github.com/1aal/kubeblocks@v0.0.0-20231107070852-e1c03e598921/pkg/cli/cmd/class/list.go (about)

     1  /*
     2  Copyright (C) 2022-2023 ApeCloud Co., Ltd
     3  
     4  This file is part of KubeBlocks project
     5  
     6  This program is free software: you can redistribute it and/or modify
     7  it under the terms of the GNU Affero General Public License as published by
     8  the Free Software Foundation, either version 3 of the License, or
     9  (at your option) any later version.
    10  
    11  This program is distributed in the hope that it will be useful
    12  but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  GNU Affero General Public License for more details.
    15  
    16  You should have received a copy of the GNU Affero General Public License
    17  along with this program.  If not, see <http://www.gnu.org/licenses/>.
    18  */
    19  
    20  package class
    21  
    22  import (
    23  	"fmt"
    24  	"sort"
    25  	"strings"
    26  
    27  	"github.com/spf13/cobra"
    28  	"k8s.io/apimachinery/pkg/api/resource"
    29  	"k8s.io/cli-runtime/pkg/genericiooptions"
    30  	"k8s.io/client-go/dynamic"
    31  	cmdutil "k8s.io/kubectl/pkg/cmd/util"
    32  	"k8s.io/kubectl/pkg/util/templates"
    33  
    34  	"github.com/1aal/kubeblocks/pkg/class"
    35  	"github.com/1aal/kubeblocks/pkg/cli/printer"
    36  	"github.com/1aal/kubeblocks/pkg/cli/util"
    37  	"github.com/1aal/kubeblocks/pkg/cli/util/flags"
    38  )
    39  
    40  type ListOptions struct {
    41  	ClusterDefRef string
    42  	Factory       cmdutil.Factory
    43  	dynamic       dynamic.Interface
    44  	genericiooptions.IOStreams
    45  }
    46  
    47  var listClassExamples = templates.Examples(`
    48      # List all components classes in cluster definition apecloud-mysql
    49      kbcli class list --cluster-definition apecloud-mysql
    50  `)
    51  
    52  func NewListCommand(f cmdutil.Factory, streams genericiooptions.IOStreams) *cobra.Command {
    53  	o := &ListOptions{IOStreams: streams}
    54  	cmd := &cobra.Command{
    55  		Use:     "list",
    56  		Short:   "List classes",
    57  		Example: listClassExamples,
    58  		Run: func(cmd *cobra.Command, args []string) {
    59  			util.CheckErr(o.complete(f))
    60  			util.CheckErr(o.run())
    61  		},
    62  	}
    63  	flags.AddClusterDefinitionFlag(f, cmd, &o.ClusterDefRef)
    64  	util.CheckErr(cmd.MarkFlagRequired("cluster-definition"))
    65  	return cmd
    66  }
    67  
    68  func (o *ListOptions) complete(f cmdutil.Factory) error {
    69  	var err error
    70  	o.dynamic, err = f.DynamicClient()
    71  	return err
    72  }
    73  
    74  func (o *ListOptions) run() error {
    75  	clsMgr, err := GetManager(o.dynamic, o.ClusterDefRef)
    76  	if err != nil {
    77  		return err
    78  	}
    79  	for compName, classes := range clsMgr.GetClasses() {
    80  		o.printClass(compName, classes)
    81  	}
    82  	return nil
    83  }
    84  
    85  func (o *ListOptions) printClass(compName string, classes []*class.ComponentClassWithRef) {
    86  	tbl := printer.NewTablePrinter(o.Out)
    87  	tbl.SetHeader("COMPONENT", "CLASS", "CPU", "MEMORY")
    88  	sort.Sort(class.ByClassResource(classes))
    89  	for _, cls := range classes {
    90  		tbl.AddRow(compName, cls.Name, cls.CPU.String(), normalizeMemory(cls.Memory))
    91  	}
    92  	tbl.Print()
    93  }
    94  
    95  func normalizeMemory(mem resource.Quantity) string {
    96  	if !strings.HasSuffix(mem.String(), "m") {
    97  		return mem.String()
    98  	}
    99  
   100  	var (
   101  		value  float64
   102  		suffix string
   103  		bytes  = float64(mem.MilliValue()) / 1000
   104  	)
   105  	switch {
   106  	case bytes < 1024:
   107  		value = bytes / 1024
   108  		suffix = "Ki"
   109  	case bytes < 1024*1024:
   110  		value = bytes / 1024 / 1024
   111  		suffix = "Mi"
   112  	case bytes < 1024*1024*1024:
   113  		value = bytes / 1024 / 1024 / 1024
   114  		suffix = "Gi"
   115  	default:
   116  		value = bytes / 1024 / 1024 / 1024 / 1024
   117  		suffix = "Ti"
   118  	}
   119  	return strings.TrimRight(fmt.Sprintf("%.3f", value), "0") + suffix
   120  }