1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
package libvirt
import (
"errors"
"fmt"
"log"
"os"
"strings"
"time"
"github.com/davecgh/go-spew/spew"
"github.com/hashicorp/terraform/helper/resource"
libvirt "github.com/libvirt/libvirt-go"
"github.com/libvirt/libvirt-go-xml"
)
const skipQemuEnvVar = "TF_SKIP_QEMU_AGENT"
const domWaitLeaseStillWaiting = "waiting-addresses"
const domWaitLeaseDone = "all-addresses-obtained"
var errDomainInvalidState = errors.New("invalid state for domain")
func domainWaitForLeases(domain *libvirt.Domain, waitForLeases map[libvirtxml.DomainInterface]struct{}, timeout time.Duration) error {
waitFunc := func() (interface{}, string, error) {
state, err := domainGetState(*domain)
if err != nil {
return false, "", err
}
for _, fatalState := range []string{"crashed", "shutoff", "shutdown", "pmsuspended"} {
if state == fatalState {
return false, "", errDomainInvalidState
}
}
if state != "running" {
return false, domWaitLeaseStillWaiting, nil
}
// check we have IPs for all the interfaces we are waiting for
for iface := range waitForLeases {
found, ignore, err := domainIfaceHasAddress(*domain, iface)
if err != nil {
return false, "", err
}
if ignore {
log.Printf("[DEBUG] we don't care about the IP address for %+v", iface)
continue
}
if !found {
log.Printf("[DEBUG] IP address not found for iface=%+v: will try in a while", strings.ToUpper(iface.MAC.Address))
return false, domWaitLeaseStillWaiting, nil
}
}
log.Printf("[DEBUG] all the %d IP addresses obtained for the domain", len(waitForLeases))
return true, domWaitLeaseDone, nil
}
stateConf := &resource.StateChangeConf{
Pending: []string{domWaitLeaseStillWaiting},
Target: []string{domWaitLeaseDone},
Refresh: waitFunc,
Timeout: timeout,
MinTimeout: 10 * time.Second,
Delay: 5 * time.Second,
}
_, err := stateConf.WaitForState()
log.Print("[DEBUG] wait-for-leases was successful")
return err
}
func domainIfaceHasAddress(domain libvirt.Domain, iface libvirtxml.DomainInterface) (found bool, ignore bool, err error) {
mac := strings.ToUpper(iface.MAC.Address)
if mac == "" {
log.Printf("[DEBUG] Can't wait without a MAC address: ignoring interface %+v.\n", iface)
// we can't get the ip without a mac address
return false, true, nil
}
log.Printf("[DEBUG] waiting for network address for iface=%s\n", mac)
ifacesWithAddr, err := domainGetIfacesInfo(domain)
if err != nil {
return false, false, fmt.Errorf("Error retrieving interface addresses: %s", err)
}
log.Printf("[DEBUG] ifaces with addresses: %+v\n", ifacesWithAddr)
for _, ifaceWithAddr := range ifacesWithAddr {
if mac == strings.ToUpper(ifaceWithAddr.Hwaddr) {
log.Printf("[DEBUG] found IPs for MAC=%+v: %+v\n", mac, ifaceWithAddr.Addrs)
return true, false, nil
}
}
log.Printf("[DEBUG] %+v doesn't have IP address(es) yet...\n", mac)
return false, false, nil
}
func domainGetState(domain libvirt.Domain) (string, error) {
state, _, err := domain.GetState()
if err != nil {
return "", err
}
var stateStr string
switch state {
case libvirt.DOMAIN_NOSTATE:
stateStr = "nostate"
case libvirt.DOMAIN_RUNNING:
stateStr = "running"
case libvirt.DOMAIN_BLOCKED:
stateStr = "blocked"
case libvirt.DOMAIN_PAUSED:
stateStr = "paused"
case libvirt.DOMAIN_SHUTDOWN:
stateStr = "shutdown"
case libvirt.DOMAIN_CRASHED:
stateStr = "crashed"
case libvirt.DOMAIN_PMSUSPENDED:
stateStr = "pmsuspended"
case libvirt.DOMAIN_SHUTOFF:
stateStr = "shutoff"
default:
stateStr = fmt.Sprintf("unknown: %v", state)
}
return stateStr, nil
}
func domainIsRunning(domain libvirt.Domain) (bool, error) {
state, _, err := domain.GetState()
if err != nil {
return false, fmt.Errorf("Couldn't get state of domain: %s", err)
}
return state == libvirt.DOMAIN_RUNNING, nil
}
func domainGetIfacesInfo(domain libvirt.Domain) ([]libvirt.DomainInterface, error) {
_, found := os.LookupEnv(skipQemuEnvVar)
if found {
log.Printf("[DEBUG] %s defined in environment: skipping qemu-agent", skipQemuEnvVar)
} else {
// get all the interfaces using the qemu-agent, this includes also
// interfaces that are not attached to networks managed by libvirt
// (eg. bridges, macvtap,...)
log.Print("[DEBUG] fetching networking interfaces using qemu-agent")
interfaces := qemuAgentGetInterfacesInfo(&domain, true)
if len(interfaces) > 0 {
// the agent will always return all the interfaces, both the
// ones managed by libvirt and the ones attached to bridge interfaces
// or macvtap. Hence it has the highest priority
return interfaces, nil
}
}
// get all the interfaces attached to libvirt networks
log.Print("[DEBUG] no interfaces could be obtained with qemu-agent: falling back to the libvirt API")
interfaces, err := domain.ListAllInterfaceAddresses(libvirt.DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE)
if err != nil {
switch err.(type) {
default:
return interfaces, fmt.Errorf("Error retrieving interface addresses: %s", err)
case libvirt.Error:
virErr := err.(libvirt.Error)
if virErr.Code != libvirt.ERR_OPERATION_INVALID || virErr.Domain != libvirt.FROM_QEMU {
return interfaces, fmt.Errorf("Error retrieving interface addresses: %s", err)
}
}
}
log.Printf("[DEBUG] Interfaces info obtained with libvirt API:\n%s\n", spew.Sdump(interfaces))
return interfaces, nil
}
|