rkuzsma

#!/bin/bash
# Add (or replace) an entry called "dockermachine" in /etc/hosts that points to
# your local "docker-machine ip" so you can use http://dockermachine/
eval $(docker-machine env)
readonly DOCKER_HOST_NAME="dockermachine"
readonly HOSTS_FILE="/etc/hosts"
readonly TMPFILE=$(mktemp)
readonly DOCKER_HOST_IP=$(docker-machine ip)
readonly DOCKER_HOST_ENTRY="$DOCKER_HOST_IP $DOCKER_HOST_NAME"
echo "Adding '$DOCKER_HOST_IP $DOCKER_HOST_NAME' entry to '$HOSTS_FILE' so you can use http://$DOCKER_HOST_NAME URLs for testing"

rkuzsma

Step by step how to pull a private DockerHub hosted image in a Kubernetes YML.

export DOCKER_REGISTRY_SERVER=https://index.docker.io/v1/
export DOCKER_USER=Type your dockerhub username, same as when you `docker login`
export DOCKER_EMAIL=Type your dockerhub email, same as when you `docker login`
export DOCKER_PASSWORD=Type your dockerhub pw, same as when you `docker login`

kubectl create secret docker-registry myregistrykey \
  --docker-server=$DOCKER_REGISTRY_SERVER \
  --docker-username=$DOCKER_USER \

rkuzsma

How to configure Bash Completion on Mac for Docker and Docker-Compose

Copied from the official Docker-for-mac documentation (thanks Brett for the updated doc pointer):

Install shell completion

Docker Desktop for Mac comes with scripts to enable completion for the docker, docker-machine, and docker-compose commands. The completion scripts may be found inside Docker.app, in the Contents/Resources/etc/ directory and can be installed both in Bash and Zsh.

Bash

Bash has built-in support for completion To activate completion for Docker commands, these files need to be copied or symlinked to your bash_completion.d/ directory. For example, if you installed bash via Homebrew:

rkuzsma

public class DockerCompose {
  private final File dockerSrc;
  private final Logger logger = LoggerFactory.getLogger(this.getClass());
  public DockerCompose(String dockerSrcDir) {
    dockerSrc = new File(dockerSrcDir);
    if (!dockerSrc.exists()) {
      throw new RuntimeException("Docker source path does not exist: " + dockerSrcDir);
    }
    logger.info("Docker source path: " + dockerSrc.getAbsolutePath());
  }

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/**
 * General utilities to wait for ports and URL responses to be available.
 * Especially useful when waiting for container services to be fully "up".
 */
public class WaitFor {

  private static final Logger logger = LoggerFactory.getLogger(WaitFor.class.getClass());

  public static void waitForPort(String hostname, int port, long timeoutMs) {
    logger.info("Waiting for port " + port);

rkuzsma

Store the secrets on a local machine:

mkdir -p ~/.secrets
touch ~/.secrets/my_secrets
chmod 600 ~/.secrets/my_secrets
cat << EOF | gpg -c -o ~/.secrets/my_secrets
export SOME_SECRET_VARIABLE=some value
export ANOTHER_SECRET_VARIABLE=another value
EOF

rkuzsma

#!/bin/bash
kubectl get nodes --selector=kubernetes.io/role!=master -o jsonpath={.items[*].status.addresses[?\(@.type==\"ExternalIP\"\)].address}

rkuzsma

FROM openjdk:8

# Download jamvm from source and apply this patch to src/classlib/openjdk/natives.c:
# https://sourceforge.net/u/tdaitx/jamvm/ci/f342a84116edfe28ab75ebfa17fcf929bafb02c1/tree/src/classlib/openjdk/natives.c?diff=236f9d849cf52faeb150a6cd5ba6fbeb61bd2f1f

RUN apt-get update -qq && apt-get install -y \
  vim build-essential zlib1g-dev \
  openjdk-8-jre-jamvm libtool autoconf automake
  
RUN git clone https://git.code.sf.net/p/jamvm/code jamvm-code

rkuzsma

# The sed expression is intended to replace this:
# %CPU %MEM COMMAND
#  0.0  0.1 some really really really long process args
# with this:
# %CPU %MEM COMMAND
#  0.0  0.1 some reall...ocess args
# In the sed regex:
#  [^[:space:]]*  means "a sequence non-whitespace characters"
#  \s*  means "a sequence of whitespace characters"
# The sed regex matches the first and last 10 characters of the process args,

rkuzsma

# Created under Apache 2.0 License.
# Author: Rich Kuzsma
# Date: July 23, 2017

# Convert time duration strings like "10s" into milliseconds
module TimeUnit
  UNITS_IN_MS = {
    'd' => 86_400_000,
    'h' => 3_600_000,
    'm' => 60_000,