forked from hashicorp/terraform
-
Notifications
You must be signed in to change notification settings - Fork 0
/
resource_docker_image_funcs.go
205 lines (164 loc) · 5.2 KB
/
resource_docker_image_funcs.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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
package docker
import (
"fmt"
"strings"
dc "github.com/fsouza/go-dockerclient"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceDockerImageCreate(d *schema.ResourceData, meta interface{}) error {
client := meta.(*dc.Client)
apiImage, err := findImage(d, client)
if err != nil {
return fmt.Errorf("Unable to read Docker image into resource: %s", err)
}
d.SetId(apiImage.ID + d.Get("name").(string))
d.Set("latest", apiImage.ID)
return nil
}
func resourceDockerImageRead(d *schema.ResourceData, meta interface{}) error {
client := meta.(*dc.Client)
var data Data
if err := fetchLocalImages(&data, client); err != nil {
return fmt.Errorf("Error reading docker image list: %s", err)
}
foundImage := searchLocalImages(data, d.Get("name").(string))
if foundImage != nil {
d.Set("latest", foundImage.ID)
} else {
d.SetId("")
}
return nil
}
func resourceDockerImageUpdate(d *schema.ResourceData, meta interface{}) error {
// We need to re-read in case switching parameters affects
// the value of "latest" or others
client := meta.(*dc.Client)
apiImage, err := findImage(d, client)
if err != nil {
return fmt.Errorf("Unable to read Docker image into resource: %s", err)
}
d.Set("latest", apiImage.ID)
return nil
}
func resourceDockerImageDelete(d *schema.ResourceData, meta interface{}) error {
client := meta.(*dc.Client)
err := removeImage(d, client)
if err != nil {
return fmt.Errorf("Unable to remove Docker image: %s", err)
}
d.SetId("")
return nil
}
func searchLocalImages(data Data, imageName string) *dc.APIImages {
if apiImage, ok := data.DockerImages[imageName]; ok {
return apiImage
}
if apiImage, ok := data.DockerImages[imageName+":latest"]; ok {
imageName = imageName + ":latest"
return apiImage
}
return nil
}
func removeImage(d *schema.ResourceData, client *dc.Client) error {
var data Data
if keepLocally := d.Get("keep_locally").(bool); keepLocally {
return nil
}
if err := fetchLocalImages(&data, client); err != nil {
return err
}
imageName := d.Get("name").(string)
if imageName == "" {
return fmt.Errorf("Empty image name is not allowed")
}
foundImage := searchLocalImages(data, imageName)
if foundImage != nil {
err := client.RemoveImage(foundImage.ID)
if err != nil {
return err
}
}
return nil
}
func fetchLocalImages(data *Data, client *dc.Client) error {
images, err := client.ListImages(dc.ListImagesOptions{All: false})
if err != nil {
return fmt.Errorf("Unable to list Docker images: %s", err)
}
if data.DockerImages == nil {
data.DockerImages = make(map[string]*dc.APIImages)
}
// Docker uses different nomenclatures in different places...sometimes a short
// ID, sometimes long, etc. So we store both in the map so we can always find
// the same image object. We store the tags, too.
for i, image := range images {
data.DockerImages[image.ID[:12]] = &images[i]
data.DockerImages[image.ID] = &images[i]
for _, repotag := range image.RepoTags {
data.DockerImages[repotag] = &images[i]
}
}
return nil
}
func pullImage(data *Data, client *dc.Client, image string) error {
// TODO: Test local registry handling. It should be working
// based on the code that was ported over
pullOpts := parseImageOptions(image)
auth := dc.AuthConfiguration{}
if err := client.PullImage(pullOpts, auth); err != nil {
return fmt.Errorf("Error pulling image %s: %s\n", image, err)
}
return fetchLocalImages(data, client)
}
func parseImageOptions(image string) dc.PullImageOptions {
pullOpts := dc.PullImageOptions{}
splitImageName := strings.Split(image, ":")
switch len(splitImageName) {
// It's in registry:port/username/repo:tag or registry:port/repo:tag format
case 3:
splitPortRepo := strings.Split(splitImageName[1], "/")
pullOpts.Registry = splitImageName[0] + ":" + splitPortRepo[0]
pullOpts.Tag = splitImageName[2]
pullOpts.Repository = pullOpts.Registry + "/" + strings.Join(splitPortRepo[1:], "/")
// It's either registry:port/username/repo, registry:port/repo,
// or repo:tag with default registry
case 2:
splitPortRepo := strings.Split(splitImageName[1], "/")
switch len(splitPortRepo) {
// repo:tag
case 1:
pullOpts.Repository = splitImageName[0]
pullOpts.Tag = splitImageName[1]
// registry:port/username/repo or registry:port/repo
default:
pullOpts.Registry = splitImageName[0] + ":" + splitPortRepo[0]
pullOpts.Repository = pullOpts.Registry + "/" + strings.Join(splitPortRepo[1:], "/")
pullOpts.Tag = "latest"
}
// Plain username/repo or repo
default:
pullOpts.Repository = image
}
return pullOpts
}
func findImage(d *schema.ResourceData, client *dc.Client) (*dc.APIImages, error) {
var data Data
if err := fetchLocalImages(&data, client); err != nil {
return nil, err
}
imageName := d.Get("name").(string)
if imageName == "" {
return nil, fmt.Errorf("Empty image name is not allowed")
}
foundImage := searchLocalImages(data, imageName)
if foundImage == nil {
if err := pullImage(&data, client, imageName); err != nil {
return nil, fmt.Errorf("Unable to pull image %s: %s", imageName, err)
}
}
foundImage = searchLocalImages(data, imageName)
if foundImage != nil {
return foundImage, nil
}
return nil, fmt.Errorf("Unable to find or pull image %s", imageName)
}