由羅伯特貝利給出的答案是有利於某些任務，但可能會錯過你特別想做的事情。儘管如此，您對答覆的評論並不是他的回答的錯誤，而是您自己對「失敗」的命令實際上意味着什麼的理解。
至於你的第二個評論，
Using docker I get the following error (for the reasons mentioned above; I also edited the question): Cannot connect to the Docker daemon. Is the docker daemon running on this host?
這是碼頭工人守護程序沒有運行的結果。檢查它是否通過ps aux | grep docker運行。您可以參考Docker documentation以確定如何正確安裝並運行它。
至於你的第一個評論，
Using curl I get: {"errors":[{"code":"DENIED","message":"Failed to read tags for repository '<my_project>/<my_image>'"}]} . I have to authenticate somehow to access the images in a private registry. I don't want to use docker because that means I have to have a docker daemon available. I only want to see if a container image with a particular version is in the Container Registry. So what I need is an API to the Container Registry in the Google Developer Console.
你不會是能夠curl圖像，除非它是公開的，在羅伯特的最新評論中提及，或者除非你以某種方式中提供了一些偉大的OAuth頭curl的調用。
您應該使用gcloud docker嘗試列出註冊表中的圖像，就像您對其他碼頭註冊表一樣。 gcloud container命令組對於您所需的任務而言是錯誤的。你可以看到下面的輸出從gcloud version 96.0.0（最新作此評論的）爲docker命令組：
$ gcloud docker
Usage: docker [OPTIONS] COMMAND [arg...]
docker daemon [ --help | ... ]
docker [ --help | -v | --version ]
A self-sufficient runtime for containers.
Options:
--config=~/.docker Location of client config files
-D, --debug=false Enable debug mode
--disable-legacy-registry=false Do not contact legacy registries
-H, --host=[] Daemon socket(s) to connect to
-h, --help=false Print usage
-l, --log-level=info Set the logging level
--tls=false Use TLS; implied by --tlsverify
--tlscacert=~/.docker/ca.pem Trust certs signed only by this CA
--tlscert=~/.docker/cert.pem Path to TLS certificate file
--tlskey=~/.docker/key.pem Path to TLS key file
--tlsverify=false Use TLS and verify the remote
-v, --version=false Print version information and quit
Commands:
attach Attach to a running container
build Build an image from a Dockerfile
commit Create a new image from a container's changes
cp Copy files/folders between a container and the local filesystem
create Create a new container
diff Inspect changes on a container's filesystem
events Get real time events from the server
exec Run a command in a running container
export Export a container's filesystem as a tar archive
history Show the history of an image
images List images
import Import the contents from a tarball to create a filesystem image
info Display system-wide information
inspect Return low-level information on a container or image
kill Kill a running container
load Load an image from a tar archive or STDIN
login Register or log in to a Docker registry
logout Log out from a Docker registry
logs Fetch the logs of a container
network Manage Docker networks
pause Pause all processes within a container
port List port mappings or a specific mapping for the CONTAINER
ps List containers
pull Pull an image or a repository from a registry
push Push an image or a repository to a registry
rename Rename a container
restart Restart a container
rm Remove one or more containers
rmi Remove one or more images
run Run a command in a new container
save Save an image(s) to a tar archive
search Search the Docker Hub for images
start Start one or more stopped containers
stats Display a live stream of container(s) resource usage statistics
stop Stop a running container
tag Tag an image into a repository
top Display the running processes of a container
unpause Unpause all processes within a container
version Show the Docker version information
volume Manage Docker volumes
wait Block until a container stops, then print its exit code
Run 'docker COMMAND --help' for more information on a command.
您應該使用gcloud docker search gcr.io/project-id檢查哪些圖像是在庫中。 gcloud擁有您的憑證，所以只要您在項目中通過了身份驗證，就可以與私人註冊表通話。
最後，作爲一個額外的資源：雲平臺的文檔有關於與Google Container Registry工作整篇文章。
太棒了！謝謝！！ –
我可以得到第一個工作，但list-tags命令總是給我錯誤：（gcloud.alpha.container.images.list-tags）太少的參數： – gregw
啊列表標籤使用'gcloud alpha容器圖像list-tags gcr.io/$ project/$ image' – gregw