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How to run the 3Scale APICast Gateway in OpenShift ?

In my last blogpost I’ve shown how to run the 3Scale APICast Gateway in a Docker container. The next step would be to run APICast in OpenShift (both are Red Hat family members) and this was part of a showcase for a client. This blogpost will show you which steps to make.

High Level Overview

So this is how our setup looks like with very bright shiny pretty colours:

The preperation

What we need:

  • Endpoint for the API to hit, like apicast.rubix.local
  • Endpoint of the 3Scale SaaS environment (like jvzoggel-admin.3scale.net)
  • 3Scale SaaS Access Token which is something like 93b21fc40335f58ee3a93d5a5c343…..
  • user key which is shown at the bottom of the SaaS API Configuration screen in the curl example or can be found in Application -> your app

First make sure the API Endpoint is set in the 3Scale SaaS environment and copy the the curl example at the bottom for your own convenience.

API endpoint to hit

You probably already have an Access Token, if not you can generate one from Personal Settings -> Tokens -> Access Tokens

Make sure to always note down access tokens since your not able to retrieve it again.

The commands

We make sure OpenShift is running (I use my local OS X machine to run so adjust commands where needed when a remote OpenShift cluster is needed)

jvzoggel$ oc cluster up --docker-machine=openshift
Starting OpenShift using openshift/origin:v3.7.0 ...
OpenShift server started.

The server is accessible via web console at:
    https://192.168.99.100:8443

You are logged in as:
    User:     developer
    Password: <any value>

To login as administrator:
    oc login -u system:admin

Note the OpenShift URL (in this case 192.168.99.100) presented here, we will need this later.

Next step we will use the OC command to create a new project,

 
jvzoggel$ oc new-project "3scalegateway" --display-name="gateway" --description="Rubix 3scale gateway on OpenShift demo"
Now using project "3scalegateway" on server "https://192.168.99.100:8443".

You can add applications to this project with the 'new-app' command. For example, try:

    oc new-app centos/ruby-22-centos7~https://github.com/openshift/ruby-ex.git

to build a new example application in Ruby.

The next step is to set a configuration variable which the APICast image will use to connect on runtime to the 3Scale SaaS environment to download the configuration. The string needs the 3Scale SaaS Access Token and your MY_ACCOUNT-admin.3scale.net.

 
jvzoggel$ oc secret new-basicauth apicast-configuration-url-secret --password=https://MY_ACCESS_TOKEN@jvzoggel-admin.3scale.net
secret/apicast-configuration-url-secret

We are now going to create a new application in our project which uses a template to retrieve it’s 3Scale image and configuration settings. You can check out the template by checking the URL in your browser.

jvzoggel$ oc new-app -f https://raw.githubusercontent.com/3scale/apicast/master/openshift/apicast-template.yml
--> Deploying template "3scalegateway/3scale-gateway" for "https://raw.githubusercontent.com/3scale/apicast/master/openshift/apicast-template.yml" to project 3scalegateway

     3scale-gateway
     ---------
     3scale API Gateway

     * With parameters:
        * CONFIGURATION_URL_SECRET=apicast-configuration-url-secret
        * CONFIGURATION_FILE_PATH=
        * IMAGE_NAME=quay.io/3scale/apicast:master
        * DEPLOYMENT_ENVIRONMENT=production
        * APICAST_NAME=apicast
        * RESOLVER=
        * SERVICES_LIST=
        * CONFIGURATION_LOADER=boot
        * BACKEND_CACHE_HANDLER=strict
        * LOG_LEVEL=
        * PATH_ROUTING=false
        * RESPONSE_CODES=false
        * CONFIGURATION_CACHE=
        * REDIS_URL=
        * OAUTH_TOKENS_TTL=604800
        * MANAGEMENT_API=status
        * OPENSSL_VERIFY=false
        * REPORTING_THREADS=0

--> Creating resources ...
    deploymentconfig "apicast" created
    service "apicast" created
--> Success
    Application is not exposed. You can expose services to the outside world by executing one or more of the commands below:
     'oc expose svc/apicast' 
    Run 'oc status' to view your app.<span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start"></span>

Your 2 pods should spin uo in OpenShift and make sure to check the Logs if no errors are there.

We need to expose our pods to incoming traphic by adding a route through the OpenShift console or through the oc command. I assume you know how to add a route through the console, so here is the command:

 
jvzoggel$ oc expose svc/apicast --name=apicast --hostname=apicast.rubix.local
route "apicast" exposed

Now we can hit our api endpoint. Since I need to hit the API endpoint with apicast.rubix.local which is not known on my host machine, I could edit the /etc/hosts file. But because I don’t like to fill up my hosts I add a HTTP Host header with my request containing the correct endpoint.

 
jvzoggel$ curl "http://192.168.99.100/echo?user_key=MY_KEY" -H "Host: apicast.rubix.local"
{
  "method": "GET",
  "path": "/echo",
  "args": "user_key=my_key_was_here",
  "body": "",
  "headers": {
    "HTTP_VERSION": "HTTP/1.1",
    "HTTP_HOST": "echo-api.3scale.net",
    "HTTP_ACCEPT": "*/*",
    "HTTP_USER_AGENT": "curl/7.54.0",
    "HTTP_X_3SCALE_PROXY_SECRET_TOKEN": "Shared_secret_sent_from_proxy_to_API_backend",
    "HTTP_X_REAL_IP": "172.17.0.1",
    "HTTP_X_FORWARDED_FOR": "192.168.99.1, 89.200.44.122, 10.0.101.13",
    "HTTP_X_FORWARDED_HOST": "echo-api.3scale.net",
    "HTTP_X_FORWARDED_PORT": "443",
    "HTTP_X_FORWARDED_PROTO": "https",
    "HTTP_FORWARDED": "for=10.0.101.13;host=echo-api.3scale.net;proto=https"
  },
  "uuid": "711e9799-1234-1234-b8b6-4287541238"
}jvzoggel:~ jvzoggel$ 

And to proof the statistics, the 3Scale SaaS dashboards show us the metrics:

So setting up 3ScaleAPICast in OpenShift is relatively easy. Further configuring APICast, setting up OpenShift routes between your consumers and API’s and adding (REDIS) caching adds more complexity, but still hope this helps!

References

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Posted by on 11-12-2017 in Uncategorized

 

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How to run the 3Scale APICast Gateway in a Docker container ?

With the rise of API popularity and the necessity for decent API Management some relatively new players emerged. And by know almost all are acquired by bigger fish in the software pond. One of these leading API Management software companies was 3Scale and in 2016 is was acquired by Red Hat. 3Scale then was a SaaS API Management offering only. Soon after the acquisition however Mike Piech, vice president and general manager of middleware at Red Hat, wrote in a blog post:

“3scale is today offered in an as-a-Service model and joins Red Hat OpenShift Online and Red Hat Mobile Application Platform in that format. We plan to quickly create an on-prem version and open source the code in the Red Hat way.”

The cloud hosted API gateway service APICast was published to GitHub. And in Q2 2017 the officially announcement was there that the Red Hat 3Scale API management platform was available as a Docker container and stand-alone installation for deployment on-premise. So now the implementation choice roughly consists of full SaaS and 3 on-premise variations as vanille Docker, Red Hat OpenShift and stand-alone.

This blogpost will show the steps and commands how to run the 3Scale APICast Gateway in “vanille” Docker containers.

High Level Overview

The commands

What we need:

  • Endpoint for the local API to hit, like api.rubix.local
  • Endpoint of the 3Scale SaaS environment, like jvzoggel-admin.3scale.net)
  • provider api key which is something like 93b21fc40335f58ee3a93d5a5c343 and can be found under your 3Scale SaaS account
  • user key which is shown at the bottom of the SaaS API Configuration screen in the curl example or can be found in Application -> your app

API endpoint to hit

 

First we will create a rubix.local Docker Network for our Apicast and API client nodes to run in:

jvzoggel$ docker network create rubix.local
142fd0f9e4a5392f2cdd90c2a625edf655f89a56b026e3c2082060521a39f6b5

We will start the 3Scale APICast Gateway docker image and configure it to port forward 8080, connect to the rubix.local network and use the environment property THREESCALE_PORTAL_ENDPOINT to make connection to our 3Scale SaaS environment to retrieve the API configuration.

jvzoggel$ docker run --name apicast --net=rubix.local --rm -p 8080:8080 -h apicast.rubix.local -e THREESCALE_PORTAL_ENDPOINT=https://PROVIDERKEY@jvzoggel-admin.3scale.net registry.access.redhat.com/3scale-amp21/apicast-gateway:1.4-2
dnsmasq[8]: started, version 2.76 cachesize 1000
dnsmasq[8]: compile time options: IPv6 GNU-getopt DBus no-i18n IDN DHCP DHCPv6 no-Lua TFTP no-conntrack ipset auth no-DNSSEC loop-detect inotify
dnsmasq[8]: using nameserver 8 #0 dnsmasq[8]: reading /etc/resolv.conf
dnsmasq[8]: using nameserver options#0
dnsmasq[8]: using nameserver 127.0.0.11#53
dnsmasq[8]: cleared cache

The API Gateway is running as apicast.rubix.local, the same endpoint URI as configured in the SaaS environment. So it’s time to hit it with our first request. We are going to use a Centos docker image as an API client and run it in interactive mode.

jvzoggel$ docker run --name centos --net=rubix.local --rm -it -h centos.rubix.local centos:latest bash
[root@centos /]# hostname
centos.rubix.local

We can first check if both docker instances can connect to each other with a ping. After that is proven we execute the following command which will connect to the Apicast docker image on our rubix.local network. The Apicast instance will download the configuration from the 3Scale SaaS solution and route our API call to the configured echo service back-end.

[root@centos /]# curl "http://apicast.rubix.local:8080/echo?user_key=USERKEY"

{
"method": "GET",
"path": "/echo",
"args": "user_key=XXXXXX",
"body": "",
"headers": {
"HTTP_VERSION": "HTTP/1.1",
"HTTP_HOST": "echo-api.3scale.net",
"HTTP_ACCEPT": "*/*",
"HTTP_USER_AGENT": "curl/7.29.0",
"HTTP_X_3SCALE_PROXY_SECRET_TOKEN": "Shared_secret_sent_from_proxy_to_API_backend",
"HTTP_X_REAL_IP": "172.20.0.3",
"HTTP_X_FORWARDED_FOR": "145.15.244.22, 10.0.101.15",
"HTTP_X_FORWARDED_HOST": "echo-api.3scale.net",
"HTTP_X_FORWARDED_PORT": "443",
"HTTP_X_FORWARDED_PROTO": "https",
"HTTP_FORWARDED": "for=10.0.101.13;host=echo-api.3scale.net;proto=https",
"HTTP_CONNECTION": "close"
},
"uuid": "24e5737c-c3ff-4333-bbbb<span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start"></span>-6030aaea6521"

Hope it helps !

 
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Posted by on 28-11-2017 in Uncategorized

 

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