Upgrade from 1.7.9 to 1.9.3

[todoesverso]

Is this a request for help?:
Yes

Is this an ISSUE or FEATURE REQUEST? (choose one):
ISSUE

What version of acs-engine?:
Version: v0.13.1
GitCommit: 797dd91
GitTreeState: clean

---

Orchestrator and version (e.g. Kubernetes, DC/OS, Swarm)
k8s 1.7.9 upgraded to 1.8.8

What happened:
I had 1.7.9 deployed from a clean acs-engine deploy using the example/kubernetes.json.
Then I upgraded using acs-engine upgrade --upgrade-version 1.8.8, which corretly upgraded my cluster.
Intermediately after that I run acs-engine upgrade --upgrade-version 1.9.3 and got a failure

FATA[0007] version 1.9.3 is not supported
What you expected to happen:
T obe able to upgrade k8s to 1.9.3.

How to reproduce it (as minimally and precisely as possible):
acs-engine deploy --api-model example/kubernetes.json
acs-engine upgrade --upgrade-version 1.8.8 --deployment-dir _output/test
acs-engine upgrade --upgrade-version 1.9.3 --deployment-dir _output/test

Anything else we need to know:
Not sure how things supposed to work, but what i see is that the apimodel.json file is not updated

$ grep -r 1.7.9 *
_output/test/azuredeploy.parameters.json:      "value": "k8s-gcrio.azureedge.net/hyperkube-amd64:v1.7.9"
_output/test/azuredeploy.json:    "orchestratorNameVersionTag": "Kubernetes:1.7.9",
_output/test/apimodel.json:      "orchestratorVersion": "1.7.9",

[CecileRobertMichon]

@todoesverso this is a known issue that was fixed with #2306. Right now the issue is fixed in master but the fix was not included in a release yet. Are you able to build from master?

[todoesverso]

It did worked although I still see 1.7.9 in some files, is that correct:

acs-engine-test$ grep -r 1.7.9 * _output/victor-acs-tests-5a9d5ec6/azuredeploy.parameters.json: "value": "k8s-gcrio.azureedge.net/hyperkube-amd64:v1.7.9" _output/victor-acs-tests-5a9d5ec6/azuredeploy.json: "orchestratorNameVersionTag": "Kubernetes:1.7.9", acs-engine-test$ grep -r 1.8.8 * _output/victor-acs-tests-5a9d5ec6/apimodel.json: "orchestratorVersion": "1.8.8",

[CecileRobertMichon]

As long as your apimodel.json file has the up-to-date version, I believe you should be able to perform successive upgrades. The azuredeploy.parameters.json and azuredeploy,json files were used for your original deployment.