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configure.sh
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configure.sh
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#!/usr/bin/env bash
set -o errexit
set -o pipefail
# shellcheck disable=SC2155
export PROJECT_DIR=$(git rev-parse --show-toplevel)
# shellcheck disable=SC2155
export SOPS_AGE_KEY_FILE=~/.config/sops/age/keys.txt
# shellcheck disable=SC1091
source "${PROJECT_DIR}/.config.env"
show_help() {
cat << EOF
Usage: $(basename "$0") <options>
-h, --help Display help
--verify Verify .config.env settings
EOF
}
main() {
local verify=
parse_command_line "$@"
verify_binaries
if [[ "${verify}" == 1 ]]; then
verify_ansible_hosts
verify_metallb
verify_kubevip
verify_age
verify_git_repository
verify_cloudflare
success
else
# sops configuration file
envsubst < "${PROJECT_DIR}/tmpl/.sops.yaml" \
> "${PROJECT_DIR}/.sops.yaml"
# cluster
envsubst < "${PROJECT_DIR}/tmpl/cluster/cluster-settings.yaml" \
> "${PROJECT_DIR}/cluster/base/cluster-settings.yaml"
envsubst < "${PROJECT_DIR}/tmpl/cluster/gotk-sync.yaml" \
> "${PROJECT_DIR}/cluster/base/flux-system/gotk-sync.yaml"
envsubst < "${PROJECT_DIR}/tmpl/cluster/kube-vip-daemonset.yaml" \
> "${PROJECT_DIR}/cluster/core/kube-system/kube-vip/daemon-set.yaml"
envsubst < "${PROJECT_DIR}/tmpl/cluster/cluster-secrets.sops.yaml" \
> "${PROJECT_DIR}/cluster/base/cluster-secrets.sops.yaml"
envsubst < "${PROJECT_DIR}/tmpl/cluster/cert-manager-secret.sops.yaml" \
> "${PROJECT_DIR}/cluster/core/cert-manager/secret.sops.yaml"
envsubst < "${PROJECT_DIR}/tmpl/cluster/cloudflare-ddns-secret.sops.yaml" \
> "${PROJECT_DIR}/cluster/apps/networking/cloudflare-ddns/secret.sops.yaml"
sops --encrypt --in-place "${PROJECT_DIR}/cluster/base/cluster-secrets.sops.yaml"
sops --encrypt --in-place "${PROJECT_DIR}/cluster/core/cert-manager/secret.sops.yaml"
sops --encrypt --in-place "${PROJECT_DIR}/cluster/apps/networking/cloudflare-ddns/secret.sops.yaml"
# terraform
envsubst < "${PROJECT_DIR}/tmpl/terraform/secret.sops.yaml" \
> "${PROJECT_DIR}/provision/terraform/cloudflare/secret.sops.yaml"
sops --encrypt --in-place "${PROJECT_DIR}/provision/terraform/cloudflare/secret.sops.yaml"
# ansible
envsubst < "${PROJECT_DIR}/tmpl/ansible/kube-vip.yml" \
> "${PROJECT_DIR}/provision/ansible/inventory/group_vars/kubernetes/kube-vip.yml"
generate_ansible_hosts
generate_ansible_host_secrets
fi
}
parse_command_line() {
while :; do
case "${1:-}" in
-h|--help)
show_help
exit
;;
--verify)
verify=1
;;
*)
break
;;
esac
shift
done
if [[ -z "$verify" ]]; then
verify=0
fi
}
_has_binary() {
command -v "${1}" >/dev/null 2>&1 || {
_log "ERROR" "${1} is not installed or not found in \$PATH"
exit 1
}
}
_has_optional_envar() {
local option="${1}"
# shellcheck disable=SC2015
[[ "${!option}" == "" ]] && {
_log "WARN" "Unset optional variable ${option}"
} || {
_log "INFO" "Found variable '${option}' with value '${!option}'"
}
}
_has_envar() {
local option="${1}"
# shellcheck disable=SC2015
[[ "${!option}" == "" ]] && {
_log "ERROR" "Unset variable ${option}"
exit 1
} || {
_log "INFO" "Found variable '${option}' with value '${!option}'"
}
}
_has_valid_ip() {
local ip="${1}"
local variable_name="${2}"
if ! ipcalc "${ip}" | awk 'BEGIN{FS=":"; is_invalid=0} /^INVALID/ {is_invalid=1; print $1} END{exit is_invalid}' >/dev/null 2>&1; then
_log "INFO" "Variable '${variable_name}' has an invalid IP address '${ip}'"
exit 1
else
_log "INFO" "Variable '${variable_name}' has a valid IP address '${ip}'"
fi
}
verify_age() {
_has_envar "BOOTSTRAP_AGE_PUBLIC_KEY"
_has_envar "SOPS_AGE_KEY_FILE"
if [[ ! "$BOOTSTRAP_AGE_PUBLIC_KEY" =~ ^age.* ]]; then
_log "ERROR" "BOOTSTRAP_AGE_PUBLIC_KEY does not start with age"
exit 1
else
_log "INFO" "Age public key is in the correct format"
fi
if [[ ! -f ~/.config/sops/age/keys.txt ]]; then
_log "ERROR" "Unable to find Age file keys.txt in ~/.config/sops/age"
exit 1
else
_log "INFO" "Found Age public key '${BOOTSTRAP_AGE_PUBLIC_KEY}'"
fi
}
verify_binaries() {
_has_binary "ansible"
_has_binary "envsubst"
_has_binary "flux"
_has_binary "git"
_has_binary "age"
_has_binary "helm"
_has_binary "ipcalc"
_has_binary "jq"
_has_binary "sops"
_has_binary "ssh"
_has_binary "task"
_has_binary "terraform"
}
verify_kubevip() {
_has_envar "BOOTSTRAP_ANSIBLE_KUBE_VIP_ADDRESS"
_has_valid_ip "${BOOTSTRAP_ANSIBLE_KUBE_VIP_ADDRESS}" "BOOTSTRAP_ANSIBLE_KUBE_VIP_ADDRESS"
}
verify_metallb() {
local ip_floor=
local ip_ceil=
_has_envar "BOOTSTRAP_METALLB_LB_RANGE"
_has_envar "BOOTSTRAP_METALLB_TRAEFIK_ADDR"
ip_floor=$(echo "${BOOTSTRAP_METALLB_LB_RANGE}" | cut -d- -f1)
ip_ceil=$(echo "${BOOTSTRAP_METALLB_LB_RANGE}" | cut -d- -f2)
_has_valid_ip "${ip_floor}" "BOOTSTRAP_METALLB_LB_RANGE"
_has_valid_ip "${ip_ceil}" "BOOTSTRAP_METALLB_LB_RANGE"
_has_valid_ip "${BOOTSTRAP_METALLB_TRAEFIK_ADDR}" "BOOTSTRAP_METALLB_TRAEFIK_ADDR"
}
verify_git_repository() {
_has_envar "BOOTSTRAP_GIT_REPOSITORY"
export GIT_TERMINAL_PROMPT=0
pushd "$(mktemp -d)" >/dev/null 2>&1
[ "$(git ls-remote "${BOOTSTRAP_GIT_REPOSITORY}" 2> /dev/null)" ] || {
_log "ERROR" "Unable to find the remote Git repository '${BOOTSTRAP_GIT_REPOSITORY}'"
exit 1
}
popd >/dev/null 2>&1
export GIT_TERMINAL_PROMPT=1
}
verify_cloudflare() {
local account_zone=
local errors=
_has_envar "BOOTSTRAP_CLOUDFLARE_APIKEY"
_has_envar "BOOTSTRAP_CLOUDFLARE_DOMAIN"
_has_envar "BOOTSTRAP_CLOUDFLARE_EMAIL"
# Try to retrieve zone information from Cloudflare's API
account_zone=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones?name=${BOOTSTRAP_CLOUDFLARE_DOMAIN}&status=active" \
-H "X-Auth-Email: ${BOOTSTRAP_CLOUDFLARE_EMAIL}" \
-H "X-Auth-Key: ${BOOTSTRAP_CLOUDFLARE_APIKEY}" \
-H "Content-Type: application/json"
)
if [[ "$(echo "${account_zone}" | jq ".success")" == "true" ]]; then
_log "INFO" "Verified Cloudflare Account and Zone information"
else
errors=$(echo "${account_zone}" | jq -c ".errors")
_log "ERROR" "Unable to get Cloudflare Account and Zone information ${errors}"
exit 1
fi
}
verify_ansible_hosts() {
local node_id=
local node_addr=
local node_username=
local node_password=
local node_control=
local node_hostname=
local default_control_node_prefix=
local default_worker_node_prefix=
default_control_node_prefix="BOOTSTRAP_ANSIBLE_DEFAULT_CONTROL_NODE_HOSTNAME_PREFIX"
default_worker_node_prefix="BOOTSTRAP_ANSIBLE_DEFAULT_NODE_HOSTNAME_PREFIX"
_has_optional_envar "${default_control_node_prefix}"
_has_optional_envar "${default_worker_node_prefix}"
for var in "${!BOOTSTRAP_ANSIBLE_HOST_ADDR_@}"; do
node_id=$(echo "${var}" | awk -F"_" '{print $5}')
node_addr="BOOTSTRAP_ANSIBLE_HOST_ADDR_${node_id}"
node_username="BOOTSTRAP_ANSIBLE_SSH_USERNAME_${node_id}"
node_password="BOOTSTRAP_ANSIBLE_SUDO_PASSWORD_${node_id}"
node_control="BOOTSTRAP_ANSIBLE_CONTROL_NODE_${node_id}"
node_hostname="BOOTSTRAP_ANSIBLE_HOSTNAME_${node_id}"
_has_envar "${node_addr}"
_has_envar "${node_username}"
_has_envar "${node_password}"
_has_envar "${node_control}"
_has_optional_envar "${node_hostname}"
if ssh -q -o BatchMode=yes -o ConnectTimeout=5 "${!node_username}"@"${!var}" "true"; then
_log "INFO" "Successfully SSH'ed into host '${!var}' with username '${!node_username}'"
else
_log "ERROR" "Unable to SSH into host '${!var}' with username '${!node_username}'"
exit 1
fi
done
}
success() {
printf "\nAll checks pass!"
exit 0
}
generate_ansible_host_secrets() {
local node_id=
local node_username=
local node_password=
local node_hostname=
default_control_node_prefix=${BOOTSTRAP_ANSIBLE_DEFAULT_CONTROL_NODE_HOSTNAME_PREFIX:-k8s-}
default_worker_node_prefix=${BOOTSTRAP_ANSIBLE_DEFAULT_NODE_HOSTNAME_PREFIX:-k8s-}
for var in "${!BOOTSTRAP_ANSIBLE_HOST_ADDR_@}"; do
node_id=$(echo "${var}" | awk -F"_" '{print $5}')
if [[ "${!node_control}" == "true" ]]; then
node_hostname="BOOTSTRAP_ANSIBLE_HOSTNAME_${node_id}"
host_key="${!node_hostname:-${default_control_node_prefix}}"
if [ "${host_key}" == "${default_control_node_prefix}" ]; then
node_hostname=${default_control_node_prefix}${node_id}
else
node_hostname=${!node_hostname}
fi
else
node_hostname="BOOTSTRAP_ANSIBLE_HOSTNAME_${node_id}"
host_key="${!node_hostname:-${default_worker_node_prefix}}"
if [ "${host_key}" == "${default_worker_node_prefix}" ]; then
node_hostname=${default_worker_node_prefix}${node_id}
else
node_hostname=${!node_hostname}
fi
fi
{
node_username="BOOTSTRAP_ANSIBLE_SSH_USERNAME_${node_id}"
node_password="BOOTSTRAP_ANSIBLE_SUDO_PASSWORD_${node_id}"
printf "kind: Secret\n"
printf "ansible_user: %s\n" "${!node_username}"
printf "ansible_become_pass: %s\n" "${!node_password}"
} > "${PROJECT_DIR}/provision/ansible/inventory/host_vars/${node_hostname}.sops.yml"
sops --encrypt --in-place "${PROJECT_DIR}/provision/ansible/inventory/host_vars/${node_hostname}.sops.yml"
done
}
generate_ansible_hosts() {
local worker_node_count=
default_control_node_prefix=${BOOTSTRAP_ANSIBLE_DEFAULT_CONTROL_NODE_HOSTNAME_PREFIX:-k8s-}
default_worker_node_prefix=${BOOTSTRAP_ANSIBLE_DEFAULT_NODE_HOSTNAME_PREFIX:-k8s-}
{
printf -- "---\n"
printf "kubernetes:\n"
printf " children:\n"
printf " master:\n"
printf " hosts:\n"
worker_node_count=0
for var in "${!BOOTSTRAP_ANSIBLE_HOST_ADDR_@}"; do
node_id=$(echo "${var}" | awk -F"_" '{print $5}')
node_control="BOOTSTRAP_ANSIBLE_CONTROL_NODE_${node_id}"
if [[ "${!node_control}" == "true" ]]; then
node_hostname="BOOTSTRAP_ANSIBLE_HOSTNAME_${node_id}"
host_key="${!node_hostname:-${default_control_node_prefix}}"
if [ "${host_key}" == "${default_control_node_prefix}" ]; then
node_hostname=${default_control_node_prefix}${node_id}
else
node_hostname=${!node_hostname}
fi
printf " %s:\n" "${node_hostname}"
printf " ansible_host: %s\n" "${!var}"
else
worker_node_count=$((worker_node_count+1))
fi
done
if [[ ${worker_node_count} -gt 0 ]]; then
printf " worker:\n"
printf " hosts:\n"
for var in "${!BOOTSTRAP_ANSIBLE_HOST_ADDR_@}"; do
node_id=$(echo "${var}" | awk -F"_" '{print $5}')
node_control="BOOTSTRAP_ANSIBLE_CONTROL_NODE_${node_id}"
if [[ "${!node_control}" == "false" ]]; then
node_hostname="BOOTSTRAP_ANSIBLE_HOSTNAME_${node_id}"
host_key="${!node_hostname:-${default_worker_node_prefix}}"
if [ "${host_key}" == "${default_worker_node_prefix}" ]; then
node_hostname=${default_worker_node_prefix}${node_id}
else
node_hostname=${!node_hostname}
fi
printf " %s:\n" "${node_hostname}"
printf " ansible_host: %s\n" "${!var}"
fi
done
fi
} > "${PROJECT_DIR}/provision/ansible/inventory/hosts.yml"
}
_log() {
local type="${1}"
local msg="${2}"
printf "[%s] [%s] %s\n" "$(date -u)" "${type}" "${msg}"
}
main "$@"