Container Images

Lab setup data from the Pluralsight course on:

Managing Container Images

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A Simple Dockerfile

# Dockerfile contents:
FROM ubuntu:24.04
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 /bin/sh \
    -v /home/ubuntu/auth:/auth registry:2 \
    -c "apk add --no-cache apache2-utils \
    && htpasswd -Bbn your_username your_password \
    > /auth/htpasswd_file"

docker run -d -p 5000:5000 \
  --restart=no \
  --name registry1 \
  -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