Improvements on the ACLs and bug fixing #320

restanrm · 2022-02-14T15:00:43Z

read the CONTRIBUTING guidelines
raised a GitHub issue or discussed it on the projects chat beforehand
added unit tests
[] added integration tests
updated documentation if needed
updated CHANGELOG.md

This PR is a first implementation of what has been discussed on #311 It should be reviewed commit by commit since last commits are linting modifications and changes quite much some part of the code that I didn't touch.

All subject discussed in PR #311 are not implemented here. I think all those modifications should be splitted in multiple PRs.

If this PR is too big, some commits could be moved outside of this PR it's related but just fixes some bugs on the ACLs parsing behavior.

kradalby · 2022-02-14T16:29:06Z

I will try to review this (probably in batches/rounds) throughout the week, but I would like to have the 0.13.0 features (#306 and #316) in first and aim for 0.14.0 for this.

kradalby · 2022-02-15T22:38:48Z

Can you have a look at the conflicts :)? all the other stuff is in now, and @juanfont will have a look at the proposal.

restanrm · 2022-02-16T22:29:06Z

Sorry I didn't saw your comment I'll look at it tomorrow. I'll need to work on integration tests also.

This commit change the default behaviour and remove the notion of namespaces between the hosts. It allows all namespaces to be only filtered by the ACLs. This behavior is closer to tailsnet.

This call should be done quite at each modification of a server resources like RequestTags. When a server changes it's tag we should rebuild the ACL rules. When a server is added to headscale we also should update the ACLRules.

Rewrite some function to get rid of the dependency on Headscale object. This allows us to write succinct test that are more easy to review and implement. The improvements of the tests allowed to write the removal of the tagged hosts from the namespace as specified here: https://tailscale.com/kb/1068/acl-tags/

This is a false positive on the way the function is built. Small tests cases are all inside this functions, making it big.

restanrm · 2022-02-17T08:36:02Z

I've rebased the modifications on latest main branch

kradalby

Some starters, have not started on the code yet

CHANGELOG.md

utils.go

kradalby · 2022-02-18T19:33:26Z

machine.go

+	// Aclfilter peers here. We are itering through machines in all namespaces and search through the computed aclRules
+	// for match between rule SrcIPs and DstPorts. If the rule is a match we allow the machine to be viewable.
+
+	// FIXME: On official control plane if a rule allow user A to talk to user B but NO rule allows user B to talk to


This should be a github issue

kradalby

I think this is looking very promising!

I have left comments on the "input data" for tests for the ACLs, its quite hard to follow when using foo, bar, etc. Would be great if you could change that to descriptive, unique values and I will review that section again.

Otherwise, the expand* tests looks quite sensible and well covering, easy to extend!

There is a couple of other naming nits, but mostly good, thanks.

acls.go

acls_test.go

kradalby · 2022-02-19T07:19:15Z

acls_test.go

+// match properly the IP's of the related hosts. The owner is valid and the tag is also valid.
+// the tag is matched in the Users section.
+func (s *Suite) TestValidExpandTagOwnersInUsers(c *check.C) {
+	namespace, err := app.CreateNamespace("foo")


Suggested change

namespace, err := app.CreateNamespace("foo")

namespace, err := app.CreateNamespace("validate-tagowner-expands-in-user")

Test values should be descriptive and independent, this makes it a lot easier to follow the tests as you read them without having to go up and down to check if foo was a hostname or bar was a tag, group, or user.

If they have description based on the test their a part of, e.g. tagValidateTagOwnerExpandsInUser for tag, it will also guarantee that the tag is independent and will not interfere with other parts of the tests (even if the test framework is suppose to sort this.

I changed for more explicit names, username for namespaces, teams for groups and groups of servers for tags. It's better than before but not up to what you describe here.

Better thanks, when using the same values in adjacent tests, we don't make them independent of each other, but we can let this go for now and I can do a follow up PR and you have help me review it.

With pleasure !

machine.go

Co-authored-by: Kristoffer Dalby <[email protected]>

Using h.ListAllMachines also listed the current machine in the result. It's unnecessary (I don't know if it's harmful). Breaking the check with the `matchSourceAndDestinationWithRule` broke the tests. We have a specificity with the '*' destination that isn't symetrical. I need to think of a better way to do this. It too hard to read.

kradalby

Just a couple more nits and I think we can take this for a spin.

machine.go

acls_test.go

This should fix the performance issue with computation of `dst` variable. It's also easier to read now.

added a simple filter to remove the current node

The dependency to the `headscale` struct makes tests harder to do. This change allow to easily add some tests for this quite sensible function.

kradalby · 2022-02-21T10:43:14Z

Could you run prettier lint?

And I see the integration test fail, but I can't really see why, and not sure if any of the changes should really affect it.

Could you have a dive?

Other than that I think I'm happy to get it in :)

restanrm · 2022-02-21T16:28:07Z

Could you run prettier lint?

And I see the integration test fail, but I can't really see why, and not sure if any of the changes should really affect it.

Could you have a dive?

Other than that I think I'm happy to get it in :)

Linting is done. For the integrations tests, I see some mentions of ACL parsing in the logs and calls seems to go through getFilteredByACLPeers. I couldn't find where the ACL are read from. It can be a good explanation for the errors of the integrations tests. It's also possible that my code that check presence of ACLs is wrong. I'll try to dive into it tonight.

kradalby · 2022-02-21T17:17:37Z

It looks like there is nil pointer as a result to a call to the /map endpoint:

2022/02/21 17:17:03 [Recovery] 2022/02/21 - 17:17:03 panic recovered:
POST /machine/3efd0dd32dc939483bad4d7bf4a5ce2af31a1a0a294c7a4ece72a16918c06c17/map HTTP/1.1
Host: headscale:8080
Accept-Encoding: gzip
Content-Length: 641
User-Agent: Go-http-client/1.1


runtime error: invalid memory address or nil pointer dereference
/usr/local/go/src/runtime/panic.go:221 (0x44d686)
/usr/local/go/src/runtime/signal_unix.go:735 (0x44d656)
/go/src/headscale/acls.go:94 (0xcee90a)
/go/src/headscale/acls.go:76 (0xcee7c4)
/go/src/headscale/poll.go:98 (0xd0ce39)
/go/pkg/mod/github.com/gin-gonic/[email protected]/context.go:168 (0xb6ceb4)
/go/pkg/mod/github.com/zsais/[email protected]/middleware.go:364 (0xb6ce95)
/go/pkg/mod/github.com/gin-gonic/[email protected]/context.go:168 (0x946dc1)
/go/pkg/mod/github.com/gin-gonic/[email protected]/recovery.go:99 (0x946dac)
/go/pkg/mod/github.com/gin-gonic/[email protected]/context.go:168 (0x946026)
/go/pkg/mod/github.com/gin-gonic/[email protected]/logger.go:241 (0x946009)
/go/pkg/mod/github.com/gin-gonic/[email protected]/context.go:168 (0x945570)
/go/pkg/mod/github.com/gin-gonic/[email protected]/gin.go:555 (0x9451d8)
/go/pkg/mod/github.com/gin-gonic/[email protected]/gin.go:511 (0x944d11)
/usr/local/go/src/net/http/server.go:2879 (0x75457a)
/usr/local/go/src/net/http/server.go:1930 (0x74fc27)
/usr/local/go/src/runtime/asm_amd64.s:1581 (0x469240)

Ill see if I can come up with a suggestion before I have to go out again.

poll.go

acls.go

kradalby · 2022-02-21T17:27:11Z

poll.go

+	err = h.UpdateACLRules()
+	if err != nil {
+		log.Error().
+			Caller().
+			Str("func", "handleAuthKey").
+			Str("machine", machine.Name).
+			Err(err)
+	}


Suggested change

err = h.UpdateACLRules()

if err != nil {

log.Error().

Caller().

Str("func", "handleAuthKey").

Str("machine", machine.Name).

Err(err)

}

if h.aclPolicy != nil {

err = h.UpdateACLRules()

if err != nil {

log.Error().

Caller().

Str("func", "handleAuthKey").

Str("machine", machine.Name).

Err(err)

}

}

This should do it.

But open to better solutions.

I've opted for both adding error to the callee and avoiding error case on caller side. The callee still need to report and error since it can generate errors if no ACLPolicies are defined.

As for the placement of this piece of code, I'm also open to suggestion. I've put it here but don't know well enough the code to find better place. We need to update the ACL when the HostInfo of the machines are modified, and when hosts are registered.

kradalby · 2022-02-21T17:34:39Z

As a side note, we should probably have integration tests for ACL, but that can be done in the future, want to clean them up and remove all the shared stuff first

If aclPolicy is not defined, in updateAclPolicy, return an error.

restanrm · 2022-02-21T19:11:48Z

As a side note, we should probably have integration tests for ACL, but that can be done in the future, want to clean them up and remove all the shared stuff first

Yes I wanted to do it but here, but the PR is big enough. We should create a issue for this subject as well.

Co-authored-by: Kristoffer Dalby <[email protected]>

kradalby · 2022-02-21T21:40:49Z

Good job, lets do it, I think I will release this as a beta straight away.

kradalby · 2022-02-21T21:41:12Z

Would you mind creating the issues mentioned in this PR @restanrm ?

restanrm · 2022-02-22T08:22:24Z

Would you mind creating the issues mentioned in this PR @restanrm ?

Yes, I'll create it now

restanrm force-pushed the feat-improve-acls-usage branch from 9c23400 to 9643a5a Compare February 14, 2022 17:26

madjam002 and others added 12 commits February 17, 2022 09:27

Return all peers instead of peers in same namespace

9b7d657

feat(machine): add ACLFilter if ACL's are enabled.

e482dfe

This commit change the default behaviour and remove the notion of namespaces between the hosts. It allows all namespaces to be only filtered by the ACLs. This behavior is closer to tailsnet.

feat(acls): simplify updating rules

e9949b4

feat(acls): check acl owners and add bunch of tests

fb45138

feat(acl): update frequently the aclRules

97eac3b

This call should be done quite at each modification of a server resources like RequestTags. When a server changes it's tag we should rebuild the ACL rules. When a server is added to headscale we also should update the ACLRules.

docs(acl): add configuration example to explain acls

7b5ba9f

docs(changelog): bump changelog

aceaba6

chore(all): update some files for linter

9cedbba

chore(fmt): apply make fmt command

d8c4c31

chore(lint): more lint fixing

5f642ee

chore(lint): ignore linting on test_expandalias

f073d8f

This is a false positive on the way the function is built. Small tests cases are all inside this functions, making it big.

restanrm force-pushed the feat-improve-acls-usage branch from 3127a61 to f073d8f Compare February 17, 2022 08:33

Merge branch 'main' into feat-improve-acls-usage

21df798

kradalby mentioned this pull request Feb 18, 2022

Issues with current ACL implementation and solution proposal #311

Merged

kradalby reviewed Feb 18, 2022

View reviewed changes

This was referenced Feb 18, 2022

Allow ACLs to be written as YAML #326

Closed

Replace oidc.domain_map with email to namespace #327

Closed

Remove the concept of "shared machine/node" #328

Closed

Rename Namespace to User #329

Closed

kradalby reviewed Feb 19, 2022

View reviewed changes

Apply suggestions from code review on changelog

4f9ece1

Co-authored-by: Kristoffer Dalby <[email protected]>

restanrm requested a review from juanfont as a code owner February 20, 2022 19:47

restanrm added 2 commits February 20, 2022 21:26

fix(acls,machines): apply code review suggestions

d00251c

fix(tests): fix naming issues related to code review

5e167cc

restanrm added 2 commits February 20, 2022 23:47

fix(machines): renaming following review comments

5242025

kradalby reviewed Feb 21, 2022

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acls_test.go Show resolved Hide resolved

kradalby and others added 6 commits February 21, 2022 08:51

Merge branch 'main' into feat-improve-acls-usage

ecb3ee6

fix(machines): simplify complex if check

960412a

This should fix the performance issue with computation of `dst` variable. It's also easier to read now.

fix(machines): use ListAllMachines function

9c6ce02

added a simple filter to remove the current node

feat(machines): untie dependency with class for filter func

f006860

The dependency to the `headscale` struct makes tests harder to do. This change allow to easily add some tests for this quite sensible function.

tests(machines): test all combinations of peer filtering

5ab6237

chore(machines): apply lint

4bbe005

restanrm added 2 commits February 21, 2022 16:06

chore(format): run prettier on repo

25550f8

chore(linter): ignore tt var as it's generated code (vscode)

211fe40

kradalby reviewed Feb 21, 2022

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kradalby reviewed Feb 21, 2022

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acls.go Show resolved Hide resolved

kradalby reviewed Feb 21, 2022

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fix: add error checking in acl and poll

50af44b

If aclPolicy is not defined, in updateAclPolicy, return an error.

restanrm and others added 3 commits February 21, 2022 20:25

Update acls_test.go

baae266

Co-authored-by: Kristoffer Dalby <[email protected]>

chore(fmt): apply fmt

650108c

fix(acls_test): fix comment in go code

d971f0f

kradalby approved these changes Feb 21, 2022

View reviewed changes

kradalby merged commit 69cdfbb into juanfont:main Feb 21, 2022

restanrm deleted the feat-improve-acls-usage branch February 22, 2022 08:24

kradalby mentioned this pull request Apr 27, 2023

ACL refactor #1381

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Improvements on the ACLs and bug fixing #320

Improvements on the ACLs and bug fixing #320

restanrm commented Feb 14, 2022

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restanrm commented Feb 22, 2022

	namespace, err := app.CreateNamespace("foo")
	namespace, err := app.CreateNamespace("validate-tagowner-expands-in-user")

Improvements on the ACLs and bug fixing #320

Improvements on the ACLs and bug fixing #320

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