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To create a new service, sign in to your LocalOps account and follow these steps.
  1. Navigate to the environment where you want the service to run
  2. Go to “Services” tab
  3. Click on ”+ Add new service” tile
  4. Provide service details like Name, Kind, Source repo & branch name, Dockerfile location and run command.
  5. Give port, number of containers and any other details required there
  6. Provide secrets necessary to run your container
  7. Click “Create service”

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Source repo & branch name:

If you have connected your GitHub org/account, you will be able to pick a repository and its corresponding branch name here. When your devs push to this branch, a new deployment will automatically get triggered.
You can choose to turn off automatic deployments. In this case, you can only trigger deployments from within LocalOps console. This is useful if you are deploying to a customer specific standalone environment, and if you need approvals to deploy new changes.

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Dockerfile location

You can specify the file location within your repository where we can find the Dockerfile. If the Dockerfile is present in a non-root directory, you can specify the name of the directory here. Example values - (empty) or build or worker or app, etc., This is optional. Default is “ - empty string, which means Dockerfile will be expected at the root of your git repo. This is to accommodate the case of mono-repos where you might have more than one component’s codebases in the same git repo.

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Run command

You can specify the run command as well. If your Dockerfile has a CMD directive, then that will get used by default. If you specific a different run command here in the form, it will be used instead of the CMD directive specified in the Dockerfile. This is also done to accomodate the case of mono-repos where you might have more than one component’s codebase in the same git repo. You can have scripts of jobs/crons in the same repo. In these cases, you can use the same Dockerfile but a different CMD to run for your service. This is optional. Default is - CMD that is specified in your Dockerfile.

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How CMD works in Dockerfile

The CMD instruction specifies the default command to run when a container is started from the Docker image. If no command is specified during the container startup (i.e., in the docker run command), this default is used. CMD can be overridden by supplying command-line arguments to docker run. CMD is useful for setting default commands and easily overridden parameters. It is often used in images as a way of defining default run parameters and can be overridden from the command line when the container is run. For example, by default, you might want a python web server to start, but also you could override this to run a node server instead: 
CMD ["python", "-DFOREGROUND"]

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Difference between CMD and ENTRYPOINT

The ENTRYPOINT instruction sets the default executable for the container. Any arguments supplied to the docker run command are appended to the ENTRYPOINT command.
Use ENTRYPOINT when you need your container to always run the same base command, and you want to allow users to append additional commands at the end.
ENTRYPOINT is particularly useful for turning a container into a standalone executable. For example, suppose you are packaging a custom script that requires arguments (e.g., “my_script extra_args”). In that case, you can use ENTRYPOINT to always run the script process (“my_script”) and then allow the image users to specify the “extra_args” on the docker run command line. You can do the following:

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Overriding CMD in LocalOps

You can configure the service with custom run command node start.js to get a node process started instead of starting python server.

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Number of containers

Specify the number of copies of your codebase / containers to run. You can define any number from 1 to 99 to support your traffic.

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CPU and memory requirements for each container

Define the minimum CPU and memory requirements to run each container. Service containers will be scheduled to run on the underlying compute servers as appropriate. You can also define the max CPU and max memory here. When any container crosses this limit, it will be re-booted.
Specifying max CPU and max Memory is a neat trick to catch memory leaks and restart containers

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Other details

You can fill out other service specific details like Port (for internal or web service), Cron schedule (for cron service), and so on.

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How to deploy

Containers of the service won’t start to run until you make a new deployment. Click on “Deploy” button on the top right corner to start a manual deployments. Otherwise, if you push new commits to the configured branch above, a new deployment will get triggered. Learn more at Deploy service guide.
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