Fix old tag of custom error pages used in example (#7460)

* Fix old tag of custom error pages used in example

* Move nginx-errors to k8s registry

Since the setup for the custom-error-messages was really different from
the other images that are build using cloudbuild, I changed it to "fit
in better"

* Use Go version 1.17 for custom-error-pages

Since Go >= 1.16 required the use of modules, I also initialized the module using the name k8s.io/ingress-nginx/custom-error-pages
This commit is contained in:
Jennifer Kirsch 2021-09-09 13:38:11 +02:00 committed by GitHub
parent 7be4015e13
commit c9a00fbc73
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
8 changed files with 240 additions and 98 deletions

View file

@ -1,4 +1,4 @@
# Copyright 2017 The Kubernetes Authors. All rights reserved.
# Copyright 2021 The Kubernetes Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
@ -12,10 +12,23 @@
# See the License for the specific language governing permissions and
# limitations under the License.
FROM BASEIMAGE
FROM golang:1.17-alpine as builder
RUN apk add git
CROSS_BUILD_COPY qemu-QEMUARCH-static /usr/bin/
WORKDIR /go/src/k8s.io/ingress-nginx/images/custom-error-pages
COPY . /
COPY . .
CMD ["/custom-error-pages"]
RUN go get . && \
CGO_ENABLED=0 go build -a -installsuffix cgo \
-ldflags "-s -w" \
-o nginx-errors .
# Use distroless as minimal base image to package the binary
# Refer to https://github.com/GoogleContainerTools/distroless for more details
FROM gcr.io/distroless/static:nonroot
COPY --from=builder /go/src/k8s.io/ingress-nginx/images/custom-error-pages/nginx-errors /
USER nonroot:nonroot
CMD ["/nginx-errors"]

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@ -0,0 +1,17 @@
module k8s.io/ingress-nginx/custom-error-pages
go 1.17
require github.com/prometheus/client_golang v1.11.0
require (
github.com/beorn7/perks v1.0.1 // indirect
github.com/cespare/xxhash/v2 v2.1.1 // indirect
github.com/golang/protobuf v1.4.3 // indirect
github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
github.com/prometheus/client_model v0.2.0 // indirect
github.com/prometheus/common v0.26.0 // indirect
github.com/prometheus/procfs v0.6.0 // indirect
golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40 // indirect
google.golang.org/protobuf v1.26.0-rc.1 // indirect
)

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@ -0,0 +1,138 @@
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github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
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github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
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github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
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github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
github.com/json-iterator/go v1.1.11/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
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github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
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github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40 h1:JWgyZ1qgdTaF3N3oxC+MdTV7qvEEgHo3otj+HB5CM7Q=
golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.26.0-rc.1 h1:7QnIQpGRHE5RnLKnESfDoxm2dTapTZua5a0kS0A+VXQ=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

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@ -0,0 +1,184 @@
/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"fmt"
"io"
"log"
"mime"
"net/http"
"os"
"strconv"
"strings"
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
const (
// FormatHeader name of the header used to extract the format
FormatHeader = "X-Format"
// CodeHeader name of the header used as source of the HTTP status code to return
CodeHeader = "X-Code"
// ContentType name of the header that defines the format of the reply
ContentType = "Content-Type"
// OriginalURI name of the header with the original URL from NGINX
OriginalURI = "X-Original-URI"
// Namespace name of the header that contains information about the Ingress namespace
Namespace = "X-Namespace"
// IngressName name of the header that contains the matched Ingress
IngressName = "X-Ingress-Name"
// ServiceName name of the header that contains the matched Service in the Ingress
ServiceName = "X-Service-Name"
// ServicePort name of the header that contains the matched Service port in the Ingress
ServicePort = "X-Service-Port"
// RequestId is a unique ID that identifies the request - same as for backend service
RequestId = "X-Request-ID"
// ErrFilesPathVar is the name of the environment variable indicating
// the location on disk of files served by the handler.
ErrFilesPathVar = "ERROR_FILES_PATH"
// DefaultFormatVar is the name of the environment variable indicating
// the default error MIME type that should be returned if either the
// client does not specify an Accept header, or the Accept header provided
// cannot be mapped to a file extension.
DefaultFormatVar = "DEFAULT_RESPONSE_FORMAT"
)
func init() {
prometheus.MustRegister(requestCount)
prometheus.MustRegister(requestDuration)
}
func main() {
errFilesPath := "/www"
if os.Getenv(ErrFilesPathVar) != "" {
errFilesPath = os.Getenv(ErrFilesPathVar)
}
defaultFormat := "text/html"
if os.Getenv(DefaultFormatVar) != "" {
defaultFormat = os.Getenv(DefaultFormatVar)
}
http.HandleFunc("/", errorHandler(errFilesPath, defaultFormat))
http.Handle("/metrics", promhttp.Handler())
http.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
})
http.ListenAndServe(fmt.Sprintf(":8080"), nil)
}
func errorHandler(path, defaultFormat string) func(http.ResponseWriter, *http.Request) {
defaultExts, err := mime.ExtensionsByType(defaultFormat)
if err != nil || len(defaultExts) == 0 {
panic("couldn't get file extension for default format")
}
defaultExt := defaultExts[0]
return func(w http.ResponseWriter, r *http.Request) {
start := time.Now()
ext := defaultExt
if os.Getenv("DEBUG") != "" {
w.Header().Set(FormatHeader, r.Header.Get(FormatHeader))
w.Header().Set(CodeHeader, r.Header.Get(CodeHeader))
w.Header().Set(ContentType, r.Header.Get(ContentType))
w.Header().Set(OriginalURI, r.Header.Get(OriginalURI))
w.Header().Set(Namespace, r.Header.Get(Namespace))
w.Header().Set(IngressName, r.Header.Get(IngressName))
w.Header().Set(ServiceName, r.Header.Get(ServiceName))
w.Header().Set(ServicePort, r.Header.Get(ServicePort))
w.Header().Set(RequestId, r.Header.Get(RequestId))
}
format := r.Header.Get(FormatHeader)
if format == "" {
format = defaultFormat
log.Printf("format not specified. Using %v", format)
}
cext, err := mime.ExtensionsByType(format)
if err != nil {
log.Printf("unexpected error reading media type extension: %v. Using %v", err, ext)
format = defaultFormat
} else if len(cext) == 0 {
log.Printf("couldn't get media type extension. Using %v", ext)
} else {
ext = cext[0]
}
w.Header().Set(ContentType, format)
errCode := r.Header.Get(CodeHeader)
code, err := strconv.Atoi(errCode)
if err != nil {
code = 404
log.Printf("unexpected error reading return code: %v. Using %v", err, code)
}
w.WriteHeader(code)
if !strings.HasPrefix(ext, ".") {
ext = "." + ext
}
// special case for compatibility
if ext == ".htm" {
ext = ".html"
}
file := fmt.Sprintf("%v/%v%v", path, code, ext)
f, err := os.Open(file)
if err != nil {
log.Printf("unexpected error opening file: %v", err)
scode := strconv.Itoa(code)
file := fmt.Sprintf("%v/%cxx%v", path, scode[0], ext)
f, err := os.Open(file)
if err != nil {
log.Printf("unexpected error opening file: %v", err)
http.NotFound(w, r)
return
}
defer f.Close()
log.Printf("serving custom error response for code %v and format %v from file %v", code, format, file)
io.Copy(w, f)
return
}
defer f.Close()
log.Printf("serving custom error response for code %v and format %v from file %v", code, format, file)
io.Copy(w, f)
duration := time.Now().Sub(start).Seconds()
proto := strconv.Itoa(r.ProtoMajor)
proto = fmt.Sprintf("%s.%s", proto, strconv.Itoa(r.ProtoMinor))
requestCount.WithLabelValues(proto).Inc()
requestDuration.WithLabelValues(proto).Observe(duration)
}
}

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@ -0,0 +1,45 @@
/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// Collect and display prometheus metrics
package main
import (
"github.com/prometheus/client_golang/prometheus"
)
const (
namespace = "default_http_backend"
subsystem = "http"
)
var (
requestCount = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Subsystem: subsystem,
Name: "request_count_total",
Help: "Counter of HTTP requests made.",
}, []string{"proto"})
requestDuration = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: namespace,
Subsystem: subsystem,
Name: "request_duration_milliseconds",
Help: "Histogram of the time (in milliseconds) each request took.",
Buckets: append([]float64{.001, .003}, prometheus.DefBuckets...),
}, []string{"proto"})
)