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# Spike: Investigate adding routes from apps.ci.centos.org
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The Ingress Operator[1] manages `IngressController` resources which will allow us to achieve[3] this on Openshift 4.
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### Resources
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- [1] https://docs.openshift.com/container-platform/4.4/networking/ingress-operator.html
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- [2] https://rcarrata.com/openshift/ocp4_route_sharding/
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- [3] https://projects.engineering.redhat.com/browse/CPE-764
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### POC
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Performed the following steps to achieve goal:
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```
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-rw-rw-r--. 1 dkirwan dkirwan 1060 Jul 6 18:12 deployment.yaml
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-rw-rw-r--. 1 dkirwan dkirwan 286 Jul 6 17:13 ingresscontroller.yaml
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-rw-rw-r--. 1 dkirwan dkirwan 336 Jul 6 17:53 route.yaml
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-rw-rw-r--. 1 dkirwan dkirwan 273 Jul 6 17:58 service.yaml
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```
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- Created an `IngressController` which creates 2 router replicas and configured to manage Routes which point at `*.apps.ci.centos.org`. It also has a `routeSelector` to match labels `type: sharded`
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```
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routeSelector:
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matchLabels:
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type: sharded
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```
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- Created a Deployment with simple app.
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- Created Service and Route to expose the app externally at `ingress-controller-test.apps.ci.centos.org`.
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- Route has been given a label: `type: sharded`
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- Used `dig` to retrieve the public IP address of the cluster
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```
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dig console-openshift-console.apps.ocp.stg.ci.centos.org
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; <<>> DiG 9.11.18-RedHat-9.11.18-1.fc32 <<>> console-openshift-console.apps.ocp.stg.ci.centos.org
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;; global options: +cmd
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;; Got answer:
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;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21722
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;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
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;; OPT PSEUDOSECTION:
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; EDNS: version: 0, flags:; udp: 4096
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;; QUESTION SECTION:
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;console-openshift-console.apps.ocp.stg.ci.centos.org. IN A
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;; ANSWER SECTION:
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console-openshift-console.apps.ocp.stg.ci.centos.org. 600 IN A 8.43.84.237
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;; Query time: 77 msec
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;; SERVER: 10.38.5.26#53(10.38.5.26)
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;; WHEN: Mon Jul 06 18:43:35 IST 2020
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;; MSG SIZE rcvd: 97
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```
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- Configured my `/etc/hosts` file accordingly:
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```
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cat /etc/hosts
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127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
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::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
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8.43.84.237 ingress-controller-test.apps.ci.centos.org
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```
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- Visited `http://ingress-controller-test.apps.ci.centos.org` and was greeted with the expected content in the deployed app.
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- We should be able to achieve this spike CPE-764 using the Ingress Controller Operator.
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