Create A Global Service For Redis Image

Brie

14 Apr, 2019

The next step will deploy a web app on a different node that will interact with redis over the network. The name of the service will be redis that can be used for discovery via dns.

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create a global service for redis image

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Create a global service for redis image. With this information the nodes are able to log into the registry and pull the image. To complete this step launch a container in the background running an instance of redis based on the official image. To show this in action lets go ahead and recreate our redis service as a global service.

A global service in docker swarm mode is used to create a service that has a task running on every node worker automatically. This is useful for common services such as redis that may be leveraged internally by other services. If a service has more than one plan then the number of service instances for all plans combined cannot exceed the global quota for the service.

Because redis is a database jane wants to run it as a background service while she continues to work. Detach the shell into a new window. A global service in docker swarm mode is used to create a service that has a task running on every node worker automatically.

Docker service create name redis network app1 network redisalpine. If you need more than one terminal prompts. Docker service create name redis2 mode global redis306 specify service constraints constraint you can limit the set of nodes where a task can be scheduled by defining constraint expressions.

Docker at swarm1 service create name redis mode global constraintnodelabelstypeweb redis docker at swarm1 docker service ps redis id name image node desired state current state error 4vvfrhut88y6kkqyazjyuntz0 redis redis swarm1 running allocated 6 seconds ago bvojf85sqtu42yfdlc5adf59q redis redis swarm2 running preparing 6. Create a service with 5 replica tasks replicas use the replicas flag to set the number of replica tasks for a replicated service. The following will deploy a redis service using the network.

The following command creates a redis service with 5 replica tasks. A global quota at the service level sets the maximum number of service instances that can be created by a given service broker. Each pcf service has a separate service broker.

Using the search command jane has identified that the redis docker image is called redis and wants to run the latest release. This is useful for common services such as redis that may be leveraged. Redis is an open source key value store that functions as a data structure server.

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