![]() This header allows the docker engine to quickly resolve authentication realmsĪnd fallback to version 1 registries, if necessary. Header should be set to the value “registry/2.0”, even for a 4xx response. Request under the “/v2/” url space, the Docker-Distribution-API-Version Getting the headers correct is very important. More requests are directed to the backend. Of writing), but is not optimal if the instances are not shared, because Configuring different redis instances works (at the time The HTTP Secret coordinates uploads, so also must be the same across For other drivers, such as S3 or Azure, they should beĪccessing the same resource and share an identical configuration. Must have access to the same filesystem root, on For the current version of the registry, this meansĭifferences in any of the above cause problems serving requests.Īs an example, if you’re using the filesystem driver, all registry instances The most important aspect is that a load balanced cluster of registries must Scope of this document, there are a few considerations that can make the process While a full load balancing setup is outside the One may want to use a load balancer to distribute load, terminate TLS or Requests to the node which is running the service. ![]() You can access the service on port 443 of any swarm node. $ docker service create \ -name registry \ -secret domain.crt \ -secret domain.key \ -constraint '=true' \ -mount type = bind,src =/mnt/registry,dst =/var/lib/registry \ -e REGISTRY_HTTP_ADDR =0.0.0.0:443 \ -e REGISTRY_HTTP_TLS_CERTIFICATE =/run/secrets/domain.crt \ -e REGISTRY_HTTP_TLS_KEY =/run/secrets/domain.key \ -publish published =443,target =443 \ -replicas 1 \ TLS certificates as in the previous examples.įirst, save the TLS certificate and key as secrets: The following example starts a registry as a single-replica service, which isĪccessible on any swarm node on port 80. Node constraint to ensure that only a single worker is writing to the bind You can solve this problem by using a single-replica service and a Own storage location, which means that each registry contains a differentĭata set. ![]() If you use a local bind mount or volume, each worker node writes to its Each worker can write to the storage back-end If you use a distributed storage driver, such as Amazon S3, you can use aįully replicated service. Or a service with either only a single node or a node constraint. The storage back-end you use determines whether you use a fully scaled service Store sensitive data such as TLS certificates in Provide automatic load balancing scaling, and the ability to control theĭistribution of your service, among other advantages. The desired state and Docker works to keep your service in that state. They use a declarative model, which means that you define Swarm services provide several advantages over Unless you have set up verification for your self-signedĬertificate, this is for testing only. It is possible to use a self-signed certificate, or to use our registry For more information on Let’s Encrypt, see The registry supports using Let’s Encrypt to automatically obtain aīrowser-trusted certificate. You can use the certificate bundle just as you use the domain.crt file in If you have been issued an intermediate certificate instead, seeĬat domain.crt intermediate-certificates.pem > certs/domain.crt You have already obtained a certificate from a certificate authority (CA).Your DNS, routing, and firewall settings allow access to the registry’s host.This example is extended in Run the registry as a ![]() Order to make your registry accessible to external hosts, you must first secure Running a registry only accessible on localhost has limited usefulness. You can store the registry data in an Amazon S3īucket, Google Cloud Platform, or on another storage back-end by using $ docker run -d \ -p 5000:5000 \ -restart =always \ -name registry \ -v /mnt/registry:/var/lib/registry \īy default, the registry stores its data on the local filesystem, whether you
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