sigs.k8s.io/kind/pkg/errors"
 	"sigs.k8s.io/kind/pkg/exec"
 )
@@ -37,7 +36,7 @@ func (n *node) String() string {
 
 func (n *node) Role() (string, error) {
 	cmd := exec.Command("docker", "inspect",
-		"--format", fmt.Sprintf(`{{ index .Config.Labels "%s"}}`, constants.DeprecatedNodeRoleLabelKey),
+		"--format", fmt.Sprintf(`{{ index .Config.Labels "%s"}}`, deprecatedNodeRoleLabelKey),
 		n.name,
 	)
 	lines, err := exec.OutputLines(cmd)

pkg/internal/cluster/providers/docker/provider.go

@@ -23,7 +23,6 @@ import (
 
 	"k8s.io/apimachinery/pkg/util/sets"
 
-	"sigs.k8s.io/kind/pkg/cluster/constants"
 	"sigs.k8s.io/kind/pkg/cluster/nodes"
 	"sigs.k8s.io/kind/pkg/errors"
 	"sigs.k8s.io/kind/pkg/exec"
@@ -78,9 +77,9 @@ func (p *Provider) ListClusters() ([]string, error) {
 		"-a",         // show stopped nodes
 		"--no-trunc", // don't truncate
 		// filter for nodes with the cluster label
-		"--filter", "label="+constants.DeprecatedClusterLabelKey,
+		"--filter", "label="+deprecatedClusterLabelKey,
 		// format to include the cluster name
-		"--format", fmt.Sprintf(`{{.Label "%s"}}`, constants.DeprecatedClusterLabelKey),
+		"--format", fmt.Sprintf(`{{.Label "%s"}}`, deprecatedClusterLabelKey),
 	)
 	lines, err := exec.OutputLines(cmd)
 	if err != nil {
@@ -97,7 +96,7 @@ func (p *Provider) ListNodes(cluster string) ([]nodes.Node, error) {
 		"-a",         // show stopped nodes
 		"--no-trunc", // don't truncate
 		// filter for nodes with the cluster label
-		"--filter", fmt.Sprintf("label=%s=%s", constants.DeprecatedClusterLabelKey, cluster),
+		"--filter", fmt.Sprintf("label=%s=%s", deprecatedClusterLabelKey, cluster),
 		// format to include the cluster name
 		"--format", `{{.Names}}`,
 	)

pkg/internal/cluster/providers/docker/provision.go

@@ -132,8 +132,8 @@ func commonArgs(cluster string, cfg *config.Cluster) ([]string, error) {
 		"--detach", // run the container detached
 		"--tty",    // allocate a tty for entrypoint logs
 		// label the node with the cluster ID
-		"--label", fmt.Sprintf("%s=%s", constants.ClusterLabelKey, cluster),
+		"--label", fmt.Sprintf("%s=%s", clusterLabelKey, cluster),
-		"--label", fmt.Sprintf("%s=%s", constants.DeprecatedClusterLabelKey, cluster),
+		"--label", fmt.Sprintf("%s=%s", deprecatedClusterLabelKey, cluster),
 	}
 
 	// enable IPv6 if necessary
@@ -163,8 +163,8 @@ func runArgsForNode(node *config.Node, name string, args []string) []string {
 		"--hostname", name, // make hostname match container name
 		"--name", name, // ... and set the container name
 		// label the node with the role ID
-		"--label", fmt.Sprintf("%s=%s", constants.NodeRoleLabelKey, node.Role),
+		"--label", fmt.Sprintf("%s=%s", nodeRoleLabelKey, node.Role),
-		"--label", fmt.Sprintf("%s=%s", constants.DeprecatedNodeRoleLabelKey, node.Role),
+		"--label", fmt.Sprintf("%s=%s", deprecatedNodeRoleLabelKey, node.Role),
 		// running containers in a container requires privileged
 		// NOTE: we could try to replicate this with --cap-add, and use less
 		// privileges, but this flag also changes some mounts that are necessary
@@ -201,8 +201,8 @@ func runArgsForLoadBalancer(cfg *config.Cluster, name string, args []string) ([]
 		"--hostname", name, // make hostname match container name
 		"--name", name, // ... and set the container name
 		// label the node with the role ID
-		"--label", fmt.Sprintf("%s=%s", constants.DeprecatedNodeRoleLabelKey, constants.ExternalLoadBalancerNodeRoleValue),
+		"--label", fmt.Sprintf("%s=%s", deprecatedNodeRoleLabelKey, constants.ExternalLoadBalancerNodeRoleValue),
-		"--label", fmt.Sprintf("%s=%s", constants.NodeRoleLabelKey, constants.ExternalLoadBalancerNodeRoleValue),
+		"--label", fmt.Sprintf("%s=%s", nodeRoleLabelKey, constants.ExternalLoadBalancerNodeRoleValue),
 	},
 		args...,
 	)