Note

As with my first Docker course on Pluralsight, I wouldn't recommend using LXC containers for working with Docker. Instead, running Ubuntu 20.04 VMs within VirtualBox should give you the perfect base environment for this course. I included a video on working with VirtualBox in my Linux Server Virtualization course.

---

Contents:

A Simple Dockerfile
Many Line Dockerfile
One Line Dockerfile
Launch Docker Registry With Persistent Storage
Set Up User Authentication for a Docker Registry
webserver-config.yaml

---

A Simple Dockerfile

# Dockerfile contents: FROM ubuntu:20.04 ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Toronto" RUN apt-get update RUN apt-get install -y apache2 ADD index.html /var/www/html/ CMD /usr/sbin/apache2ctl -D FOREGROUND EXPOSE 80

---

Many Line Dockerfile

# dockerfile manyline: FROM ubuntu:16.04 RUN apt-get update && apt-get install -y curl RUN mkdir -p /opt/jboss/wildfly RUN cd /tmp RUN curl -O https://download.jboss.org/wildfly/10.1.0.Final/wildfly-10.1.0.Final.tar.gz RUN tar xf wildfly-10.1.0.Final.tar.gz RUN mv wildfly-10.1.0.Final /opt/jboss/wildfly RUN rm wildfly-10.1.0.Final.tar.gz

---

One Line Dockerfile

# dockerfile oneline: FROM ubuntu:16.04 RUN apt-get update && apt-get install -y curl RUN mkdir -p /opt/jboss/wildfly && cd /tmp && \ curl -O https://download.jboss.org/wildfly/10.1.0.Final/wildfly-10.1.0.Final.tar.gz \ && tar xf wildfly-10.1.0.Final.tar.gz \ && mv wildfly-10.1.0.Final /opt/jboss/wildfly \ && rm wildfly-10.1.0.Final.tar.gz

---

Launch Docker Registry With Persistent Storage

docker run -d \ -p 5000:5000 \ --restart always \ -v /var/images:/var/lib/registry \ registry:latest

---

Set Up User Authentication for a Docker Registry

docker run --entrypoint htpasswd \ registry:2.7.0 -Bbn dbclinton >> auth/htpasswd_file docker run -d -p 5000:5000 \ --restart=no \ --name registry \ -v `pwd`/auth:/auth \ -e "REGISTRY_AUTH=htpasswd" \ -e "REGISTRY_AUTH_HTPASSWD_REALM=.basic-realm" \ -e "REGISTRY_AUTH_HTPASSWD_PATH=/auth/htpasswd_file" \ -v /certs:/certs \ -e REGISTRY_HTTP_TLS_CERTIFICATE=/certs/domain.crt \ -e REGISTRY_HTTP_TLS_KEY=/certs/domain.key \ registry:2

---

webserver-config.yaml

apiVersion: apps/v1 kind: Deployment metadata: name: webserver spec: replicas: 1 selector: matchLabels: app: webserver template: metadata: labels: app: webserver spec: containers: - name: mywebserver image: dbclinton/webserver:latest imagePullSecrets: - name: regcred-1

---

Bootstrap IT