flrichar

#!/usr/bin/perl

## extracts all ips from log file

while (<>) {
  chomp;
  if (/(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/) {
    print "$&\n";
  }
}

flrichar

---
- hosts: localhost
  name: show route-table facts via aws api
  ## proper creds belong in ~/.boto

  tasks:
    - name: all us-west-2 route-tables
      ec2_vpc_route_table_facts:
        region: us-west-2
        profile: default

flrichar

   - name: update facts with services; haproxy, docker, pdns, wireguard
     setup: filter='ansible_wg*'
     tags: ['services','wg']

   - name: add 172.31.0.0/16 route
     command: 'ip route add 172.31.0.0/16 via 172.28.254.105'
     when: ansible_wg0.active == true
     ignore_errors: yes
     tags: ['routes','wg']

flrichar

dvolume() {
  local volume volumes_to_list=${1:-$(docker volume ls --quiet)}
  for volume in $volumes_to_list; do
    sudo ls -lRa "$(docker volume inspect --format '{{ .Mountpoint }}' "$volume")"
    echo
  done
}

flrichar

 kubectl get pods --all-namespaces -o=json | jq -c '.items[] | {name: .metadata.name, namespace: .metadata.namespace, claimName: .spec |  select( has ("volumes") ).volumes[] | select( has ("persistentVolumeClaim") ).persistentVolumeClaim.claimName }'

### if needed, patch reclaim policy of pv for this pod ...
kubectl patch pv <the-pv-name> -p '{"spec":{"persistentVolumeReclaimPolicy":"Retain"}}'

flrichar

remove sub mgr repo
## subscription-manager repos --disable codeready-builder-for-rhel-8-x86_64-rpms

enabled elrepo for ml kernel updates
## yum --enablerepo=elrepo-kernel install kernel-ml

grubby disables selinux if needed // prob not as big a deal any longer
## grubby --update-kernel=ALL --args="selinux=0"

flrichar

---
## It's so nice when the kids get along

- hosts: localhost
  become: yes
  vars_files:
    - vars/become.yaml
  vars: 
    tfversion: 1.0.3 // look over there, elvis

flrichar

Grubby Options

Use Grubby to add or remove kernel parameters, and select the default kernel to boot into. Note, this is for primarily OpenSUSE and RHEL-like distros, Alma, Rocky etc.

• disable selinux: sudo grubby --update-kernel=ALL --args="selinux=0"
• list all kernels: sudo grubby --info ALL
• default kernel by name: sudo grubby --default-kernel, set default-kernel: sudo grubby --set-default-kernel="/boot/vmlinuz-xxxxxx"
• default kernel by index: sudo grubby --default-index, set default-index: sudo grubby --set-default-index=2

CGroups Kernel Parameters

• default cgroup version (legacy = v1, unified = v2) ... systemctl --version | awk '{print $NF}'

flrichar

### lab has two node groups, leap152 & bionics 

### fetch/install calicoctl of specific version on all nodes

---
- hosts: bionics,leap152
  become: yes
  vars_files:
    - ~/YAML/vars/become.yaml
  vars: 

flrichar

### grab nameTags privIP and IPv6 addrs 
aws ec2 describe-instances --profile=mongooseZ13 --region=ca-central-1 --query 'Reservations[].Instances[].[Tags[?Key==`Name`] | [0].Value, InstanceId, PrivateIpAddress, NetworkInterfaces[].Ipv6Addresses]' --output=text

# note I dont care about EIPs ... left that as an excercise for the reader