markusthoemmes

Readiness probe optimization results

All of these measurements are taken on my local machine using kind. The usual disclaimers apply. YMMV.

Note: "Adjusted" means HEAD without startup probe on the queue-proxy but HTTP probe on user-container. The following patch is applied to podspeed

diff --git a/pkg/pod/types/knative.go b/pkg/pod/types/knative.go
index 59b2c8d..1aab20b 100644
--- a/pkg/pod/types/knative.go

markusthoemmes

func BenchmarkConnection(b *testing.B) {
	tests := []struct {
		proto string
		addr  string
	}{{
		proto: "unix",
		addr:  unixSocketPath,
	}, {
		proto: "tcp",
		addr:  ":8888",

markusthoemmes

package main

import (
	"fmt"
	"io"
	"io/ioutil"
	"math/rand"
	"net/http"
	"net/http/httptest"
	"net/http/httputil"

markusthoemmes

Knative Serving release v0.15.0

Meta

Serving release artifact deprecations

serving.yaml and serving-cert-manager.yaml will be shipped for the last time in this release. They have been broken out into separate artifacts. Please refer to the current installation docs for guidance on how to install Knative Serving and its optional components.

Minimum supported Kubernetes version bumped to 1.16

As per the Kubernetes minimum version principle - our current minimum supported Kubernetes version is now 1.16.

markusthoemmes

package main

import (
	"context"
	"fmt"
	"io/ioutil"
	"net"
	"net/http"
)

markusthoemmes

HTTPS Proxy testing with mitmproxy

Basic functionality test

1. Get a machine to run mitmproxy. Anything that can get an IP will work.
2. Download mitmproxy: wget https://snapshots.mitmproxy.org/5.0.1/mitmproxy-5.0.1-linux.tar.gz
3. Unpack: tar -xf mitmproxy-5.0.1-linux.tar.gz
4. Just run mitmproxy: ./mitmproxy --set block_global=false. Disabling block_global is important to allow any traffic.
5. Get the relevant certificate: cat ~/.mitmproxy/mitmproxy-ca-cert.pem
6. Try out it works: curl --proxy $IP:8080 --cacert mitmproxy-ca-cert.pem https://www.canihazip.com/s

markusthoemmes

kind: ConfigMap
apiVersion: v1
metadata:
  name: serverless-operator

data:
  customResourceDefinitions: |-
    - apiVersion: apiextensions.k8s.io/v1beta1
      kind: CustomResourceDefinition
      metadata:

markusthoemmes

Profiling Knative Serving

Knative Serving allows for collecting runtime profiling data expected by the pprof visualization tool. Profiling data is available for the autoscaler, activator, controller, webhook and for the queue-proxy container which is injected into the user application pod. When enabled Knative serves profiling data on the default port 8008 through a web server.

Steps to get profiling data:

markusthoemmes

apiVersion: v1
kind: Service
metadata:
  name: test-service
spec:
  ports:
  - port: 8080
    name: http
  selector:
    app: test

markusthoemmes

[user]
    name = Markus Thömmes
    email = markusthoemmes@me.com
[push]
    default = matching
[alias]
    pr = "!sh -c \"git fetch upstream pull/$1/head:pr-$1\" -"
    update-fork = "!sh -c \"git fetch upstream; git rebase upstream/master; git push origin master\" -"
[core]
    excludesfile = ~/.gitignore