This page (revision-37) was last changed on 23-Apr-2022 17:06 by Harry Metske

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Page References

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Apache Brooklyn...nobody
Apache Brooklyn

Version management

Difference between version and

At line 56 added 57 lines
! Deploy to other hosts
The next experiment was to deploy to a host other than the host where the brooklyn server is running.
So, therefore I fired up a second Docker container, arranged ssh and sudo access to that, and tried to deploy the following blueprint :
%%prettify
{{{
name: webnode1
services:
- type: brooklyn.entity.webapp.ControlledDynamicWebAppCluster
name: My Web
location:
byon:
hosts:
- brooklyn@172.17.0.76
brooklyn.config:
wars.root: http://search.maven.org/remotecontent?filepath=io/brooklyn/example/brooklyn-example-hello-world-sql-webapp/0.6.0/brooklyn-example-hello-world-sql-webapp-0.6.0.war
java.sysprops:
brooklyn.example.db.url: >
$brooklyn:formatString("jdbc:%s%s?user=%s&password=%s",component("db").attributeWhenReady("datastore.url"),"visitors", "brooklyn", "br00k11n")
- type: brooklyn.entity.database.mysql.MySqlNode
id: db
name: My DB
location:
byon:
hosts:
- brooklyn@172.17.0.76
brooklyn.config:
creationScriptUrl: https://bit.ly/brooklyn-visitors-creation-script
}}}
%%
Which basically is a copy of the previous excercise. Note that {{172.17.0.76}} is the IP address of the second Docker container {{brooklyn-node1}}.
This kept failing with {{No machines available in FixedListMachineProvisioningLocation}}.\\
Googled this, but in general you do not get much results foor Apache Brooklyn. After poking around quite a bit I concluded (not sure) that brooklyn can only run one service per location (except for localhost).
So I only added an additional host to the location, and it all worked fine.
Nice to see you get real time stats in your web UI (or REST if you like).
I ran a simple loadtest script against the application's URL, and you nicely see the effects on the stats.
Time for next experiment, autoscaling.
! AutoScaling
We want to be able to automatically scale the number of Tomcat instances, depending on something like response time or request rate.
! Run a Tomcat8 server.
! Use pools of locations by name
We want to use a pool of "servers" by name. I think it can be done by specifying locations in the {{brooklyn.properties}} file, and for example having a bunch of Docker containers available.
This page (revision-37) was last changed on 23-Apr-2022 17:06 by Harry MetskeTop