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235 lines
6.8 KiB
235 lines
6.8 KiB
/*
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Copyright © 2019 Thorsten Klein <iwilltry42@gmail.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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package create
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import (
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"fmt"
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"github.com/spf13/cobra"
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cliutil "github.com/rancher/k3d/cmd/util"
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k3dCluster "github.com/rancher/k3d/pkg/cluster"
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"github.com/rancher/k3d/pkg/runtimes"
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k3d "github.com/rancher/k3d/pkg/types"
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log "github.com/sirupsen/logrus"
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)
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// NewCmdCreateCluster returns a new cobra command
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func NewCmdCreateCluster() *cobra.Command {
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// create new command
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cmd := &cobra.Command{
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Use: "cluster",
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Short: "Create a new k3s cluster in docker",
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Long: `Create a new k3s cluster with containerized nodes (k3s in docker).`,
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Args: cobra.ExactArgs(1), // exactly one cluster name can be set // TODO: if not specified, use k3d.DefaultClusterName
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Run: func(cmd *cobra.Command, args []string) {
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runtime, cluster := parseCreateClusterCmd(cmd, args)
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if err := k3dCluster.CreateCluster(cluster, runtime); err != nil {
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log.Fatalln(err)
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}
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},
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}
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// add flags
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cmd.Flags().StringP("api-port", "a", "6443", "Specify the Kubernetes API server port (Format: `--api-port [host:]port`") // TODO: how to handle this for multi-master setups?
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cmd.Flags().IntP("masters", "m", 1, "Specify how many masters you want to create")
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cmd.Flags().IntP("workers", "w", 0, "Specify how many workers you want to create")
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cmd.Flags().String("config", "", "Specify a cluster configuration file") // TODO: to implement
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cmd.Flags().String("image", k3d.DefaultK3sImageRepo, "Specify k3s image that you want to use for the nodes") // TODO: get image version
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cmd.Flags().String("network", "", "Join an existing network")
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cmd.Flags().String("secret", "", "Specify a cluster secret. By default, we generate one.")
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cmd.Flags().StringArrayP("volume", "v", nil, "Mount volumes into the nodes (Format: `--volume [SOURCE:]DEST[@NODEFILTER[;NODEFILTER...]]`")
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cmd.Flags().StringArrayP("port", "p", nil, "Map ports from the node containers to the host (Format: `[IP:][HOSTPORT:]CONTAINERPORT[/PROTOCOL][@NODEFILTER]`)")
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// add subcommands
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// done
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return cmd
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}
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// parseCreateClusterCmd parses the command input into variables required to create a cluster
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func parseCreateClusterCmd(cmd *cobra.Command, args []string) (runtimes.Runtime, *k3d.Cluster) {
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// --runtime
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rt, err := cmd.Flags().GetString("runtime")
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if err != nil {
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log.Fatalln("No runtime specified")
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}
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runtime, err := runtimes.GetRuntime(rt)
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if err != nil {
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log.Fatalln(err)
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}
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// --image
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image, err := cmd.Flags().GetString("image")
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if err != nil {
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log.Errorln("No image specified")
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log.Fatalln(err)
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}
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// --masters
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masterCount, err := cmd.Flags().GetInt("masters")
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if err != nil {
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log.Fatalln(err)
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}
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// TODO: allow more than one master
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if masterCount > 1 {
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log.Fatalln("Only one master node supported right now!")
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}
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// --workers
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workerCount, err := cmd.Flags().GetInt("workers")
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if err != nil {
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log.Fatalln(err)
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}
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// --network
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network, err := cmd.Flags().GetString("network")
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if err != nil {
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log.Fatalln(err)
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}
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// --secret
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secret, err := cmd.Flags().GetString("secret")
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if err != nil {
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log.Fatalln(err)
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}
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// --api-port
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apiPort, err := cmd.Flags().GetString("api-port")
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if err != nil {
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log.Fatalln(err)
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}
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exposeAPI, err := cliutil.ParseAPIPort(apiPort)
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if err != nil {
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log.Fatalln(err)
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}
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// --volume
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volumeFlags, err := cmd.Flags().GetStringArray("volume")
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if err != nil {
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log.Fatalln(err)
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}
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// volumeFilterMap will map volume mounts to applied node filters
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volumeFilterMap := make(map[string]string, 1)
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for _, volumeFlag := range volumeFlags {
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// split node filter from the specified volume
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volume, filter, err := cliutil.SplitFilterFromFlag(volumeFlag)
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if err != nil {
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log.Fatalln(err)
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}
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// validate the specified volume mount and return it in SRC:DEST format
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volume, err = cliutil.ValidateVolumeMount(volume)
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if err != nil {
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log.Fatalln(err)
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}
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// create new entry or append filter to existing entry
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if _, exists := volumeFilterMap[volume]; exists {
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volumeFilterMap[volume] = fmt.Sprintf("%s;%s", volumeFilterMap[volume], filter)
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} else {
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volumeFilterMap[volume] = filter
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}
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}
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// --port
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portFlags, err := cmd.Flags().GetStringArray("port")
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if err != nil {
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log.Fatalln(err)
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}
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portFilterMap := make(map[string]string, 1)
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for _, portFlag := range portFlags {
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// split node filter from the specified volume
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portmap, filter, err := cliutil.SplitFilterFromFlag(portFlag)
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if err != nil {
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log.Fatalln(err)
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}
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// validate the specified volume mount and return it in SRC:DEST format
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portmap, err = cliutil.ValidatePortMap(portmap)
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if err != nil {
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log.Fatalln(err)
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}
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// create new entry or append filter to existing entry
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if _, exists := portFilterMap[portmap]; exists {
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portFilterMap[portmap] = fmt.Sprintf("%s;%s", portFilterMap[portmap], filter)
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} else {
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portFilterMap[portmap] = filter
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}
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}
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/* generate cluster */
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cluster := &k3d.Cluster{
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Name: args[0], // TODO: validate name0
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Network: network,
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Secret: secret,
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}
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// generate list of nodes
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cluster.Nodes = []*k3d.Node{}
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// -> master nodes
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for i := 0; i < masterCount; i++ {
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node := k3d.Node{
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Role: k3d.MasterRole,
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Image: image,
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MasterOpts: k3d.MasterOpts{},
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}
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// expose API Port
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if i == 0 { // TODO:
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node.MasterOpts.ExposeAPI = exposeAPI
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}
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// append node to list
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cluster.Nodes = append(cluster.Nodes, &node)
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}
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// -> worker nodes
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for i := 0; i < workerCount; i++ {
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node := k3d.Node{
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Role: k3d.WorkerRole,
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Image: image,
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}
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cluster.Nodes = append(cluster.Nodes, &node)
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}
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// append volumes
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for volume, filter := range volumeFilterMap {
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nodes, err := cliutil.FilterNodes(cluster.Nodes, filter)
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if err != nil {
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log.Fatalln(err)
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}
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for _, node := range nodes {
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node.Volumes = append(node.Volumes, volume)
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}
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}
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return runtime, cluster
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}
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