mkdir ca certs private
openssl genrsa -out ca/ca.key.pem 2048
openssl req -x509 -new -nodes -key ca/ca.key.pem -sha256 -days 3650 -out ca/ca.crt.pem -subj "/CN=IPsec Test CA/O=MyOrg/OU=MyUnit/L=MyCity/ST=MyState/C=US"
openssl genrsa -out private/hosts.key.pem 2048

cat > openssl.cnf <<EOF
[ req ]
distinguished_name = req_distinguished_name
req_extensions = v3_req
prompt = no

[ req_distinguished_name ]
C = US
ST = MyState
L = MyCity
O = MyOrg
OU = MyUnit
CN = worker-n.example.com

[ v3_req ]
basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
extendedKeyUsage = serverAuth, clientAuth
subjectAltName = @alt_names

[ alt_names ]
DNS.1 = worker-n.example.com #CHANGEME
DNS.2 = rhel-remote.example.com #CHANGEME
EOF

openssl req -new -key private/hosts.key.pem -out certs/hosts.csr.pem -config openssl.cnf

openssl x509 -req -in certs/hosts.csr.pem -CA ca/ca.crt.pem -CAkey ca/ca.key.pem -CAcreateserial -out certs/hosts.crt.pem -days 365 -sha256 -extfile <(printf "subjectAltName=DNS:openshift-host.example.com,DNS:rhel-host.example.com")


openssl pkcs12 -export -out certs/hosts.p12 -inkey private/hosts.key.pem -in certs/hosts.crt.pem -certfile ca/ca.crt.pem -name "allnodes"

cat > /etc/ipsec.d/poc.conf << EOF
conn my-host-to-host-vpn
    left=10.8.109.144 #  CAHNGEME This is the RHEL node IP
    leftid=%fromcert
    leftcert="allnodes"    
    right=10.8.51.222 # CHANGEME This is the OCP node IP
    rightid=%fromcert
    authby=rsasig              
    ikev2=yes
    ike=aes256-sha2      
    ikelifetime=8h                     
    esp=aes_gcm256
    auto=start                  
    type=transport 
EOF

cat > ipsec_nncp.yaml << EOF
apiVersion: nmstate.io/v1
kind: NodeNetworkConfigurationPolicy
metadata:
  name: ipsec-config
spec:
  nodeSelector:
    kubernetes.io/hostname: mmayeras-tqhkk-worker-0-b4ktk
  desiredState:
    interfaces:
    - name: test-ipsec
      type: ipsec
      libreswan:
        left: worker-n.example.com # CHANGEME
        leftid: '%fromcert'
        leftrsasigkey: '%cert'
        leftcert: left_server
        leftmodecfgclient: false
        right: rhel-host.example.com # CHANGEME
        rightid: '%fromcert'
        rightrsasigkey: '%cert'
        rightsubnet: 10.x.x.x/xx # CHANGEME
        ikev2: insist
        type: transport
        esp: aes_gcm256
        ike: aes256-sha2;dh20
EOF

oc apply -f ipsec_nncp.yaml 

cat > 99-ipsec-worker-endpoint-config.bu << EOF
  variant: openshift
  version: 4.18.0
  metadata:
    name: 99-worker-import-certs
    labels:
      machineconfiguration.openshift.io/role: worker
  systemd:
    units:
    - name: ipsec-import.service
      enabled: true
      contents: |
        [Unit]
        Description=Import external certs into ipsec NSS
        Before=ipsec.service

        [Service]
        Type=oneshot
        ExecStart=/usr/local/bin/ipsec-addcert.sh
        RemainAfterExit=false
        StandardOutput=journal

        [Install]
        WantedBy=multi-user.target
  storage:
    files:
    - path: /etc/pki/certs/ca.pem
      mode: 0400
      overwrite: true
      contents:
        local: ca/ca.crt.pem
    - path: /etc/pki/certs/hosts.p12
      mode: 0400
      overwrite: true
      contents:
        local: certs/hosts.p12
    - path: /usr/local/bin/ipsec-addcert.sh
      mode: 0740
      overwrite: true
      contents:
        inline: |
          #!/bin/bash -e
          echo "importing cert to NSS"
          certutil -A -n "CA" -t "CT,C,C" -d /var/lib/ipsec/nss/ -i /etc/pki/certs/ca.pem
          pk12util -W "" -i /etc/pki/certs/hosts.p12 -d /var/lib/ipsec/nss/
          certutil -M -n "allnodes" -t "u,u,u" -d /var/lib/ipsec/nss/
EOF

butane -d . 99-ipsec-worker-endpoint-config.bu -o ./99-ipsec-worker-endpoint-config.yaml

oc apply -f 

#!/bin/bash

set -e

USE_SSH=false
DRAINMODE=""

while getopts ":sd:" opt; do
  case ${opt} in
    s )
      USE_SSH=true
      echo "SSH mode enabled."
      ;;
    d )
      DRAINMODE=$OPTARG
      echo "Drain mode set to: $DRAINMODE"
      ;;
    \? )
      echo "Invalid option: $OPTARG" 1>&2
      echo "Usage: $0 [-s] [-d DRAINMODE]"
      echo "  -s    Use SSH to reboot nodes instead of oc debug"
      echo "  -d    Set drain mode options (e.g., --ignore-daemonsets --delete-emptydir-data --force --disable-eviction)"
      exit 1
      ;;
  esac
done

drain_node() {
    local node=$1
    echo "Draining node: $node with options: $DRAINMODE"
    #oc adm drain $node $DRAINMODE
}

reboot_node() {
    echo $USE_SSH
    local node=$1
    if $USE_SSH; then
        echo "Rebooting node using SSH: $node"
        #ssh core@$node sudo reboot
    else
        echo "Rebooting node using oc debug: $node"
        #oc debug node/$node -- chroot /host reboot
    fi
}

is_node_ready() {
    local node=$1
    oc get node $node --no-headers | awk '{print $2}'
}

nodes=$(oc get nodes -o jsonpath='{.items[*].metadata.name}')

for node in $nodes; do
    echo "Processing node: $node"

    drain_node $node

    reboot_node $node

    echo "Waiting for node $node to be ready..."
    while [[ $(is_node_ready $node) != "Ready" ]]; do
        sleep 30
    done

    echo "Node $node is ready. Proceeding with the next node..."
done

echo "All nodes have been successfully restarted."