github.com/mirantis/virtlet@v1.5.2-0.20191204181327-1659b8a48e9b/pkg/libvirttools/diag.go (about)

     1  /*
     2  Copyright 2018 Mirantis
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package libvirttools
    18  
    19  import (
    20  	"fmt"
    21  
    22  	libvirtxml "github.com/libvirt/libvirt-go-xml"
    23  
    24  	"github.com/Mirantis/virtlet/pkg/diag"
    25  	"github.com/Mirantis/virtlet/pkg/virt"
    26  )
    27  
    28  // LibvirtDiagSource dumps libvirt domains, storage pools and storage
    29  // volumes as a set of XML files.
    30  type LibvirtDiagSource struct {
    31  	domainConn  virt.DomainConnection
    32  	storageConn virt.StorageConnection
    33  }
    34  
    35  var _ diag.Source = &LibvirtDiagSource{}
    36  
    37  // NewLibvirtDiagSource creates a new LibvirtDiagSource.
    38  func NewLibvirtDiagSource(domainConn virt.DomainConnection, storageConn virt.StorageConnection) *LibvirtDiagSource {
    39  	return &LibvirtDiagSource{
    40  		domainConn:  domainConn,
    41  		storageConn: storageConn,
    42  	}
    43  }
    44  
    45  func (s *LibvirtDiagSource) listDomains(dr *diag.Result) error {
    46  	domains, err := s.domainConn.ListDomains()
    47  	if err != nil {
    48  		return fmt.Errorf("error listing domains: %v", err)
    49  	}
    50  	for _, d := range domains {
    51  		xml, err := d.XML()
    52  		if err != nil {
    53  			return fmt.Errorf("error getting domain xml: %v", err)
    54  		}
    55  		if err := addLibvirtXMLToDiagResult("domain", xml.Name, xml, dr); err != nil {
    56  			return err
    57  		}
    58  	}
    59  	return nil
    60  }
    61  
    62  func (s *LibvirtDiagSource) listPoolsAndVolumes(dr *diag.Result) error {
    63  	pools, err := s.storageConn.ListPools()
    64  	if err != nil {
    65  		return fmt.Errorf("error listing pools: %v", err)
    66  	}
    67  	for _, p := range pools {
    68  		xml, err := p.XML()
    69  		if err != nil {
    70  			return fmt.Errorf("error getting domain xml: %v", err)
    71  		}
    72  		if err := addLibvirtXMLToDiagResult("pool", xml.Name, xml, dr); err != nil {
    73  			return err
    74  		}
    75  		if err := s.listVolumes(p, dr); err != nil {
    76  			return err
    77  		}
    78  	}
    79  	return nil
    80  }
    81  
    82  func (s *LibvirtDiagSource) listVolumes(p virt.StoragePool, dr *diag.Result) error {
    83  	vols, err := p.ListVolumes()
    84  	if err != nil {
    85  		return fmt.Errorf("error listing volumes: %v", err)
    86  	}
    87  	for _, v := range vols {
    88  		xml, err := v.XML()
    89  		if err != nil {
    90  			return fmt.Errorf("error getting domain xml: %v", err)
    91  		}
    92  		if err := addLibvirtXMLToDiagResult("volume", xml.Name, xml, dr); err != nil {
    93  			return err
    94  		}
    95  	}
    96  	return nil
    97  }
    98  
    99  // DiagnosticInfo implements DiagnosticInfo method of the Source
   100  // interface.
   101  func (s *LibvirtDiagSource) DiagnosticInfo() (diag.Result, error) {
   102  	dr := diag.Result{
   103  		IsDir:    true,
   104  		Children: make(map[string]diag.Result),
   105  	}
   106  	err := s.listDomains(&dr)
   107  	if err == nil {
   108  		err = s.listPoolsAndVolumes(&dr)
   109  	}
   110  	if err != nil {
   111  		return diag.Result{}, err
   112  	}
   113  	return dr, nil
   114  }
   115  
   116  func addLibvirtXMLToDiagResult(objType, name string, xml libvirtxml.Document, dr *diag.Result) error {
   117  	out, err := xml.Marshal()
   118  	if err != nil {
   119  		return fmt.Errorf("error marshalling the pool to xml: %v", err)
   120  	}
   121  	fileName := fmt.Sprintf("%s-%s", objType, name)
   122  	dr.Children[fileName] = diag.Result{
   123  		Name: fileName,
   124  		Ext:  "xml",
   125  		Data: out,
   126  	}
   127  	return nil
   128  }