cobusbernard

# Organising a meetup

## Day considerations
- Avoid the first Thursday of the Month
- If we host at Takealot, remember that they have Drinkalot on Thursday

## Sponsors
Sponsors to list:
- Venue
- Drinks

cobusbernard

// CDK Commands:
cdk init app --language typescript
npm i @aws-cdk/aws-ec2 @aws-cdk/aws-iam @aws-cdk/aws-s3-assets cdk-ec2-key-pair @aws-cdk/aws-s3 @aws-cdk/aws-sagemaker

Uncomment line 14 in bin/<your app>.ts:
   env: { account: process.env.CDK_DEFAULT_ACCOUNT, region: process.env.CDK_DEFAULT_REGION },
   
cdk bootstrap
cdk deploy 

cobusbernard

function get-tfstate() {
  if [ -z $1 ]; then
    echo "You must specify the environment!"
    return
  fi

  if [ -z $2 ]; then
    echo "You must specify the system!"
    return
  fi

cobusbernard

Keybase proof

I hereby claim:

• I am cobusbernard on github.
• I am cobus (https://keybase.io/cobus) on keybase.
• I have a public key whose fingerprint is 7613 BCD0 EF4B 6D32 0C58 AFF3 8656 F0F5 3A9D 5DF9

To claim this, I am signing this object:

cobusbernard

function packer-version() {
  if [ -z $1 ]; then
    echo "You must specify the version!"
    return
  fi
  echo "Switching to packer version $1"
  if [ ! -f /usr/local/Cellar/packer/$1/packer ]; then
    echo "New version of packer, downloading..."
    curl -S https://releases.hashicorp.com/packer/$1/packer_$1_darwin_amd64.zip > /tmp/packer_$1.zip \
      && cd /tmp \

cobusbernard

function tf-version() {
  if [ -z $1 ]; then
    echo "You must specify the version!"
    return
  fi
  echo "Switching to terraform version $1"
  if [ ! -f /usr/local/Cellar/terraform/$1/terraform ]; then
    echo "New version of terraform, downloading..."
    curl -S https://releases.hashicorp.com/terraform/$1/terraform_$1_darwin_amd64.zip > /tmp/tf_$1.zip \
      && cd /tmp \

cobusbernard

2016/09/07 21:52:56 [INFO] Terraform version: 0.7.3  0dd7c657d6d60d2e7392b66ae6f74fb84582cab9
2016/09/07 21:52:56 [INFO] CLI args: []string{"/usr/local/Cellar/terraform/0.7.3/terraform", "plan", "-var", "environment=staging", "-var-file=../env.staging.tfvars", "-var-file=_staging/environment.tfvars", "-out=_staging/proposed.plan"}
2016/09/07 21:52:56 [DEBUG] Detected home directory from env var: /Users/mindless
2016/09/07 21:52:56 [DEBUG] Detected home directory from env var: /Users/mindless
2016/09/07 21:52:56 [DEBUG] Attempting to open CLI config file: /Users/mindless/.terraformrc
2016/09/07 21:52:56 [DEBUG] File doesn't exist, but doesn't need to. Ignoring.
2016/09/07 21:52:56 [DEBUG] Detected home directory from env var: /Users/mindless
2016/09/07 21:52:56 [TRACE] Preserving existing state lineage "2bac8445-a087-48f1-bb42-96529b3d5a5b"
2016/09/07 21:52:56 [TRACE] Preserving existing state lineage "2bac8445-a087-48f1-bb42-96529b3d5a5b"
2016/09/07 21:52:57 [WARN] Ignoring AWS metadata API endpoint at defaul

cobusbernard

1) if you’re on (most modern distributions of) linux, forget that `route(1)` even exists (and throw `ifconfig` out in the same go) because it’s just absolutely frustrating. for probably 98% of what you need, `ip(1)` is the cool you care about
generally speaking, these will cover you: `ip route`, `ip address`, `ip link`
2) when dealing with routing problems (​*even if just two hosts next to each other*​), `mtr` > `traceroute` > `ping` is an order that’s useful for a lot of what you need
mtr is nice because you can just let it keep running. press `d` in its display to get a running history breakdown of packets. fantastic for intermittent issues!
traceroute is generally known already, but depending on the complexity of your networks in question you may want `traceroute-nanog` or similar other ones. some of these are ASN-aware, which is useful.
in the same breath as traceroute, something else that’s useful to know about is `tracepath`
it’s a little bit nicer on finding asymm paths
lastly, `ping` ​*is*​ still usef

cobusbernard

docker inspect -f='{{range .Config.Env}}{{println .}}{{end}}' b70992b3b65c

docker-compose -f ~ec2-user/docker-compose.yml kill && docker-compose -f ~ec2-user/docker-compose.yml rm --force && docker-compose -f ~ec2-user/docker-compose.yml up -d

cobusbernard

# https://github.com/spotify/docker-gc

docker rm -v $(docker ps -a -q -f status=exited)

docker rmi $(docker images -f "dangling=true" -q)

docker run -v /var/run/docker.sock:/var/run/docker.sock -v /var/lib/docker:/var/lib/docker --rm martin/docker-cleanup-volumes