Flexible instance types #314

JoshVanL · 2018-06-18T20:00:43Z

What this PR does / why we need it:
Although users are already able to chose their own instance types, this validates the supported types and restricts the types available to master

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #310

NONE

JoshVanL · 2018-06-18T20:04:16Z

This adds some validation to the instance types and restricts the master instance types.
/cc @MattiasGees
What do you think?

MattiasGees

@JoshVanL general gist. I think this is what we want. I made some extra comments.

It would also be great if we can document this feature in the docs.

MattiasGees · 2018-06-19T08:26:20Z

pkg/tarmak/cluster/cluster.go

-// Verify cluster
-func (c *Cluster) Verify() (result error) {
-	return c.VerifyInstancePools()
+	if err := c.Environment().Provider().ValidateInstanceTypes(c.InstancePools()); err != nil {


I think this needs to become a verify check and not an validate check. This will contact AWS and is a more expensive call. This is to keep working in line with #280

MattiasGees · 2018-06-19T08:26:37Z

pkg/tarmak/cluster/cluster.go

-// Verify instance pools
-func (c *Cluster) VerifyInstancePools() (result error) {
+// Verify cluster
+func (c *Cluster) Verify() error {


Why remove the VerifyInstancePools?

MattiasGees · 2018-06-19T08:28:12Z

pkg/tarmak/provider/amazon/amazon.go

+	return []string{"io1", "gp2", "st1", "sc1"}
+}
+
+func (a *Amazon) awsInstanceTypes() []string {


I think you are missing some newer instance types, is there a way to make this dynamic and check this through an AWS call?

I've had a look and I can't find a straight forward way of achieving this. I've updated this list though

MattiasGees · 2018-06-19T08:29:46Z

pkg/tarmak/provider/amazon/amazon.go

 		}

 		if err := a.verifyInstanceType(instanceType, instance.Zones(), svc); err != nil {
 			result = multierror.Append(result, err)
 		}
+
+		if instance.Name() == "master" {


I think we also should do a check for vault and etcd. I don't think we should run these on burstable (t) types.

MattiasGees · 2018-06-21T10:29:50Z

I tested this and this works great.
I encountered one problem. When we use the default settings we assign to the instances atm we get verification errors due to small instance types :). So I think we should adjust that.

Currently we set etcd to small and vault to tiny which translates to an t2.medium and t2.nano.

For etcd I would switch the default to an m5.large but for vault I am not sure we should go that big as we only request SSL certs from time to time and don't do anything heavy on it.

JoshVanL · 2018-06-21T11:46:56Z

I have bumped up etcd instances to use medium (m4.large) as default at init. I think there should be some consensus though on these sizes and what vault should have / be burstable.

MattiasGees · 2018-06-21T13:29:22Z

@JoshVanL I discussed this a bit with @simonswine. We agreed that denying of certain instance types shouldn't happen.
As for development environments we can see it happen that you run way less and that a burst-able type could work. We agreed instead of giving an error that a warning like It is not advised to use t2.nano for etcd would be better. Is that something we can implement in an easy way?

JoshVanL · 2018-06-21T13:33:33Z

@MattiasGees yes that can be done easily

MattiasGees · 2018-06-21T16:30:14Z

/lgtm

MattiasGees · 2018-06-22T16:25:01Z

@JoshVanL I tried bringing up a cluster with smallest instances for etcd and master, but couldn't see any warnings displayed. So I think there is something wrong with the warning logger.

JoshVanL · 2018-06-25T13:01:54Z

@MattiasGees
Thanks Mattias for spotting, should be fixed now

MattiasGees · 2018-06-26T09:14:45Z

Works now
/lgtm

jetstack-bot · 2018-07-10T08:24:21Z

New changes are detected. LGTM label has been removed.

JoshVanL · 2018-07-10T08:26:41Z

/assign @simonswine

jetstack-bot · 2018-07-31T07:48:16Z

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Signed-off-by: JoshVanL <[email protected]>

jetstack-bot · 2018-09-15T15:44:46Z

@JoshVanL: PR needs rebase.

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jetstack-bot · 2019-04-11T14:29:44Z

@JoshVanL: The following test failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
tarmak-puppet-module-tarmak-acceptance-1-14-centos	`650ca81`	link	`/test puppet-tarmak-acceptance-centos v1.14`

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jetstack-bot added do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. release-note-none Denotes a PR that doesn't merit a release note. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels Jun 18, 2018

jetstack-bot requested a review from simonswine June 18, 2018 20:00

MattiasGees suggested changes Jun 19, 2018

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JoshVanL force-pushed the 310-flexible-instance-type branch from f9af401 to 33d4de2 Compare June 20, 2018 18:55

JoshVanL changed the title ~~WIP: Flexible instance type~~ Flexible instance type Jun 20, 2018

jetstack-bot removed the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Jun 20, 2018

JoshVanL changed the title ~~Flexible instance type~~ Flexible instance types Jun 20, 2018

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JoshVanL force-pushed the 310-flexible-instance-type branch from d495954 to cef7b12 Compare July 10, 2018 08:24

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JoshVanL force-pushed the 310-flexible-instance-type branch from cef7b12 to 0e6576b Compare July 11, 2018 08:56

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JoshVanL force-pushed the 310-flexible-instance-type branch from 0e6576b to 48c42e9 Compare July 31, 2018 07:48

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JoshVanL force-pushed the 310-flexible-instance-type branch from 48c42e9 to f606621 Compare September 10, 2018 08:06

JoshVanL added 8 commits September 11, 2018 09:20

Include list of possible instance types for validation

52ed47c

Signed-off-by: JoshVanL <[email protected]>

Adds validation for volumes and master instance types

3ced6e8

Signed-off-by: JoshVanL <[email protected]>

Verify -> Validate and use result.ErrorOrNil where appropriate

533124a

Signed-off-by: JoshVanL <[email protected]>

Adds review changes

4f686e9

Signed-off-by: JoshVanL <[email protected]>

Update etcd instance to use medium size by default

bd07cb0

Signed-off-by: JoshVanL <[email protected]>

Warn instead of error on unadvised instance types

97d3972

Signed-off-by: JoshVanL <[email protected]>

Make use of type constants and compare type not name

8a16f84

Signed-off-by: JoshVanL <[email protected]>

Fixed amazon verification string matching

650ca81

Signed-off-by: JoshVanL <[email protected]>

JoshVanL force-pushed the 310-flexible-instance-type branch from f606621 to 650ca81 Compare September 11, 2018 08:21

jetstack-bot removed the needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. label Sep 11, 2018

jetstack-bot added the needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. label Sep 15, 2018

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Flexible instance types #314

Flexible instance types #314

JoshVanL commented Jun 18, 2018

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Flexible instance types #314

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Flexible instance types #314

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MattiasGees commented Jun 21, 2018

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