stable-2.12.6

stable-2.12.6

This stable release backports a service mirror memory leak fix. The service
mirror previously had an issue where certain resources weren't cleaned up
properly resulting in a memory leak.

• Fixed a memory leak in the multicluster service mirror component (10746)

stable-2.14.0

stable-2.14.0

This release introduces direct pod-to-pod multicluster service mirroring. When
clusters are deployed on a flat network, Linkerd can export multicluster
services in a way where cross-cluster traffic does not need to go through the
gateway. This enhances multicluster authentication and can reduce the need for
provisioning public load balancers.

In addition, this release adds support for the
Gateway API HTTPRoute resource (in the
gateway.networking.k8s.io api group). This improves compatibility with other
tools that use these resources such as Flagger and
Argo Rollouts. The release also includes
a large number of features and improvements to HTTPRoute including the ability
to set timeouts and the ability to define consumer-namespace HTTPRoutes.

Finally, this release includes a number of bugfixes, performance improvements,
and other smaller additions.

Upgrade notes: Please see the
upgrade instructions.

• Multicluster
  • Remove namespace field from cluster scoped resources to fix pruning
  • Added -o json flag for the linkerd multicluster gateways command (thanks
    @hiteshwani29)
  • Introduced logFormat value to the multicluster Link Helm Chart (thanks
    @bunnybilou!)
  • Added leader-election capabilities to the service-mirror controller
  • Added high-availability (HA) mode for the multicluster service-mirror
  • Added a new remoteDiscoverySelector field to the multicluster Link CRD,
    which enables a service mirroring mode where the control plane
    performs discovery for the mirrored service from the remote cluster, rather
    than creating Endpoints for the mirrored service in the source cluster
• HTTPRoute
  • Fixed linkerd uninstall issue for HTTPRoute
  • Added support for gateway.networking.k8s.io HTTPRoutes in the policy
    controller
  • Added support for RequestHeaderModifier and RequestRedirect HTTP filters in
    outbound policy; filters may be added at the route or backend level
  • Added support for the ResponseHeaderModifier HTTPRoute filter
  • Added support for HTTPRoutes defined in the consumer namespace
  • Added support for HTTPRoute parent_refs that do not specify a port
• CRDs
  • Patched the MeshTLSAuthentication CRD to force providing at least one
    identity/identityRef
• Control Plane
  • Send Opaque protocol hint for opaque ports in destination controller
  • Replaced deprecated failure-domain.beta.kubernetes.io/zone labels in Helm
    charts with topology.kubernetes.io/zone labels (thanks @piyushsingariya!)
  • Replaced server_port_subscribers Destination controller gauge metric with
    server_port_subscribes and server_port_unsubscribes counter metrics
• Proxy
  • Handle Opaque protocol hints on endpoints
  • Added outbound_http_balancer_endpoints metric
  • Fixed missing route_ metrics for requests with ServiceProfiles
  • Fixed proxy startup failure when using the config.linkerd.io/admin-port
    annotation (thanks @jclegras!)
  • Added distinguishable version information to proxy logs and metrics
• CLI
  • The linkerd diagnostics policy command now displays outbound policy when
    the target resource is a Service
  • A fix for HA validation checks when Linkerd is installed with Helm. Thanks
    @mikutas!!
• Viz
  • Add the kubelet NetworkAuthentication back since it is used by the
    linkerd viz allow-scrapes subcommand.
  • Fixed the linkerd viz check command so that it will wait until the viz
    extension becomes ready
  • Fixed an issue where specifying a remote_write config would cause the
    Prometheus config to be invalid (thanks @hiteshwani29)
  • Improved validation of the --to and --from flags for the linkerd viz stat
    command (thanks @pranoyk)
  • Added -o jsonpath flag to linkerd viz tap to allow filtering output fields
    (thanks @hiteshwani29!)
  • Fixed a Grafana error caused by an incorrect datasource (thanks @albundy83!)
  • Fixed missing "Services" menu item in the Spanish localization for the
    linkerd-viz web dashboard (thanks @mclavel!)
• Extensions
  • Added missing label linkerd.io/extension to certain resources to ensure they
    pruned when appropriate (thanks @ClementRepo)
  • Added tolerations and nodeSelector support in extensions namespace-metadata
    Jobs (thanks @pssalman!)
• Init Containers
  • Added an option for disabling the network validator's security context for
    environments that provide their own
• CNI
  • Added --set flag to install-cni plugin (thanks @amit-62!)
  • Fixed missing resource-cni labels on linkerd-cni, this blocked the
    linkerd-cni pods from coming up when the injector was broken (thanks
    @migueleliasweb!)
• Build
  • Build improvements for multi-arch build artifacts. Thanks @MarkSRobinson!!

This release includes changes from a massive list of contributors! A special
thank-you to everyone who helped make this release possible:

• Amir Karimi @AMK9978
• Amit Kumar @amit-62
• Andre Marcelo-Tanner @kzap
• Andrew @andrew-gropyus
• Arnaud Beun @bunnybilou
• Clement @proxfly
• Dima @krabradosty
• Grégoire Bellon-Gervais @albundy83
• Harsh Soni @harsh020
• Jean-Charles Legras @jclegras
• Loong Dai @daixiang0
• Mark Robinson @MarkSRobinson
• Miguel Elias dos Santos @migueleliasweb
• Pranoy Kumar Kundu @pranoyk
• Ryan Hristovski @ryanhristovski
• Takumi Sue @mikutas
• Zakhar Bessarab @zekker6
• hiteshwani29 @hiteshwani29
• pheianox
• pssalman @pssalman

edge-23.8.3

edge-23.8.3

This is a release candidate for stable-2.14.0; we encourage you to help trying
it out!

This edge release contains a number of improvements over the multi-cluster
features introduced in the last edge release supporting flat networks. It also
hardens the containers security stance by removing write access to the root
filesystem.

• Enhanced linkerd multicluster link to allow clusters to be linked without a
  gateway (#11226)
• Added cluster store size gauge metric (#11256)
• Disabled local traffic policy for remote discovery (#11257)
• Fixed various innocuous multi-cluster warnings (#11251, #11246, #11253)
• Set readOnlyRootFilesystem: true in all the containers, as they don't
  require write permissions (#11221; fixes #11142) (thanks @mikutas!)

edge-23.8.2

edge-23.8.2

This edge release adds improvements to Linkerd's multi-cluster features as part
of the flat network support planned for Linkerd stable-2.14.0. In addition, it
fixes an issue (#10764) where warnings about an invalid metric were logged
frequently by the Destination controller.

• Added a new remoteDiscoverySelector field to the multicluster Link CRD,
  which enables a service mirroring mode where the control plane
  performs discovery for the mirrored service from the remote cluster, rather
  than creating Endpoints for the mirrored service in the source cluster
  (#11190, #11201, #11220, and #11224)
• Fixed missing "Services" menu item in the Spanish localization for the
  linkerd-viz web dashboard (#11229) (thanks @mclavel!)
• Replaced server_port_subscribers Destination controller gauge metric with
  server_port_subscribes and server_port_unsubscribes counter metrics
  (#11206; fixes #10764)
• Replaced deprecated failure-domain.beta.kubernetes.io/zone labels in Helm
  charts with topology.kubernetes.io/zone labels (#11148; fixes #11114)
  (thanks @piyushsingariya!)

stable-2.13.6

stable-2.13.6

This stable release fixes a regression introduced in stable-2.13.0 which
resulted in proxies shedding load too aggressively while under moderate request
load to a single service (#11055). In addition, it updates the base image for
the linkerd-cni initcontainer to resolve a CVE in libdb (#11196), fixes a
race condition in the Destination controller that could cause it to crash
(#11163), as well as fixing a number of other issues.

• Control Plane

  • Fixed a race condition in the destination controller that could cause it to
    panic (#11169; fixes #11163)
  • Improved the granularity of logging levels in the control plane (#11147)

• Proxy

  • Changed the default HTTP request queue capacities for the inbound and
    outbound proxies back to 10,000 requests (#11198; fixes #11055)

• CLI

  • Updated extension CLI commands to prefer the --registry flag over the
    LINKERD_DOCKER_REGISTRY environment variable, making the precedence more
    consistent (thanks @harsh020!) (see #11144)

• CNI

  • Updated linkerd-cni base image to resolve CVE-2019-8457 in libdb
    (#11196)
  • Changed the CNI plugin installer to always run in 'chained' mode; the plugin
    will now wait until another CNI plugin is installed before appending its
    configuration (#10849)
  • Removed hostNetwork: true from linkerd-cni Helm chart templates
    (#11158; fixes #11141) (thanks @abhijeetgauravm!)

• Multicluster

  • Fixed the linkerd multicluster check command failing in the presence of
    lots of mirrored services (#10764)

edge-23.8.1

edge-23.8.1

This edge release restores a proxy setting for it to shed load less aggressively
while under high load, which should result in lower error rates (see #11055). It
also removes the usage of host networking in the linkerd-cni extension.

• Changed the default HTTP request queue capacities for the inbound and outbound
  proxies back to 10,000 requests (see #11055 and #11198)
• Lifted need of using host networking in the linkerd-cni Daemonset (#11141)
  (thanks @abhijeetgauravm!)

edge-23.7.3

edge-23.7.3

This edge release improves Linkerd's support for HttpRoute by allowing
parent_ref ports to be optional, allowing HttpRoutes to be defined in a
consumer's namespace, and adding support for the ResponseHeaderModifier filter.
It also fixes a panic in the destination controller.

• Added an option for disabling the network validator's security context for
  environments that provide their own
• Added high-availability (HA) mode for the multicluster service-mirror
• Added support for HttpRoute parent_refs that do not specify a port
• Fixed a Grafana error caused by an incorrect datasource (thanks @albundy83!)
• Added support for HttpRoutes defined in the consumer namespace
• Improved the granularity of logging levels in the control plane
• Fixed a race condition in the destination controller that could cause it to
  panic
• Added support for the ResponseHeaderModifier HttpRoute filter
• Updated extension CLI commands to prefer the --register flag over the
  LINKERD_DOCKER_REGISTRY environment variable, making the precedence more
  consistent (thanks @harsh020!)

edge-23.7.2

edge-23.7.2

This edge release introduces support for HTTP filters configured through both
policy.linkerd.io and gateway.networking.k8s.io HTTPRoute resources.
Currently, RequestHeaderModifier and RequestRedirect HTTP filters are
supported. Additionally, this release fixes an issue with the linkerd-cni
chart.

• Added support for RequestHeaderModifier and RequestRedirect HTTP filters in
  outbound policy; filters may be added at the route or backend level
• Fixed missing resource-cni labels on linkerd-cni, this blocked the
  linkerd-cni pods from coming up when the injector was broken (thanks
  @migueleliasweb!)

edge-23.7.1

edge-23.7.1

This edge release adds support for the upstream gateway.networking.k8s.io
HTTPRoute resource (in addition to the policy.linkerd.io CRD installed by
Linkerd). Furthermore, it fixes a bug where the ingress-mode proxy would fail to
fall back to ServiceProfiles for destinations without HTTPRoutes.

• Added support for gateway.networking.k8s.io HTTPRoutes in the policy
  controller
• Added distinguishable version information to proxy logs and metrics
• Fixed incorrect handling of NotFound client policies in ingress-mode proxies

edge-23.6.3

edge-23.6.3

This edge release adds leader-election capabilities to the service-mirror
controller under the hood, as a precursor to HA mode in an upcoming release. It
also includes a linkerd viz tap improvement and a proxy startup bugfix, both
contributed by the community!

• Added leader-election capabilities to the service-mirror controller
• Added -o jsonpath flag to linkerd viz tap to allow filtering output fields
  (thanks @hiteshwani29!)
• Fixed proxy startup failure when using the config.linkerd.io/admin-port
  annotation (thanks @jclegras!)