Kubernetes: Building Kuard for Raspberry Pi (microk8s / ARM64)

 

In one of my last posts (click here) i used KUARD (kubernetes up and running demo) to check the livenessProbes of kubernetes.

In my posting i pulled the image from gcr.io/kuar-demo/kuard-arm64:3.

But what about building this image on myself?

First step: get the sources:

git clone https://github.com/kubernetes-up-and-running/kuard.git

Second step: run docker build:

cd kuard/
docker build . -t kuard:localbuild

But this fails with:

Step 13/14 : COPY --from=build /go/bin/kuard /kuard
COPY failed: stat /var/lib/docker/overlay2/60ba596c03e23fdfbca2216f495504fa2533a2f2e8cadd81a764a200c271de86/merged/go/bin/kuard: no such file or directory

What is going wrong here?

Inside the Dockerfile(s) there is ARCH=amd64

Just correct that with "sed -i 's/amd/arm/g' Dockerfile*"

After that the image is built without any problem:

Sending build context to Docker daemon  3.379MB
Step 1/14 : FROM golang:1.12-alpine AS build
 ---> 9d993b748f32
Step 2/14 : RUN apk update && apk upgrade && apk add --no-cache git nodejs bash npm
 ---> Using cache
 ---> 54400a0a06c5
Step 3/14 : RUN go get -u github.com/jteeuwen/go-bindata/...
 ---> Using cache
 ---> afe4c54a86c3
Step 4/14 : WORKDIR /go/src/github.com/kubernetes-up-and-running/kuard
 ---> Using cache
 ---> a51084750556
Step 5/14 : COPY . .
 ---> 568ef8c90354
Step 6/14 : ENV VERBOSE=0
 ---> Running in 0b7100c53ab0
Removing intermediate container 0b7100c53ab0
 ---> f22683c1c167
Step 7/14 : ENV PKG=github.com/kubernetes-up-and-running/kuard
 ---> Running in 8a0f880ea2ca
Removing intermediate container 8a0f880ea2ca
 ---> 49374a5b3802
Step 8/14 : ENV ARCH=arm64
 ---> Running in c6a08b2057d0
Removing intermediate container c6a08b2057d0
 ---> dd871e379a96
Step 9/14 : ENV VERSION=test
 ---> Running in 07e7c373ece7
Removing intermediate container 07e7c373ece7
 ---> 9dabd61d9cd0
Step 10/14 : RUN build/build.sh
 ---> Running in 66471550192c
Verbose: 0

> webpack-cli@3.2.1 postinstall /go/src/github.com/kubernetes-up-and-running/kuard/client/node_modules/webpack-cli
> lightercollective


     *** Thank you for using webpack-cli! ***

Please consider donating to our open collective
     to help us maintain this package.

  https://opencollective.com/webpack/donate

                    ***

added 819 packages from 505 contributors and audited 887 packages in 86.018s
found 683 vulnerabilities (428 low, 4 moderate, 251 high)
  run `npm audit fix` to fix them, or `npm audit` for details

> client@1.0.0 build /go/src/github.com/kubernetes-up-and-running/kuard/client
> webpack --mode=production

Browserslist: caniuse-lite is outdated. Please run next command `npm update caniuse-lite browserslist`
Hash: 52ca742bfd1307531486
Version: webpack 4.28.4
Time: 39644ms
Built at: 02/05/2021 6:48:35 PM
    Asset     Size  Chunks                    Chunk Names
bundle.js  333 KiB       0  [emitted]  [big]  main
Entrypoint main [big] = bundle.js
 [26] (webpack)/buildin/global.js 472 bytes {0} [built]
[228] (webpack)/buildin/module.js 497 bytes {0} [built]
[236] (webpack)/buildin/amd-options.js 80 bytes {0} [built]
[252] ./src/index.jsx + 12 modules 57.6 KiB {0} [built]
      | ./src/index.jsx 285 bytes [built]
      | ./src/app.jsx 7.79 KiB [built]
      | ./src/env.jsx 5.42 KiB [built]
      | ./src/mem.jsx 5.81 KiB [built]
      | ./src/probe.jsx 7.64 KiB [built]
      | ./src/dns.jsx 5.1 KiB [built]
      | ./src/keygen.jsx 7.69 KiB [built]
      | ./src/request.jsx 3.01 KiB [built]
      | ./src/highlightlink.jsx 1.37 KiB [built]
      | ./src/disconnected.jsx 3.6 KiB [built]
      | ./src/memq.jsx 6.33 KiB [built]
      | ./src/fetcherror.js 122 bytes [built]
      | ./src/markdown.jsx 3.46 KiB [built]
    + 249 hidden modules
go: finding github.com/prometheus/client_golang v0.9.2
go: finding github.com/spf13/pflag v1.0.3
go: finding github.com/miekg/dns v1.1.6
go: finding github.com/pkg/errors v0.8.1
go: finding github.com/elazarl/go-bindata-assetfs v1.0.0
go: finding github.com/BurntSushi/toml v0.3.1
go: finding github.com/felixge/httpsnoop v1.0.0
go: finding github.com/julienschmidt/httprouter v1.2.0
go: finding github.com/dustin/go-humanize v1.0.0
go: finding golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a
go: finding github.com/spf13/viper v1.3.2
go: finding github.com/prometheus/common v0.0.0-20181126121408-4724e9255275
go: finding github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a
go: finding github.com/matttproud/golang_protobuf_extensions v1.0.1
go: finding github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973
go: finding github.com/golang/protobuf v1.2.0
go: finding github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910
go: finding golang.org/x/sync v0.0.0-20181108010431-42b317875d0f
go: finding golang.org/x/net v0.0.0-20181201002055-351d144fa1fc
go: finding golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a
go: finding github.com/hashicorp/hcl v1.0.0
go: finding github.com/spf13/afero v1.1.2
go: finding github.com/coreos/go-semver v0.2.0
go: finding golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9
go: finding github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8
go: finding github.com/fsnotify/fsnotify v1.4.7
go: finding github.com/spf13/jwalterweatherman v1.0.0
go: finding github.com/coreos/etcd v3.3.10+incompatible
go: finding gopkg.in/yaml.v2 v2.2.2
go: finding golang.org/x/text v0.3.0
go: finding github.com/pelletier/go-toml v1.2.0
go: finding github.com/magiconair/properties v1.8.0
go: finding github.com/mitchellh/mapstructure v1.1.2
go: finding github.com/stretchr/testify v1.2.2
go: finding github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6
go: finding golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a
go: finding github.com/coreos/go-etcd v2.0.0+incompatible
go: finding github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77
go: finding github.com/spf13/cast v1.3.0
go: finding github.com/davecgh/go-spew v1.1.1
go: finding gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405
go: finding github.com/pmezard/go-difflib v1.0.0
go: downloading github.com/julienschmidt/httprouter v1.2.0
go: downloading github.com/pkg/errors v0.8.1
go: downloading github.com/miekg/dns v1.1.6
go: downloading github.com/spf13/viper v1.3.2
go: downloading github.com/felixge/httpsnoop v1.0.0
go: downloading github.com/spf13/pflag v1.0.3
go: downloading github.com/prometheus/client_golang v0.9.2
go: extracting github.com/pkg/errors v0.8.1
go: extracting github.com/julienschmidt/httprouter v1.2.0
go: extracting github.com/felixge/httpsnoop v1.0.0
go: extracting github.com/spf13/viper v1.3.2
go: downloading github.com/elazarl/go-bindata-assetfs v1.0.0
go: extracting github.com/elazarl/go-bindata-assetfs v1.0.0
go: extracting github.com/spf13/pflag v1.0.3
go: downloading gopkg.in/yaml.v2 v2.2.2
go: downloading github.com/dustin/go-humanize v1.0.0
go: extracting github.com/miekg/dns v1.1.6
go: downloading github.com/fsnotify/fsnotify v1.4.7
go: downloading github.com/hashicorp/hcl v1.0.0
go: extracting github.com/dustin/go-humanize v1.0.0
go: downloading github.com/magiconair/properties v1.8.0
go: downloading github.com/spf13/afero v1.1.2
go: extracting github.com/fsnotify/fsnotify v1.4.7
go: downloading golang.org/x/net v0.0.0-20181201002055-351d144fa1fc
go: downloading github.com/spf13/jwalterweatherman v1.0.0
go: downloading github.com/spf13/cast v1.3.0
go: extracting github.com/spf13/jwalterweatherman v1.0.0
go: extracting gopkg.in/yaml.v2 v2.2.2
go: extracting github.com/spf13/afero v1.1.2
go: extracting github.com/magiconair/properties v1.8.0
go: extracting github.com/prometheus/client_golang v0.9.2
go: downloading github.com/mitchellh/mapstructure v1.1.2
go: extracting github.com/spf13/cast v1.3.0
go: downloading golang.org/x/text v0.3.0
go: downloading golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a
go: extracting github.com/mitchellh/mapstructure v1.1.2
go: extracting github.com/hashicorp/hcl v1.0.0
go: downloading github.com/pelletier/go-toml v1.2.0
go: downloading golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a
go: downloading github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a
go: downloading github.com/prometheus/common v0.0.0-20181126121408-4724e9255275
go: extracting github.com/pelletier/go-toml v1.2.0
go: downloading github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910
go: extracting github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a
go: extracting github.com/prometheus/common v0.0.0-20181126121408-4724e9255275
go: downloading github.com/golang/protobuf v1.2.0
go: downloading github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973
go: extracting github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910
go: extracting github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973
go: downloading github.com/matttproud/golang_protobuf_extensions v1.0.1
go: extracting github.com/matttproud/golang_protobuf_extensions v1.0.1
go: extracting github.com/golang/protobuf v1.2.0
go: extracting golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a
go: extracting golang.org/x/net v0.0.0-20181201002055-351d144fa1fc
go: extracting golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a
go: extracting golang.org/x/text v0.3.0
Removing intermediate container 66471550192c
 ---> 236f3050bc93
Step 11/14 : FROM alpine
 ---> 1fca6fe4a1ec
Step 12/14 : USER nobody:nobody
 ---> Using cache
 ---> cabde1f6b77c
Step 13/14 : COPY --from=build /go/bin/kuard /kuard
 ---> 39e8b0af8cef
Step 14/14 : CMD [ "/kuard" ]
 ---> Running in ca867aeb43ba
Removing intermediate container ca867aeb43ba
 ---> e1cb3fd58eb4
Successfully built e1cb3fd58eb4
Successfully tagged kuard:localbuild