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logs: remove deprecated klog flags

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This completes the deprecation of klog flags which are no longer supported.
klog itself continues to support them, but Kubernetes components don't. This
makes the command line interfaces simpler and reduces the attack surface
because less functionality is exposed.

For example, kube-controller-manager now has:

    Logs flags:

      --log-flush-frequency duration
                Maximum number of seconds between log flushes (default 5s)
      --log-json-info-buffer-size quantity
                [Alpha] In JSON format with split output streams, the info messages can be buffered for a while to increase performance. The default value of zero
                bytes disables buffering. The size can be specified as number of bytes (512), multiples of 1000 (1K), multiples of 1024 (2Ki), or powers of those (3M,
                4G, 5Mi, 6Gi). Enable the LoggingAlphaOptions feature gate to use this.
      --log-json-split-stream
                [Alpha] In JSON format, write error messages to stderr and info messages to stdout. The default is to write a single stream to stdout. Enable the
                LoggingAlphaOptions feature gate to use this.
      --logging-format string
                Sets the log format. Permitted formats: "json" (gated by LoggingBetaOptions), "text". (default "text")
  -v, --v Level
                number for the log level verbosity
      --vmodule pattern=N,...
                comma-separated list of pattern=N settings for file-filtered logging (only works for text log format)

    Misc flags:

      --kubeconfig string
                Path to kubeconfig file with authorization and master location information.
      --master string
                The address of the Kubernetes API server (overrides any value in kubeconfig).

    Global flags:

  -h, --help
                help for kube-controller-manager
      --version version[=true]
                Print version information and quit

For details see
https://github.com/kubernetes/enhancements/tree/master/keps/sig-instrumentation/2845-deprecate-klog-specific-flags-in-k8s-components
This commit is contained in:
Patrick Ohly
2022-08-30 11:52:00 +02:00
parent 41619ace15
commit 2f762e4788
6 changed files with 58 additions and 61 deletions
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1
vendor/modules.txt vendored
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@@ -2029,6 +2029,7 @@ k8s.io/component-base/logs
k8s.io/component-base/logs/api/v1
k8s.io/component-base/logs/json
k8s.io/component-base/logs/json/register
k8s.io/component-base/logs/klogflags
k8s.io/component-base/logs/logreduction
k8s.io/component-base/logs/testinit
k8s.io/component-base/metrics