Linkerd - 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)