Print a warning if user-selected —etcd-servers setting is overwritten.

Author: Levi Blackstone

cmd/bootkube/render.go

@@ -13,6 +13,7 @@ import (
 	"github.com/spf13/cobra"
 
 	"github.com/kubernetes-incubator/bootkube/pkg/asset"
+	"github.com/kubernetes-incubator/bootkube/pkg/bootkube"
 	"github.com/kubernetes-incubator/bootkube/pkg/tlsutil"
 )
 
@@ -21,6 +22,7 @@ const (
 	dnsOffset            = 10
 	etcdOffset           = 15
 	defaultServiceBaseIP = "10.3.0.0"
+	defaultEtcdServers   = "http://127.0.0.1:2379"
 )
 
 var (
@@ -53,7 +55,7 @@ func init() {
 	cmdRender.Flags().StringVar(&renderOpts.assetDir, "asset-dir", "", "Output path for rendered assets")
 	cmdRender.Flags().StringVar(&renderOpts.caCertificatePath, "ca-certificate-path", "", "Path to an existing PEM encoded CA. If provided, TLS assets will be generated using this certificate authority.")
 	cmdRender.Flags().StringVar(&renderOpts.caPrivateKeyPath, "ca-private-key-path", "", "Path to an existing Certificate Authority RSA private key. Required if --ca-certificate is set.")
-	cmdRender.Flags().StringVar(&renderOpts.etcdServers, "etcd-servers", "http://127.0.0.1:2379", "List of etcd servers URLs including host:port, comma separated")
+	cmdRender.Flags().StringVar(&renderOpts.etcdServers, "etcd-servers", defaultEtcdServers, "List of etcd servers URLs including host:port, comma separated")
 	cmdRender.Flags().StringVar(&renderOpts.apiServers, "api-servers", "https://127.0.0.1:443", "List of API server URLs including host:port, commma seprated")
 	cmdRender.Flags().StringVar(&renderOpts.altNames, "api-server-alt-names", "", "List of SANs to use in api-server certificate. Example: 'IP=127.0.0.1,IP=127.0.0.2,DNS=localhost'. If empty, SANs will be extracted from the --api-servers flag.")
 	cmdRender.Flags().StringVar(&renderOpts.podCIDR, "pod-cidr", "10.2.0.0/16", "The CIDR range of cluster pods.")
@@ -156,6 +158,10 @@ func flagsToAssetConfig() (c *asset.Config, err error) {
 		}
 
 		etcdServers = append(etcdServers, etcdServerUrl)
+
+		if renderOpts.etcdServers != defaultEtcdServers {
+			bootkube.UserOutput("--experimental-self-hosted-etcd and --service-cidr set. Overriding --etcd-servers setting with %s\n", etcdServers)
+		}
 	} else {
 		etcdServers, err = parseURLs(renderOpts.etcdServers)
 		if err != nil {