diff --git a/docker.go b/docker.go new file mode 100644 index 0000000..d0342af --- /dev/null +++ b/docker.go @@ -0,0 +1,166 @@ +package main + +import ( + "context" + "fmt" + "strings" + "errors" + + "github.com/docker/docker/api/types" + "github.com/docker/docker/api/types/container" + "github.com/docker/docker/api/types/network" + "github.com/docker/docker/client" +) + +type LabeledContainer struct { + Container types.Container + Mode VersioningMode +} + +// Extract the repository owner (if any), repository and tag (if any) from a docker image name +func (lc LabeledContainer) SplitImageParts() (*string, string, *string) { + name := lc.Container.Image + + var repository string + var owner *string + var tag *string + + slashIndex := strings.Index(name, "/") + if slashIndex >= 0 { + tmp := name[:slashIndex] + owner = &tmp + name = name[slashIndex+1:] + } + + colonIndex := strings.Index(name, ":") + if colonIndex >= 0 { + tmp := name[colonIndex+1:] + tag = &tmp + + repository = name[:colonIndex] + } else { + repository = name + } + + return owner, repository, tag +} + +func combineImageParts(owner *string, repository string, tag *string) string { + image := repository + if owner != nil { + image = fmt.Sprintf("%s/%s", *owner, image) + } + if tag != nil { + image = fmt.Sprintf("%s:%s", image, *tag) + } + + return image +} + +func getLabeledContainers(cli *client.Client) []LabeledContainer { + out := make([]LabeledContainer, 0) + + containers, err := cli.ContainerList(context.Background(), types.ContainerListOptions{}) + if err != nil { + panic(err) + } + + fmt.Println("scanning running container labels") + for _, container := range containers { + fmt.Printf("- %s %s\n", container.ID[:10], container.Image) + for k, v := range container.Labels { + fmt.Printf(" - \"%s\": \"%s\"\n", k, v) + if k == versioningModeLabel { + mode := ParseVersioningMode(v) + if mode == nil { + fmt.Printf("Failed to parse '%s' as a versioning mode\n", v) + continue + } + + lc := LabeledContainer{ + container, + *mode, + } + + out = append(out, lc) + continue + } + } + } + + return out +} + +func (lc LabeledContainer) UpdateTo(cli *client.Client, tag Tag) error { + ctx := context.Background() + + owner, repository, _ := lc.SplitImageParts() + image := combineImageParts(owner, repository, &tag.Name) + canonicalImage := fmt.Sprintf("docker.io/%s", image) + fmt.Printf("Pulling image \"%s\"\n", canonicalImage) + + //containers, err := cli.ContainerList(context.Background(), types.ContainerListOptions{}) + rc, err := cli.ImagePull(ctx, canonicalImage, types.ImagePullOptions{}) + if err != nil { + return err + } + + // TODO: does it still pull the image if i just close the reader? + err = rc.Close() + if err != nil { + return err + } + + if len(lc.Container.Names) != 1 { + return errors.New("containers with more (or fewer) than 1 name are not supported") + } + name := lc.Container.Names[0] + tmpOldName := fmt.Sprintf("%s.lb.old", name) + + fmt.Printf("Stopping container %s\n", lc.Container.ID) + // TODO: hopefully this is blocking + err = cli.ContainerStop(ctx, lc.Container.ID, nil) + if err != nil { + return err + } + + fmt.Printf("Renaming container %s\n", lc.Container.ID) + err = cli.ContainerRename(ctx, lc.Container.ID, tmpOldName) + if err != nil { + return err + } + + fmt.Printf("Creating new container\n") + body, err := cli.ContainerCreate(ctx, &container.Config{ + Image: image, + //Cmd: []string{"echo", "hello world"}, + Labels: lc.Container.Labels, + Tty: false, + }, &container.HostConfig{ + VolumesFrom: []string{tmpOldName}, + }, &network.NetworkingConfig{ + EndpointsConfig: lc.Container.NetworkSettings.Networks, + }, name) + + if err != nil { + return err + } + + fmt.Printf("Starting new container id: %s\n", body.ID) + err = cli.ContainerStart(ctx, body.ID, types.ContainerStartOptions{}) + if err != nil { + return err + } + + fmt.Printf("Removing old container\n") + err = cli.ContainerRemove(ctx, tmpOldName, types.ContainerRemoveOptions{ + RemoveVolumes: false, + RemoveLinks: false, + Force: false, + }) + if err != nil { + return err + } + + return nil +} diff --git a/go.mod b/go.mod index 37f8179..de0b11e 100644 --- a/go.mod +++ b/go.mod @@ -5,11 +5,15 @@ go 1.15 require ( github.com/Microsoft/go-winio v0.4.14 // indirect github.com/coreos/go-semver v0.3.0 - github.com/docker/distribution v2.7.1+incompatible // indirect + github.com/docker/distribution v2.7.1+incompatible github.com/docker/docker v1.13.1 github.com/docker/go-connections v0.4.0 // indirect github.com/docker/go-units v0.4.0 // indirect - github.com/opencontainers/go-digest v1.0.0 // indirect + github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 + github.com/heroku/docker-registry-client v0.0.0-20190909225348-afc9e1acc3d5 + github.com/opencontainers/go-digest v1.0.0 + github.com/opencontainers/image-spec v1.0.1 // indirect github.com/pkg/errors v0.9.1 // indirect + github.com/sirupsen/logrus v1.4.2 golang.org/x/net v0.0.0-20201031054903-ff519b6c9102 // indirect ) diff --git a/go.sum b/go.sum index 9750841..3971ca2 100644 --- a/go.sum +++ b/go.sum @@ -1,9 +1,14 @@ +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= github.com/Microsoft/go-winio v0.4.14 h1:+hMXMk01us9KgxGb7ftKQt2Xpf5hH/yky+TDA+qxleU= github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA= +github.com/OpenPeeDeeP/depguard v1.0.0/go.mod h1:7/4sitnI9YlQgTLLk734QlzXT8DuHVnAyztLplQjk+o= +github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg= github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM= github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/docker/distribution v0.0.0-20171011171712-7484e51bf6af/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w= github.com/docker/distribution v2.7.1+incompatible h1:a5mlkVzth6W5A4fOsS3D2EO5BUmsJpcB+cRlLU7cSug= github.com/docker/distribution v2.7.1+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w= github.com/docker/docker v1.13.1 h1:IkZjBSIc8hBjLpqeAbeE5mca5mNgeatLHBy3GO78BWo= @@ -12,29 +17,166 @@ github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKoh github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec= github.com/docker/go-units v0.4.0 h1:3uh0PgVws3nIA0Q+MwDC8yjEPf9zjRfZZWXZYDct3Tw= github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk= +github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 h1:UhxFibDNY/bfvqU5CAUmr9zpesgbU6SWc8/B4mflAE4= 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v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0= diff --git a/main.go b/main.go index a479e71..9f63bb6 100644 --- a/main.go +++ b/main.go @@ -1,157 +1,32 @@ package main import ( - "context" - "encoding/json" - "net/http" "fmt" - "strings" - "github.com/docker/docker/api/types" + //"github.com/sirupsen/logrus" TODO "github.com/docker/docker/client" ) -type labeledContainer struct { - container types.Container - mode VersioningMode -} - -type Tag struct { - Creator int `json:"creator"` - ID int `json:"id"` - LastUpdated string `json:"last_updated"` - LastUpdater int `json:"lastUpdater"` - LastUpdaterUsername string `json:"lastUpdaterUsername"` - Name string `json:"name"` - Repository int `json:"repository"` - FullSize int `json:"full_size"` - V2 bool `json:"v2"` - TagStatus string `json:"tag_status"` - TagLastPulled string `json:"tag_last_pulled"` - TagLastPushed string `json:"tag_last_pushed"` - Images []Image `json:images` -} - -type Image struct { - Architecture string `json:architecture` - Features string `json:features` - Digest string `json:digest` - OS string `json:linux` - OSFeatures string `json:os_features` - Size int `json:size` - Status string `json:status` - LastPulled string `json:last_pulled` - LastPushed string `json:last_pushed` - //"variant":null, - //"os_version":null, -} - -// Extract the repository owner (if any), repository and tag (if any) from a docker image name -func getImageParts(name string) (*string, string, *string) { - var repository string - var owner *string - var tag *string - - slashIndex := strings.Index(name, "/") - if slashIndex >= 0 { - tmp := name[:slashIndex] - owner = &tmp - name = name[slashIndex+1:] - } - - colonIndex := strings.Index(name, ":") - if colonIndex >= 0 { - tmp := name[colonIndex+1:] - tag = &tmp - - repository = name[:colonIndex] - } else { - repository = name - } - - return owner, repository, tag -} - -func getDockerRepoTags(maybe_owner *string, repository string) []Tag { - type dockerPollResponse struct { - Count int `json:"count"` - Results []Tag `json:"results"` - } - - owner := "_" - if maybe_owner != nil { - owner = *maybe_owner - } - - url := fmt.Sprintf("https://hub.docker.com/v2/repositories/%s/%s/tags", owner, repository) - resp, err := http.Get(url) - if err != nil { - panic(err) - } - - var data dockerPollResponse - err = json.NewDecoder(resp.Body).Decode(&data) - if err != nil { - panic(err) - } - - return data.Results -} - -func getLabeledContainers(cli *client.Client) []labeledContainer { - out := make([]labeledContainer, 0) - - containers, err := cli.ContainerList(context.Background(), types.ContainerListOptions{}) - if err != nil { - panic(err) - } - - fmt.Println("scanning running container labels") - for _, container := range containers { - fmt.Printf("- %s %s\n", container.ID[:10], container.Image) - for k, v := range container.Labels { - fmt.Printf(" - \"%s\": \"%s\"\n", k, v) - if k == versioningModeLabel { - mode := ParseVersioningMode(v) - if mode == nil { - fmt.Printf("Failed to parse '%s' as a versioning mode\n", v) - continue - } - - lc := labeledContainer{ - container, - *mode, - } - - out = append(out, lc) - continue - } - } - } - - return out -} - func main() { cli, err := client.NewEnvClient() if err != nil { panic(err) } + hub, err := anonymousClient() + if err != nil { + panic(err) + } + labeledContainers := getLabeledContainers(cli) fmt.Println() for _, lc := range labeledContainers { - owner, repository, tag := getImageParts(lc.container.Image) + owner, repository, tag := lc.SplitImageParts() - if owner != nil { - fmt.Printf("container image: %s/%s\n", *owner, repository) - } else { - fmt.Printf("container image: _/%s\n", repository) - } - fmt.Printf(" versioning: %+v\n", lc.mode.Label()) - - fmt.Printf(" id: %s\n", lc.container.ImageID) + fmt.Printf("container image: %s\n", combineImageParts(owner, repository, nil)) + fmt.Printf(" versioning: %+v\n", lc.Mode.Label()) + fmt.Printf(" id: %s\n", lc.Container.ImageID) if tag != nil { fmt.Printf(" current tag: %s\n", *tag) @@ -160,15 +35,27 @@ func main() { continue } - repoTags := getDockerRepoTags(owner, repository) + repoTags, err := getDockerRepoTags(hub, owner, repository) + if err != nil { + panic(err) + } fmt.Println(" tags in registry:") for _, tag := range repoTags { - fmt.Printf(" - \"%s\"\n", tag.Name) + fmt.Printf(" - \"%s\" %s\n", tag.Name, tag.Digest) svt := parseTagAsSemVer(tag.Name) if svt != nil { fmt.Printf(" semver: true\n") } } + + shouldUpdateTo := lc.Mode.ShouldUpdate(*tag, repoTags) + if shouldUpdateTo != nil { + fmt.Printf(" updating to: %s\n", shouldUpdateTo.Name) + err = lc.UpdateTo(cli, *shouldUpdateTo) + if err != nil { + panic(err) + } + } } } diff --git a/registry.go b/registry.go new file mode 100644 index 0000000..becb6d2 --- /dev/null +++ b/registry.go @@ -0,0 +1,50 @@ +package main + +import ( + "fmt" + "github.com/heroku/docker-registry-client/registry" + d "github.com/opencontainers/go-digest" + //"github.com/docker/distribution/digest" + //"github.com/docker/distribution/manifest" + //"github.com/docker/libtrust" +) + +type Tag struct { + Name string + SemVer *SemVerTag + Digest d.Digest +} + +func anonymousClient() (*registry.Registry, error) { + url := "https://registry-1.docker.io/" + username := "" // anonymous + password := "" // anonymous + + return registry.New(url, username, password) +} + +func getDockerRepoTags(hub *registry.Registry, maybe_owner *string, repository string) ([]Tag, error) { + if maybe_owner != nil { + repository = fmt.Sprintf("%s/%s", *maybe_owner, repository) + } + + tags, err := hub.Tags(repository) + if err != nil { + return nil, err + } + + out := []Tag{} + + for _, tag := range tags { + digest, err := hub.ManifestDigest(repository, tag) + if err != nil { + return nil, err + } + + svt := parseTagAsSemVer(tag) + + out = append(out, Tag { tag, svt, digest }) + } + + return out, nil +} diff --git a/versioning_mode.go b/versioning_mode.go index b6a033f..f03f214 100644 --- a/versioning_mode.go +++ b/versioning_mode.go @@ -1,5 +1,9 @@ package main +import ( + "sort" +) + const ( versioningModeLabel = "lookbuilding.mode" ) @@ -30,7 +34,30 @@ func (SameTag) ShouldUpdate(currentTag string, availableTags []Tag) *Tag { func (SemVerMajor) Label() string { return "semver_major" } func (SemVerMajor) ShouldUpdate(currentTag string, availableTags []Tag) *Tag { - return nil // TODO: implement me + currentSemVer := parseTagAsSemVer(currentTag) + if currentSemVer == nil { + return nil + } + + semverTags := make([]Tag, 0) + + for _, tag := range availableTags { + if tag.SemVer != nil { + semverTags = append(semverTags, tag); + } + } + + if len(semverTags) == 0 { + return nil + } + + sort.Slice(semverTags, func(i, j int) bool { + a := semverTags[i].SemVer.version + b := semverTags[j].SemVer.version + return b.LessThan(a) + }) + + return &semverTags[0] } func (SemVerMinor) Label() string { return "semver_minor" }