linkerd/linkerd2 stable-2.13.6

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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)