K8s cluster name is specified during login (for now) and gets plumbed to
a new extensions on the TLS cert. The name is validated against all
known k8s clusters reported via proxy heartbeats. If no name is
provided, the extension remains empty.
The name in the cert will get used by proxies for routing, once we fully
support multiple k8s clusters per teleport cluster.
This was tested with direct and github login flows.
This commit introduces GRPC API for streaming sessions.
It adds structured events and sync streaming
that avoids storing events on disk.
You can find design in rfd/0002-streaming.md RFD.
Our auth middleware already attaches a TLS identity as context value.
Plumb contexts through and extract the username when recording events.
If the received context doesn't have an identity attached, use "system"
as username.
Lots of noise here due to missing context.Context plumbing :(
We should eventually plumb contexts to all those RPC interfaces.
Updates #3816
* Add UpdateUser rpc to proto
* Differentiate between create and update in github,oidc,saml
* Edit updated_by event field to be more generic (used with contexts to capture user modifying records)
* Update security issue by removing secrets from user when update/upsert/create (forrest)
* Update createUser in resource_command and require force for updates
This commit fixes#3369, refs #3374
It adds support for kuberenetes_users section in roles,
allowing Teleport proxy to impersonate user identities.
It also extends variable interpolation syntax by adding
suffix and prefix to variables and function `email.local`:
Example:
```yaml
kind: role
version: v3
metadata:
name: admin
spec:
allow:
# extract email local part from the email claim
logins: ['{{email.local(external.email)}}']
# impersonate a kubernetes user with IAM prefix
kubernetes_users: ['IAM#{{external.email}}']
# the deny section uses the identical format as the 'allow' section.
# the deny rules always override allow rules.
deny: {}
```
Some notes on email.local behavior:
* This is the only function supported in the template variables for now
* In case if the email.local will encounter invalid email address,
it will interpolate to empty value, will be removed from resulting
output.
Changes in impersonation behavior:
* By default, if no kubernetes_users is set, which is a majority of cases,
user will impersonate themselves, which is the backwards-compatible behavior.
* As long as at least one `kubernetes_users` is set, the forwarder will start
limiting the list of users allowed by the client to impersonate.
* If the users' role set does not include actual user name, it will be rejected,
otherwise there will be no way to exclude the user from the list).
* If the `kuberentes_users` role set includes only one user
(quite frequently that's the real intent), teleport will default to it,
otherwise it will refuse to select.
This will enable the use case when `kubernetes_users` has just one field to
link the user identity with the IAM role, for example `IAM#{{external.email}}`
* Previous versions of the forwarding proxy were denying all external
impersonation headers, this commit allows 'Impesrsonate-User' and
'Impersonate-Group' header values that are allowed by role set.
* Previous versions of the forwarding proxy ignored 'Deny' section of the roles
when applied to impersonation, this commit fixes that - roles with deny
kubernetes_users and kubernetes_groups section will not allow
impersonation of those users and groups.
If an attacker can force a username change at an IdP, upon second login,
the services.User object of the original user can be updated with new
roles and traits. If these new roles and traits differ, the original
user can have their privileges raised (or lowered).
To mitigate this, encode roles and traits within the certificate and use
these when fetching roles to make RBAC decisions. If roles and traits are
not encoded within an certificate (for example for old style SSH
certificates then fallback to using the services.User object and log a
warning.
* Support resource-based bootstrapping for backend.
Outside of static configuration, most of the persistent state of an
auth server exists as a collection of resources, stored in its
backend. The resource API also forms the basis of Teleport's more
advanced dynamic configuration options.
This commit extends the usefulness of the resource API by adding
the ability to bootstrap backend state with a set of previously
exported resources. This allows the resource API to serve as a
rudimentary backup/migration tool.
Notes: This features is a work in progress, and very easy to misuse;
while it will prevent you from overwriting the state of an existing
auth server, it won't stop you from bootstrapping into a wildly
misconfigured state. In general, resource-based bootstrapping is
not a complete solution for backup or migration.
* update e-ref
This commit expands the usage of the caching layer
for auth server API:
* Introduces in-memory cache that is used to serve all
Auth server API requests. This is done to achieve scalability
on 10K+ node clusters, where each node fetches certificate authorities,
roles, users and join tokens. It is not possible to scale
DynamoDB backend or other backends on 10K reads per seconds
on a single shard or partition. The solution is to introduce
an in-memory cache of the backend state that is always used
for reads.
* In-memory cache has been expanded to support all resources
required by the auth server.
* Experimental `tctl top` command has been introduced to display
common single node metrics.
Replace SQLite Memory Backend with BTree
SQLite in memory backend was suffering from
high tail latencies under load (up to 8 seconds
in 99.9%-ile on load configurations).
This commit replaces the SQLite memory caching
backend with in-memory BTree backend that
brought down tail latencies to 2 seconds (99.9%-ile)
and brought overall performance improvement.
Moved expiry field from spec to metadata for services.Users and updated
expiry check to prefer metadata and fallback to spec if not found. Added
test coverage.
This issue updates #1986.
This is intial, experimental implementation that will
be updated with tests and edge cases prior to production 2.7.0 release.
Teleport proxy adds support for Kubernetes API protocol.
Auth server uses Kubernetes API to receive certificates
issued by Kubernetes CA.
Proxy intercepts and forwards API requests to the Kubernetes
API server and captures live session traffic, making
recordings available in the audit log.
Tsh login now updates kubeconfig configuration to use
Teleport as a proxy server.
This commit introduced mutual TLS authentication
for auth server API server.
Auth server multiplexes HTTP over SSH - existing
protocol and HTTP over TLS - new protocol
on the same listening socket.
Nodes and users authenticate with 2.5.0 Teleport
using TLS mutual TLS except backwards-compatibility
cases.
Lisa Kim