Merge pull request #3 from giannisalinetti/main

Add materials for chapters 9 and 10

Chapter09/example_sync.yaml

@@ -0,0 +1,19 @@
+docker.io: 
+  tls-verify: true 
+  images:  
+    alpine: [] 
+    nginx: 
+      - "latest" 
+  images-by-tag-regex: 
+    httpd: ^2\.4\.[0-9]*-alpine$ 
+quay.io: 
+  tls-verify: true 
+  images: 
+    fedora/fedora: 
+      - latest 
+registry.access.redhat.com: 
+  tls-verify: true 
+  images: 
+    ubi8: 
+      - "8.4" 
+      - "8.5"

Chapter09/kube_sync.yaml

@@ -0,0 +1,9 @@
+k8s.gcr.io: 
+  tls-verify: true 
+  images-by-tag-regex: 
+    kube-apiserver: ^v1\.22\..*
+    kube-controller-manager: ^v1\.22\..*
+    kube-proxy: ^v1\.22\..*
+    kube-scheduler: ^v1\.22\..*
+    coredns/coredns: ^v1\.8\..*
+    etcd: 3\.4.[0-9]*-[0-9]*

Chapter09/local_registry/customizations/config.yml

@@ -0,0 +1,27 @@
+version: 0.1
+log:
+  fields:
+    service: registry
+storage:
+  cache:
+    blobdescriptor: inmemory
+  filesystem:
+    rootdirectory: /var/lib/registry
+  delete:
+    enabled: true
+auth:
+  htpasswd:
+    realm: basic-realm
+    path: /var/lib/htpasswd
+http:
+  addr: :5000
+  headers:
+    X-Content-Type-Options: [nosniff]
+  tls:
+    certificate: /etc/pki/certs/tls.crt
+    key: /etc/pki/certs/tls.key
+health:
+  storagedriver:
+    enabled: true
+    interval: 10s
+    threshold: 3

Chapter09/local_registry/minimal_httpd/Containerfile

@@ -0,0 +1,5 @@
+FROM registry.access.redhat.com/ubi8:latest
+RUN dnf install -y httpd && dnf clean all -y  
+COPY index.html /var/www/html
+RUN dnf install -y git && dnf clean all -y  
+CMD ["/usr/sbin/httpd", "-DFOREGROUND"]

Chapter09/local_registry/minimal_httpd/index.html

@@ -0,0 +1 @@
+Hello World!

Chapter09/openshift_sync.yaml

@@ -0,0 +1,4 @@
+quay.io: 
+  tls-verify: true 
+  images-by-tag-regex: 
+    openshift-release-dev/ocp-release: ^4\.9\..*-x86_64$

Chapter10/FROM_auth_error/Dockerfile

@@ -0,0 +1,11 @@
+FROM local-registry.example.com/ubi8
+
+# Update image and install httpd
+RUN yum install -y httpd && yum clean all -y
+
+# Expose the default httpd port 80
+EXPOSE 80
+
+# Run the httpd
+CMD ["/usr/sbin/httpd", "-DFOREGROUND"]
+

Chapter10/FROM_repo_not_found/Dockerfile

@@ -0,0 +1,11 @@
+FROM registry.access.redhat.com/ubi_8
+
+# Update image and install httpd
+RUN yum install -y httpd && yum clean all -y
+
+# Expose the default httpd port 80
+EXPOSE 80
+
+# Run the httpd
+CMD ["/usr/sbin/httpd", "-DFOREGROUND"]
+

Chapter10/FROM_tag_not_found/Dockerfile

@@ -0,0 +1,11 @@
+FROM docker.io/library/fedora:sometag
+
+# Update image and install httpd
+RUN dnf install -y httpd && dnf clean all -y
+
+# Expose the default httpd port 80
+EXPOSE 80
+
+# Run the httpd
+CMD ["/usr/sbin/httpd", "-DFOREGROUND"]
+

Chapter10/RUN_command_error/Dockerfile

@@ -0,0 +1,11 @@
+FROM registry.access.redhat.com/ubi8
+
+# Update image and install httpd
+RUN yum install -y htpd && yum clean all -y
+
+# Expose the default httpd port 80
+EXPOSE 80
+
+# Run the httpd
+CMD ["/usr/sbin/httpd", "-DFOREGROUND"]
+

Chapter10/buildah_script_example/custom-httpd.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+set -euo pipefail
+
+# Trying to pull a non-existing tag of Fedora official image 
+container=$(buildah from docker.io/library/fedora:non-existing-tag)
+buildah run $container -- dnf install -y httpd; dnf clean all -y
+buildah config --cmd "httpd -DFOREGROUND" $container
+buildah config --port 80 $container
+buildah commit $container myhttpd
+buildah tag custom-httpd registry.example.com/custom-httpd:v0.0.1

Chapter10/students/Dockerfile

@@ -0,0 +1,24 @@
+FROM docker.io/library/golang AS builder
+
+# Copy files for build
+RUN mkdir -p /go/src/students/models
+COPY go.mod main.go /go/src/students
+COPY models/main.go /go/src/students/models
+
+# Set the working directory
+WORKDIR /go/src/students
+
+# Download dependencies
+RUN go get -d -v ./...
+
+# Install the package
+RUN go build -v 
+
+# Runtime image
+FROM registry.access.redhat.com/ubi8/ubi-minimal:latest as bin
+COPY --from=builder /go/src/students /usr/local/bin
+COPY entrypoint.sh /
+
+EXPOSE 8080
+
+ENTRYPOINT ["/entrypoint.sh"]

Chapter10/students/db.sql

@@ -0,0 +1,14 @@
+CREATE TABLE students (
+id integer NOT NULL,
+firstname char(256) NOT NULL,
+middlename char(256) NOT NULL,
+lastname char(256) NOT NULL,
+class char(128) NOT NULL,
+course char(128) NOT NULL);
+
+INSERT INTO students (id, firstname, middlename, lastname, class, course) VALUES
+('10149', 'Frank', 'Vincent', 'Zappa', '3A', 'Composition');
+
+ALTER TABLE students ADD PRIMARY KEY (id);
+
+

Chapter10/students/entrypoint.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -euo pipefail
+
+if [ $# -eq 0 ]; then
+	exec /usr/local/bin/students
+else
+	exec $@
+fi

Chapter10/students/go.mod

@@ -0,0 +1,5 @@
+module github.com/PacktPublishing/Podman-for-DevOps/Chapter10/students
+
+go 1.16
+
+require github.com/lib/pq v1.10.4 // indirect

Chapter10/students/go.sum

@@ -0,0 +1,2 @@
+github.com/lib/pq v1.10.4 h1:SO9z7FRPzA03QhHKJrH5BXA6HU1rS4V2nIVrrNC1iYk=
+github.com/lib/pq v1.10.4/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=

Chapter10/students/main.go

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+package main
+
+import (
+	"database/sql"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/PacktPublishing/Podman-for-DevOps/Chapter10/students/models"
+
+	_ "github.com/lib/pq"
+)
+
+func main() {
+
+	var (
+		username string
+		password string
+		host     string
+		port     string
+		database string
+		usage    string
+	)
+
+	flag.StringVar(&username, "username", "admin", "Default database username")
+	flag.StringVar(&password, "password", "password", "Default database password")
+	flag.StringVar(&host, "host", "localhost", "Default host running the database")
+	flag.StringVar(&port, "port", "5432", "Default database port")
+	flag.StringVar(&database, "database", "students", "Default application database")
+	flag.Usage = func() {
+		fmt.Fprintf(flag.CommandLine.Output(), usage, os.Args[0])
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+
+	connString := "postgres://" + username + ":" + password + "@" + host + ":" + port + "/" + database + "?sslmode=disable"
+	log.Printf("Connecting to host %s:%s, database %s", host, port, database)
+
+	var err error
+	models.DB, err = sql.Open("postgres", connString)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	http.HandleFunc("/students", getStudents)
+
+	if err := http.ListenAndServe(":8080", nil); err != nil {
+		log.Fatal(err)
+	}
+
+}
+
+// getStudents is a HTTP GET method to print a full list of the students in JSON encoding
+func getStudents(w http.ResponseWriter, r *http.Request) {
+	studentsInfo, err := models.GetStudents()
+	if err != nil {
+		http.Error(w, http.StatusText(500), 500)
+		return
+	}
+
+	for _, std := range studentsInfo {
+		s, err := json.Marshal(std)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Fprintf(w, "%s", string(s))
+	}
+}

Chapter10/students/models/main.go

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+package models
+
+import (
+	"database/sql"
+	"strings"
+)
+
+var DB *sql.DB
+
+type Student struct {
+	Id         int
+	FirstName  string
+	MiddleName string
+	LastName   string
+	Class      string
+	Course     string
+}
+
+func GetStudents() ([]Student, error) {
+	rows, err := DB.Query("SELECT * from students")
+	if err != nil {
+		return nil, err
+	}
+
+	defer rows.Close()
+
+	var students []Student
+
+	for rows.Next() {
+		var student Student
+		err := rows.Scan(&student.Id, &student.FirstName, &student.MiddleName, &student.LastName, &student.Class, &student.Course)
+		if err != nil {
+			return nil, err
+		}
+
+		// Trim uncessary spaces from string fields
+		student.FirstName = strings.TrimSpace(student.FirstName)
+		student.MiddleName = strings.TrimSpace(student.MiddleName)
+		student.LastName = strings.TrimSpace(student.LastName)
+		student.Class = strings.TrimSpace(student.Class)
+		student.Course = strings.TrimSpace(student.Course)
+
+		// Append the struct to the slice of students
+		students = append(students, student)
+	}
+
+	err = rows.Err()
+	if err != nil {
+		return nil, err
+	}
+
+	return students, nil
+}