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Marty Hernandez Avedon
28acde1f41
* canonicized horizontal-pod-autoscaler * canonicized load-balancer-and-ingress-controller * canonicized workloads-and-pods * canonicized kubernetes-resource-setup
54 lines
2.4 KiB
Markdown
54 lines
2.4 KiB
Markdown
---
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title: Service Discovery
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---
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<head>
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<link rel="canonical" href="https://ranchermanager.docs.rancher.com/how-to-guides/new-user-guides/kubernetes-resources-setup/create-services"/>
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</head>
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For every workload created, a complementing Service Discovery entry is created. This Service Discovery entry enables DNS resolution for the workload's pods using the following naming convention:
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`<workload>.<namespace>.svc.cluster.local`.
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However, you also have the option of creating additional Service Discovery records. You can use these additional records so that a given namespace resolves with one or more external IP addresses, an external hostname, an alias to another DNS record, other workloads, or a set of pods that match a selector that you create.
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1. From the **Global** view, open the project that you want to add a DNS record to.
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1. Click **Resources** in the main navigation bar. Click the **Service Discovery** tab. Then click **Add Record**.
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1. Enter a **Name** for the DNS record. This name is used for DNS resolution.
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1. Select a **Namespace** from the drop-down list. Alternatively, you can create a new namespace on the fly by clicking **Add to a new namespace**.
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1. Select one of the **Resolves To** options to route requests to the DNS record.
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1. **One or more external IP addresses**
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Enter an IP address in the **Target IP Addresses** field. Add more IP addresses by clicking **Add Target IP**.
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1. **An external hostname**
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Enter a **Target Hostname**.
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1. **Alias of another DNS record's value**
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Click **Add Target Record** and select another DNS record from the **Value** drop-down.
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1. **One or more workloads**
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Click **Add Target Workload** and select another workload from the **Value** drop-down.
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1. **The set of pods which match a selector**
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Enter key value pairs of [label selectors](https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors) to create a record for all pods that match your parameters.
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1. Click **Create**
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**Result:** A new DNS record is created.
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- You can view the record by from the project's **Service Discovery** tab.
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- When you visit the new DNS name for the new record that you created (`<recordname>.<namespace>.svc.cluster.local`), it resolves the chosen namespace.
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## Related Links
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- [Adding entries to Pod /etc/hosts with HostAliases](https://kubernetes.io/docs/concepts/services-networking/add-entries-to-pod-etc-hosts-with-host-aliases/)
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