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Ensure service images get default tag and print familiar strings

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Signed-off-by: Nishant Totla <nishanttotla@gmail.com>
This commit is contained in:
Nishant Totla 2017-05-18 15:00:25 -07:00
parent b0dd3dfc11
commit 5efcec7717
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GPG key ID: 7EA5781C9B3D0C19
2 changed files with 29 additions and 10 deletions
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31
client/service_create.go
View file

@ -24,14 +24,18 @@ func (cli *Client) ServiceCreate(ctx context.Context, service swarm.ServiceSpec,
headers["X-Registry-Auth"] = []string{options.EncodedRegistryAuth}
}
// ensure that the image is tagged
if taggedImg := imageWithTagString(service.TaskTemplate.ContainerSpec.Image); taggedImg != "" {
service.TaskTemplate.ContainerSpec.Image = taggedImg
}
// Contact the registry to retrieve digest and platform information
if options.QueryRegistry {
distributionInspect, err := cli.DistributionInspect(ctx, service.TaskTemplate.ContainerSpec.Image, options.EncodedRegistryAuth)
distErr = err
if err == nil {
// now pin by digest if the image doesn't already contain a digest
img := imageWithDigestString(service.TaskTemplate.ContainerSpec.Image, distributionInspect.Descriptor.Digest)
if img != "" {
if img := imageWithDigestString(service.TaskTemplate.ContainerSpec.Image, distributionInspect.Descriptor.Digest); img != "" {
service.TaskTemplate.ContainerSpec.Image = img
}
// add platforms that are compatible with the service
@ -55,22 +59,33 @@ func (cli *Client) ServiceCreate(ctx context.Context, service swarm.ServiceSpec,
}
// imageWithDigestString takes an image string and a digest, and updates
// the image string if it didn't originally contain a digest. It assumes
// that the image string is not an image ID
// the image string if it didn't originally contain a digest. It returns
// an empty string if there are no updates.
func imageWithDigestString(image string, dgst digest.Digest) string {
ref, err := reference.ParseAnyReference(image)
namedRef, err := reference.ParseNormalizedNamed(image)
if err == nil {
if _, isCanonical := ref.(reference.Canonical); !isCanonical {
namedRef, _ := ref.(reference.Named)
if _, isCanonical := namedRef.(reference.Canonical); !isCanonical {
// ensure that image gets a default tag if none is provided
img, err := reference.WithDigest(namedRef, dgst)
if err == nil {
return img.String()
return reference.FamiliarString(img)
}
}
}
return ""
}
// imageWithTagString takes an image string, and returns a tagged image
// string, adding a 'latest' tag if one was not provided. It returns an
// emptry string if a canonical reference was provided
func imageWithTagString(image string) string {
namedRef, err := reference.ParseNormalizedNamed(image)
if err == nil {
return reference.FamiliarString(reference.TagNameOnly(namedRef))
}
return ""
}
// updateServicePlatforms updates the Platforms in swarm.Placement to list
// all compatible platforms for the service, as found in distributionInspect
// and returns a pointer to the new or updated swarm.Placement struct

8
client/service_update.go
View file

@ -35,6 +35,11 @@ func (cli *Client) ServiceUpdate(ctx context.Context, serviceID string, version
query.Set("version", strconv.FormatUint(version.Index, 10))
// ensure that the image is tagged
if taggedImg := imageWithTagString(service.TaskTemplate.ContainerSpec.Image); taggedImg != "" {
service.TaskTemplate.ContainerSpec.Image = taggedImg
}
// Contact the registry to retrieve digest and platform information
// This happens only when the image has changed
if options.QueryRegistry {
@ -42,8 +47,7 @@ func (cli *Client) ServiceUpdate(ctx context.Context, serviceID string, version
distErr = err
if err == nil {
// now pin by digest if the image doesn't already contain a digest
img := imageWithDigestString(service.TaskTemplate.ContainerSpec.Image, distributionInspect.Descriptor.Digest)
if img != "" {
if img := imageWithDigestString(service.TaskTemplate.ContainerSpec.Image, distributionInspect.Descriptor.Digest); img != "" {
service.TaskTemplate.ContainerSpec.Image = img
}
// add platforms that are compatible with the service