[Hawkular-dev] integrating ansible and hawkular to start remote wildfly servers

[John Mazzitelli]

> So Ansible is supposed to be already installed and available on the machine
> / (docker container)  running Hawkular Services, right ?

Correct. This is assuming "ansible-playbook" is available and on the PATH so it can be executed. Obviously, we can do this however we want (ship with Ansible ourselves so we know where it is, or have it configurable so we can tell Hawkular where the Ansible executable is, etc.). Again, this was just a PoC to get this working, but as of right now, the PoC requires Ansible to already be installed and available.

----- Original Message -----
> So Ansible is supposed to be already installed and available on the machine
> / (docker container)  running Hawkular Services, right ?
> 
> Thomas
> 
> 
> 
> On Fri, Jul 15, 2016 at 3:57 AM, John Mazzitelli <mazz at redhat.com> wrote:
> 
> > Slight change - I found out there is a feature in feature-pack stuff that
> > let you ship with direct file content that gets copied into the server. So
> > I put the Ansible scripts in the feature pack. This is the correct way to
> > do it. Now anyone building the server with the feature pack (integration
> > tests, for example) will get the Ansible integration as well.
> >
> > So link [3] changes from my original email. It is now:
> >
> > [3]
> > https://github.com/jmazzitelli/hawkular-services/tree/HAWKULAR-1096-ansible-commands/feature-pack/src/main/content/standalone/configuration/ansible
> >
> > ----- Original Message -----
> > > I have a very simple PoC working that shows Ansible integrated with
> > Hawkular
> > > such that it can start a WildFly server remotely.
> > >
> > > I'll begin with a brief summary.
> > >
> > > SUMMARY
> > >
> > > A client connects to the Hawkular Server via its websocket and passes in
> > a
> > > JSON request (like it does the other kinds of requests). The JSON request
> > > looks something like:
> > >
> > >   AnsibleRequest={"playbook":"start-wildfly.yml", "extraVars": {
> > >   "wildfly_home_dir":"/opt/wildfly10" } }
> > >
> > > The command-gateway server takes the request, runs the Ansible playbook,
> > and
> > > returns the response back over the websocket to the client with an
> > > AnsibleResponse (which includes the Ansible output to show what it did).
> > >
> > > DETAILS
> > >
> > > The code is in two branches in my repos. See [1] and [2]. You need both
> > for
> > > this to work.
> > >
> > > Hawkular-Services packages up Ansible playbooks and its associated files
> > in
> > > standalone/configuration/ansible. See [3].
> > >
> > > Hawkular-Commons adds to command gateway a new JSON request/response for
> > > Ansible requests. See [4] and [5].
> > >
> > > The Ansible command is invoked in the server when the AnsibleRequest
> > JSON is
> > > received over the websocket. This command implementation runs the Ansible
> > > playbook and returns the results back in a AnsibleResponse. See [6].
> > >
> > > If you build commons and then services to pull the new commons in, you
> > can
> > > run a test to see it work. I use the test command CLI utility in the
> > agent
> > > to do this [7]. First, build the new dist and run it so you have a
> > Hawkular
> > > Service running (for example, "mvn clean install -Pdev,embeddedc"). Next,
> > > create a test JSON request file (say, "/tmp/hawkular.json") with this
> > > content:
> > >
> > > { "playbook":"start-wildfly.yml",
> > >   "extraVars": {
> > >      "wildfly_home_dir":"/directory/where/you/installed/wildfly"
> > >   }
> > > }
> > >
> > > Now build the hawkular-agent from source (just so you get the test
> > command
> > > CLI utility) and run the test command CLI, telling it to use the JSON in
> > > your file and send it to your Hawkular Service server:
> > >
> > > $ cd
> > >
> > <hawkular-agent-source-dir>/hawkular-wildfly-agent-itest-parent/hawkular-wildfly-agent-command-cli/target
> > >
> > > $ java -jar hawkular-wildfly-agent-command-cli-*.jar --username jdoe
> > > --password password \
> > >        --command AnsibleRequest --request-file=/tmp/hawkular.json
> > >
> > > This sends the request to your local Hawkular Service server over the
> > > websocket, the Ansible playbook "start-wildfly.yml" is run, which starts
> > the
> > > WildFly in that home dir you specified in your JSON request, and the
> > > response is sent back. The Command CLI tool will write the responses it
> > > receives to disk - look at the cli output for the names of the files it
> > > writes - you can look in there to see what the Ansible command response
> > was
> > > (its just the full Ansible output).
> > >
> > > There is still LOTS to do here (for one, you'll notice it assumes your
> > > wildfly install is on "localhost" :)). This is merely a PoC that we can
> > use
> > > as a starting point - it shows that this can be done and how we can do
> > it.
> > >
> > > -- John Mazz
> > >
> > > [1]
> > >
> > https://github.com/jmazzitelli/hawkular-commons/tree/HAWKULAR-1096-ansible-commands
> > > [2]
> > >
> > https://github.com/jmazzitelli/hawkular-services/tree/HAWKULAR-1096-ansible-commands
> > > [3]
> > >
> > https://github.com/jmazzitelli/hawkular-services/tree/HAWKULAR-1096-ansible-commands/dist/src/main/resources/standalone/configuration/ansible
> > > [4]
> > >
> > https://github.com/jmazzitelli/hawkular-commons/blob/HAWKULAR-1096-ansible-commands/hawkular-command-gateway/hawkular-command-gateway-api/src/main/resources/schema/AnsibleRequest.schema.json
> > > [5]
> > >
> > https://github.com/jmazzitelli/hawkular-commons/blob/HAWKULAR-1096-ansible-commands/hawkular-command-gateway/hawkular-command-gateway-api/src/main/resources/schema/AnsibleResponse.schema.json
> > > [6]
> > >
> > https://github.com/jmazzitelli/hawkular-commons/blob/HAWKULAR-1096-ansible-commands/hawkular-command-gateway/hawkular-command-gateway-war/src/main/java/org/hawkular/cmdgw/command/ws/AnsibleCommand.java
> > > [7]
> > >
> > https://github.com/hawkular/hawkular-agent/tree/master/hawkular-wildfly-agent-itest-parent/hawkular-wildfly-agent-command-cli
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