-
Notifications
You must be signed in to change notification settings - Fork 458
/
aws.go
171 lines (134 loc) · 4.56 KB
/
aws.go
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
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
// Package aws contains the AWS implementation of the [platform.Platform].
package aws
import (
"context"
"fmt"
"io"
"log"
"net/netip"
"strings"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/feature/ec2/imds"
"github.com/cosi-project/runtime/pkg/state"
"github.com/siderolabs/go-procfs/procfs"
"github.com/siderolabs/go-retry/retry"
"github.com/siderolabs/talos/internal/app/machined/pkg/runtime"
"github.com/siderolabs/talos/internal/app/machined/pkg/runtime/v1alpha1/platform/errors"
"github.com/siderolabs/talos/internal/app/machined/pkg/runtime/v1alpha1/platform/internal/netutils"
"github.com/siderolabs/talos/pkg/machinery/constants"
"github.com/siderolabs/talos/pkg/machinery/resources/network"
runtimeres "github.com/siderolabs/talos/pkg/machinery/resources/runtime"
)
// AWS is the concrete type that implements the runtime.Platform interface.
type AWS struct {
metadataClient *imds.Client
}
// NewAWS initializes AWS platform building the IMDS client.
func NewAWS() (*AWS, error) {
a := &AWS{}
cfg, err := config.LoadDefaultConfig(context.TODO())
if err != nil {
return nil, fmt.Errorf("error initializing AWS default config: %w", err)
}
a.metadataClient = imds.NewFromConfig(cfg)
return a, nil
}
// ParseMetadata converts AWS platform metadata into platform network config.
func (a *AWS) ParseMetadata(metadata *MetadataConfig) (*runtime.PlatformNetworkConfig, error) {
networkConfig := &runtime.PlatformNetworkConfig{}
if metadata.Hostname != "" {
hostnameSpec := network.HostnameSpecSpec{
ConfigLayer: network.ConfigPlatform,
}
if err := hostnameSpec.ParseFQDN(metadata.Hostname); err != nil {
return nil, err
}
networkConfig.Hostnames = append(networkConfig.Hostnames, hostnameSpec)
}
publicIPs := []string{}
if metadata.PublicIPv4 != "" {
publicIPs = append(publicIPs, metadata.PublicIPv4)
}
if metadata.PublicIPv6 != "" {
publicIPs = append(publicIPs, metadata.PublicIPv6)
}
for _, ipStr := range publicIPs {
if ip, err := netip.ParseAddr(ipStr); err == nil {
networkConfig.ExternalIPs = append(networkConfig.ExternalIPs, ip)
}
}
networkConfig.Metadata = &runtimeres.PlatformMetadataSpec{
Platform: a.Name(),
Hostname: metadata.Hostname,
Region: metadata.Region,
Zone: metadata.Zone,
InstanceType: metadata.InstanceType,
InstanceID: metadata.InstanceID,
ProviderID: fmt.Sprintf("aws:///%s/%s", metadata.Zone, metadata.InstanceID),
Spot: metadata.InstanceLifeCycle == "spot",
}
return networkConfig, nil
}
// Name implements the runtime.Platform interface.
func (a *AWS) Name() string {
return "aws"
}
// Configuration implements the runtime.Platform interface.
func (a *AWS) Configuration(ctx context.Context, r state.State) ([]byte, error) {
if err := netutils.Wait(ctx, r); err != nil {
return nil, err
}
log.Printf("fetching machine config from AWS")
userdata, err := netutils.RetryFetch(ctx, a.fetchConfiguration)
if err != nil {
return nil, err
}
if strings.TrimSpace(userdata) == "" {
return nil, errors.ErrNoConfigSource
}
return []byte(userdata), nil
}
func (a *AWS) fetchConfiguration(ctx context.Context) (string, error) {
resp, err := a.metadataClient.GetUserData(ctx, &imds.GetUserDataInput{})
if err != nil {
if isNotFoundError(err) {
return "", errors.ErrNoConfigSource
}
return "", retry.ExpectedErrorf("failed to fetch EC2 userdata: %w", err)
}
defer resp.Content.Close() //nolint:errcheck
userdata, err := io.ReadAll(resp.Content)
return string(userdata), err
}
// Mode implements the runtime.Platform interface.
func (a *AWS) Mode() runtime.Mode {
return runtime.ModeCloud
}
// KernelArgs implements the runtime.Platform interface.
func (a *AWS) KernelArgs(string) procfs.Parameters {
return []*procfs.Parameter{
procfs.NewParameter("console").Append("tty1").Append("ttyS0"),
procfs.NewParameter(constants.KernelParamNetIfnames).Append("0"),
}
}
// NetworkConfiguration implements the runtime.Platform interface.
func (a *AWS) NetworkConfiguration(ctx context.Context, _ state.State, ch chan<- *runtime.PlatformNetworkConfig) error {
log.Printf("fetching aws instance config")
metadata, err := a.getMetadata(ctx)
if err != nil {
return err
}
networkConfig, err := a.ParseMetadata(metadata)
if err != nil {
return err
}
select {
case ch <- networkConfig:
case <-ctx.Done():
return ctx.Err()
}
return nil
}