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jdob
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Merge branch 'master' of github.com:kubernetes-operators-book/chapters
2 parents 7f8c031 + 0a85e6b commit e71b11e

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+1435
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‎ch06/visitors-helm/templates/auth.yaml

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apiVersion: v1
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kind: Secret
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metadata:
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name: mysql-auth
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type: Opaque
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stringData:
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username: visitors-user
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password: visitors-pass

‎ch06/visitors-helm/templates/backend-deployment.yaml

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value: visitors
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- name: MYSQL_SERVICE_HOST
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value: mysql-service
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- name: MYSQL_USERNAME
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valueFrom:
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secretKeyRef:
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name: mysql-auth
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key: username
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- name: MYSQL_PASSWORD
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valueFrom:
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secretKeyRef:
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name: mysql-auth
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key: password

‎ch06/visitors-helm/templates/mysql-deployment.yaml

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- name: MYSQL_DATABASE
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value: visitors
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- name: MYSQL_USER
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value: visitors
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valueFrom:
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secretKeyRef:
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name: mysql-auth
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key: username
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- name: MYSQL_PASSWORD
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value: visitors
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valueFrom:
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secretKeyRef:
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name: mysql-auth
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key: password

‎ch07/visitors-operator/.gitignore

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# Temporary Build Files
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build/_output
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build/_test
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# Created by https://www.gitignore.io/api/go,vim,emacs,visualstudiocode
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### Emacs ###
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# -*- mode: gitignore; -*-
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*~
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\#*\#
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/.emacs.desktop
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/.emacs.desktop.lock
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*.elc
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auto-save-list
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tramp
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.\#*
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# Org-mode
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.org-id-locations
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*_archive
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# flymake-mode
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*_flymake.*
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# eshell files
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/eshell/history
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/eshell/lastdir
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# elpa packages
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/elpa/
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# reftex files
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*.rel
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# AUCTeX auto folder
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/auto/
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# cask packages
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.cask/
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dist/
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# Flycheck
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flycheck_*.el
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# server auth directory
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/server/
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# projectiles files
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.projectile
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projectile-bookmarks.eld
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# directory configuration
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.dir-locals.el
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# saveplace
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places
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# url cache
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url/cache/
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# cedet
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ede-projects.el
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# smex
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smex-items
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# company-statistics
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company-statistics-cache.el
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# anaconda-mode
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anaconda-mode/
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### Go ###
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# Binaries for programs and plugins
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*.exe
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*.exe~
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*.dll
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*.so
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*.dylib
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# Test binary, build with 'go test -c'
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*.test
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# Output of the go coverage tool, specifically when used with LiteIDE
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*.out
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### Vim ###
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# swap
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.sw[a-p]
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.*.sw[a-p]
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# session
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Session.vim
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# temporary
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.netrwhist
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# auto-generated tag files
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tags
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### VisualStudioCode ###
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.vscode/*
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.history
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# End of https://www.gitignore.io/api/go,vim,emacs,visualstudiocode

‎ch07/visitors-operator/build/Dockerfile

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FROM registry.access.redhat.com/ubi7/ubi-minimal:latest
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ENV OPERATOR=/usr/local/bin/visitors-operator \
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USER_UID=1001 \
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USER_NAME=visitors-operator
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# install operator binary
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COPY build/_output/bin/visitors-operator ${OPERATOR}
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COPY build/bin /usr/local/bin
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RUN /usr/local/bin/user_setup
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ENTRYPOINT ["/usr/local/bin/entrypoint"]
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USER ${USER_UID}

‎ch07/visitors-operator/build/bin/entrypoint

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#!/bin/sh -e
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# This is documented here:
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# https://docs.openshift.com/container-platform/3.11/creating_images/guidelines.html#openshift-specific-guidelines
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if ! whoami &>/dev/null; then
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if [ -w /etc/passwd ]; then
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echo "${USER_NAME:-visitors-operator}:x:$(id -u):$(id -g):${USER_NAME:-visitors-operator} user:${HOME}:/sbin/nologin" >> /etc/passwd
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fi
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fi
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exec ${OPERATOR} $@

‎ch07/visitors-operator/build/bin/user_setup

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#!/bin/sh
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set -x
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# ensure $HOME exists and is accessible by group 0 (we don't know what the runtime UID will be)
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mkdir -p ${HOME}
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chown ${USER_UID}:0 ${HOME}
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chmod ug+rwx ${HOME}
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# runtime user will need to be able to self-insert in /etc/passwd
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chmod g+rw /etc/passwd
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# no need for this script to remain in the image after running
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rm $0

‎ch07/visitors-operator/cmd/manager/main.go

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package main
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import (
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"context"
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"flag"
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"fmt"
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"os"
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"runtime"
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// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
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_ "k8s.io/client-go/plugin/pkg/client/auth"
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"github.com/jdob/visitors-operator/pkg/apis"
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"github.com/jdob/visitors-operator/pkg/controller"
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"github.com/operator-framework/operator-sdk/pkg/k8sutil"
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"github.com/operator-framework/operator-sdk/pkg/leader"
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"github.com/operator-framework/operator-sdk/pkg/log/zap"
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"github.com/operator-framework/operator-sdk/pkg/metrics"
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"github.com/operator-framework/operator-sdk/pkg/restmapper"
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sdkVersion "github.com/operator-framework/operator-sdk/version"
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"github.com/spf13/pflag"
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"sigs.k8s.io/controller-runtime/pkg/client/config"
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"sigs.k8s.io/controller-runtime/pkg/manager"
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logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
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"sigs.k8s.io/controller-runtime/pkg/runtime/signals"
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)
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// Change below variables to serve metrics on different host or port.
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var (
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metricsHost = "0.0.0.0"
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metricsPort int32 = 8383
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)
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var log = logf.Log.WithName("cmd")
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func printVersion() {
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log.Info(fmt.Sprintf("Go Version: %s", runtime.Version()))
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log.Info(fmt.Sprintf("Go OS/Arch: %s/%s", runtime.GOOS, runtime.GOARCH))
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log.Info(fmt.Sprintf("Version of operator-sdk: %v", sdkVersion.Version))
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}
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func main() {
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// Add the zap logger flag set to the CLI. The flag set must
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// be added before calling pflag.Parse().
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pflag.CommandLine.AddFlagSet(zap.FlagSet())
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// Add flags registered by imported packages (e.g. glog and
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// controller-runtime)
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pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
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pflag.Parse()
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// Use a zap logr.Logger implementation. If none of the zap
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// flags are configured (or if the zap flag set is not being
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// used), this defaults to a production zap logger.
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//
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// The logger instantiated here can be changed to any logger
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// implementing the logr.Logger interface. This logger will
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// be propagated through the whole operator, generating
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// uniform and structured logs.
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logf.SetLogger(zap.Logger())
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printVersion()
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namespace, err := k8sutil.GetWatchNamespace()
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if err != nil {
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log.Error(err, "Failed to get watch namespace")
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os.Exit(1)
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}
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// Get a config to talk to the apiserver
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cfg, err := config.GetConfig()
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if err != nil {
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log.Error(err, "")
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os.Exit(1)
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}
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ctx := context.TODO()
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// Become the leader before proceeding
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err = leader.Become(ctx, "visitors-operator-lock")
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if err != nil {
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log.Error(err, "")
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os.Exit(1)
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}
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// Create a new Cmd to provide shared dependencies and start components
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mgr, err := manager.New(cfg, manager.Options{
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Namespace: namespace,
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MapperProvider: restmapper.NewDynamicRESTMapper,
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MetricsBindAddress: fmt.Sprintf("%s:%d", metricsHost, metricsPort),
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})
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if err != nil {
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log.Error(err, "")
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os.Exit(1)
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}
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log.Info("Registering Components.")
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// Setup Scheme for all resources
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if err := apis.AddToScheme(mgr.GetScheme()); err != nil {
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log.Error(err, "")
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os.Exit(1)
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}
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// Setup all Controllers
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if err := controller.AddToManager(mgr); err != nil {
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log.Error(err, "")
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os.Exit(1)
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}
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// Create Service object to expose the metrics port.
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_, err = metrics.ExposeMetricsPort(ctx, metricsPort)
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if err != nil {
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log.Info(err.Error())
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}
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log.Info("Starting the Cmd.")
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// Start the Cmd
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if err := mgr.Start(signals.SetupSignalHandler()); err != nil {
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log.Error(err, "Manager exited non-zero")
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os.Exit(1)
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}
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}

‎ch07/visitors-operator/deploy/crds/example_v1_visitorsapp_cr.yaml

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apiVersion: example.com/v1
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kind: VisitorsApp
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metadata:
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name: ex
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spec:
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size: 1
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title: "Custom Dashboard Title"

‎ch07/visitors-operator/deploy/crds/example_v1_visitorsapp_crd.yaml

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apiVersion: apiextensions.k8s.io/v1beta1
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kind: CustomResourceDefinition
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metadata:
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name: visitorsapps.example.com
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spec:
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group: example.com
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names:
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kind: VisitorsApp
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listKind: VisitorsAppList
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plural: visitorsapps
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singular: visitorsapp
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scope: Namespaced
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subresources:
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status: {}
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validation:
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openAPIV3Schema:
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properties:
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apiVersion:
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description: 'APIVersion defines the versioned schema of this representation
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of an object. Servers should convert recognized schemas to the latest
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internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#resources'
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type: string
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kind:
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description: 'Kind is a string value representing the REST resource this
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object represents. Servers may infer this from the endpoint the client
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submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds'
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type: string
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metadata:
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type: object
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spec:
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type: object
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properties:
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size:
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type: integer
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title:
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type: string
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required:
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- size
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status:
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type: object
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properties:
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backendImage:
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type: string
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frontendImage:
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type: string
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version: v1
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versions:
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- name: v1
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served: true
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storage: true

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