Adds support for saving/restoring image layers from archive
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24
DOCS.md
24
DOCS.md
@ -9,6 +9,9 @@ The following parameters are used to configure this plugin:
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* `tag` - repository tag for the image
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* `tag` - repository tag for the image
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* `insecure` - enable insecure communication to this registry
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* `insecure` - enable insecure communication to this registry
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* `storage_driver` - use `aufs`, `devicemapper`, `btrfs` or `overlay` driver
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* `storage_driver` - use `aufs`, `devicemapper`, `btrfs` or `overlay` driver
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* `archive` - save and restore image layers to/from a tarred archive
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* `file` - absolute or relative path to archive file
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* `tag` - limit archiving to these tag(s) (optional)
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The following is a sample Docker configuration in your .drone.yml file:
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The following is a sample Docker configuration in your .drone.yml file:
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@ -53,6 +56,27 @@ publish:
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Note that in the above example we quote the version numbers. If the yaml parser interprets the value as a number it will cause a parsing error.
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Note that in the above example we quote the version numbers. If the yaml parser interprets the value as a number it will cause a parsing error.
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You may want to cache Docker image layers between builds to speed up the build process:
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```
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publish:
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docker:
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username: kevinbacon
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password: $$DOCKER_PASSWORD
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email: kevin.bacon@mail.com
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repo: foo/bar
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tag:
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- latest
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- "1.0.1"
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archive:
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file: docker/image.tar
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tag: latest
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cache:
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mount:
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- docker/image.tar
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```
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## Troubleshooting
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## Troubleshooting
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For detailed output you can set the `DOCKER_LAUNCH_DEBUG` environment variable in your plugin configuration. This starts Docker with verbose logging enabled.
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For detailed output you can set the `DOCKER_LAUNCH_DEBUG` environment variable in your plugin configuration. This starts Docker with verbose logging enabled.
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57
main.go
57
main.go
@ -5,12 +5,18 @@ import (
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"io/ioutil"
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"io/ioutil"
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"os"
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"os"
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"os/exec"
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"os/exec"
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"path/filepath"
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"strings"
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"strings"
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"time"
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"time"
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"github.com/drone/drone-plugin-go/plugin"
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"github.com/drone/drone-plugin-go/plugin"
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)
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)
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type Archive struct {
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File string `json:"file"`
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Tag StrSlice `json:"tag"`
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}
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type Docker struct {
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type Docker struct {
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Storage string `json:"storage_driver"`
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Storage string `json:"storage_driver"`
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Registry string `json:"registry"`
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Registry string `json:"registry"`
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@ -24,6 +30,7 @@ type Docker struct {
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File string `json:"file"`
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File string `json:"file"`
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Context string `json:"context"`
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Context string `json:"context"`
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Dns []string `json:"dns"`
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Dns []string `json:"dns"`
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Archive Archive `json:"archive"`
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}
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}
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func main() {
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func main() {
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@ -59,6 +66,12 @@ func main() {
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if vargs.Tag.Len() == 0 {
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if vargs.Tag.Len() == 0 {
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vargs.Tag = StrSlice{[]string{"latest"}}
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vargs.Tag = StrSlice{[]string{"latest"}}
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}
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}
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// Archive file can be both a relative or absolute path
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if len(vargs.Archive.File) != 0 {
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if ! filepath.IsAbs(vargs.Archive.File) {
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vargs.Archive.File = filepath.Join(workspace.Path, vargs.Archive.File)
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}
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}
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go func() {
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go func() {
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args := []string{"-d"}
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args := []string{"-d"}
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@ -125,6 +138,23 @@ func main() {
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trace(cmd)
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trace(cmd)
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cmd.Run()
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cmd.Run()
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// Load archived image if exists
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if len(vargs.Archive.File) != 0 {
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if _, err := os.Stat(vargs.Archive.File); err != nil {
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fmt.Printf("Archive %s does not exist. Building from scratch.\n", vargs.Archive.File)
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} else {
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cmd := exec.Command("/usr/bin/docker", "load", "-i", vargs.Archive.File)
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cmd.Dir = workspace.Path
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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trace(cmd)
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err := cmd.Run()
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if err != nil {
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os.Exit(1)
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}
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}
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}
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// Build the container
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// Build the container
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name := fmt.Sprintf("%s:%s", vargs.Repo, vargs.Tag.Slice()[0])
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name := fmt.Sprintf("%s:%s", vargs.Repo, vargs.Tag.Slice()[0])
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cmd = exec.Command("/usr/bin/docker", "build", "--pull=true", "--rm=true", "-f", vargs.File, "-t", name, vargs.Context)
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cmd = exec.Command("/usr/bin/docker", "build", "--pull=true", "--rm=true", "-f", vargs.File, "-t", name, vargs.Context)
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@ -165,6 +195,33 @@ func main() {
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}
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}
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}
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}
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// Save the image to the archive
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if len(vargs.Archive.File) != 0 {
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// if the path's directory does not exist, create it
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dir := filepath.Dir(vargs.Archive.File)
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os.MkdirAll(dir, 0755)
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cmd = exec.Command("/usr/bin/docker", "save", "-o", vargs.Archive.File)
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// Limit save command to the given tag(s)
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if vargs.Archive.Tag.Len() != 0 {
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for _, tag := range vargs.Archive.Tag.Slice() {
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name_ := fmt.Sprintf("%s:%s", vargs.Repo, tag)
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cmd.Args = append(cmd.Args, name_)
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}
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} else {
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cmd.Args = append(cmd.Args, vargs.Repo)
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}
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cmd.Dir = workspace.Path
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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trace(cmd)
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err := cmd.Run()
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if err != nil {
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os.Exit(1)
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}
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}
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}
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}
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// Trace writes each command to standard error (preceded by a ‘$ ’) before it
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// Trace writes each command to standard error (preceded by a ‘$ ’) before it
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