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E2E test - 50 nodes #2260
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E2E test - 50 nodes #2260
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472504a
50 node cluster api model
jackfrancis 95b4ab4
more idiomatic 50 node cluster
jackfrancis a61c0eb
let’s try this
jackfrancis 1ef0e3b
managed disk needs availability set
jackfrancis de59b80
debug
jackfrancis 883c655
more debug
jackfrancis 7640178
more more debug
jackfrancis 5cb10d3
dynamic tiller max history e2e test
jackfrancis f97bbc7
tiller max-history test description
jackfrancis 0a8e718
remove debug, absorb ssh errors
jackfrancis c8e1c70
better debug
jackfrancis d864494
simplified tiller tests
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39 changes: 39 additions & 0 deletions
39
examples/e2e-tests/kubernetes/node-count/50-nodes/definition.json
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,39 @@ | ||
{ | ||
"apiVersion": "vlabs", | ||
"properties": { | ||
"orchestratorProfile": { | ||
"orchestratorType": "Kubernetes", | ||
"orchestratorRelease": "1.8" | ||
}, | ||
"masterProfile": { | ||
"count": 5, | ||
"dnsPrefix": "", | ||
"vmSize": "Standard_D2_v2", | ||
"OSDiskSizeGB": 200 | ||
}, | ||
"agentPoolProfiles": [ | ||
{ | ||
"name": "agentpool1", | ||
"count": 50, | ||
"vmSize": "Standard_D2_v2", | ||
"osType": "Linux", | ||
"storageProfile": "ManagedDisks", | ||
"availabilityProfile": "AvailabilitySet" | ||
} | ||
], | ||
"linuxProfile": { | ||
"adminUsername": "azureuser", | ||
"ssh": { | ||
"publicKeys": [ | ||
{ | ||
"keyData": "" | ||
} | ||
] | ||
} | ||
}, | ||
"servicePrincipalProfile": { | ||
"clientId": "", | ||
"secret": "" | ||
} | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
|
@@ -125,23 +125,20 @@ var _ = Describe("Azure Container Cluster using the Kubernetes Orchestrator", fu | |
}) | ||
|
||
It("should have tiller running", func() { | ||
if eng.HasTiller() { | ||
if hasTiller, tillerAddon := eng.HasTiller(); hasTiller { | ||
running, err := pod.WaitOnReady("tiller", "kube-system", 3, 30*time.Second, cfg.Timeout) | ||
Expect(err).NotTo(HaveOccurred()) | ||
Expect(running).To(Equal(true)) | ||
} else { | ||
Skip("tiller disabled for this cluster, will not test") | ||
} | ||
}) | ||
|
||
It("should have a tiller max-history of 5", func() { | ||
if eng.HasTiller() { | ||
pods, err := pod.GetAllByPrefix("tiller-deploy", "kube-system") | ||
Expect(err).NotTo(HaveOccurred()) | ||
// There is only one tiller pod and one container in that pod. | ||
actualTillerMaxHistory, err := pods[0].Spec.Containers[0].GetEnvironmentVariable("TILLER_HISTORY_MAX") | ||
Expect(err).NotTo(HaveOccurred()) | ||
Expect(actualTillerMaxHistory).To(Equal("5")) | ||
if tillerAddon.Config != nil { | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Would this ever be nil? What happens if it is? There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. The current configuration enforces always non-nil: https://github.com/Azure/acs-engine/blob/master/pkg/acsengine/defaults.go#L752 So the above is just for good hygiene. |
||
By("Ensuring that the correct max-history has been applied") | ||
maxHistory := tillerAddon.Config["max-history"] | ||
pods, err := pod.GetAllByPrefix("tiller-deploy", "kube-system") | ||
Expect(err).NotTo(HaveOccurred()) | ||
// There is only one tiller pod and one container in that pod. | ||
actualTillerMaxHistory, err := pods[0].Spec.Containers[0].GetEnvironmentVariable("TILLER_HISTORY_MAX") | ||
Expect(err).NotTo(HaveOccurred()) | ||
Expect(actualTillerMaxHistory).To(Equal(maxHistory)) | ||
} | ||
} else { | ||
Skip("tiller disabled for this cluster, will not test") | ||
} | ||
|
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In the docs (https://github.com/Azure/acs-engine/blob/master/docs/kubernetes-large-clusters.md)
We recommend the use of smaller pools (e.g., count of 20) over larger pools (e.g., count of 100); produce your desired total node count with lots of pools, as opposed to as few as possible.
Would it make sense to change this to several smaller pools since people are likely to look at example files and to copy them for their own implementation?There was a problem hiding this comment.
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@amanohar @khenidak Is the above guidance still valid? (i.e., don't use node pools > 20 count)
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i admit this answer is not as clear as i would love it to be
From one end 50 nodes with 4+ pools will hit ARM template limit (800 object). From another, I really don't see a relationship between # of nodes per pool and scale. As long as we don't hit more than 100 per availability set (or scale set) we are fine.
Many pools are better because users will get extra load balancers (Extra public IPs), smaller blast radius (in case of failures). They are however harder to manager