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haproxy: deploy script can update existing certificate over stats socket

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Since version 2.2, HAProxy is able to update dynamically certificates,
without a reload.

This patch uses socat to push the certificate into HAProxy in order to
achieve hot update. With this method, reloading is not required.
This should be used only to update an existing certificate in haproxy.

2 new variables are available:

- DEPLOY_HAPROXY_HOT_UPDATE="yes" update over the stats socket instead
  of reloading

- DEPLOY_HAPROXY_STATS_SOCKET="UNIX:/run/haproxy/admin.sock" set the path on
  the stats socket.
This commit is contained in:
William Lallemand 2023-03-16 17:24:24 +01:00 committed by William Lallemand
parent 7aaf4432d4
commit 0f7be90500
1 changed files with 72 additions and 8 deletions
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64
deploy/haproxy.sh
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@ -36,6 +36,14 @@
# Note: This functionality requires HAProxy was compiled against
# a version of OpenSSL that supports this.
#
# export DEPLOY_HAPROXY_HOT_UPDATE="yes"
# export DEPLOY_HAPROXY_STATS_SOCKET="UNIX:/run/haproxy/admin.sock"
#
# OPTIONAL: Deploy the certificate over the HAProxy stats socket without
# needing to reload HAProxy. Default is "no".
#
# Require the socat binary. DEPLOY_HAPROXY_STATS_SOCKET variable uses the socat
# address format.
######## Public functions #####################
@ -53,6 +61,8 @@ haproxy_deploy() {
DEPLOY_HAPROXY_BUNDLE_DEFAULT="no"
DEPLOY_HAPROXY_ISSUER_DEFAULT="no"
DEPLOY_HAPROXY_RELOAD_DEFAULT="true"
DEPLOY_HAPROXY_HOT_UPDATE_DEFAULT="no"
DEPLOY_HAPROXY_STATS_SOCKET_DEFAULT="UNIX:/run/haproxy/admin.sock"
_debug _cdomain "${_cdomain}"
_debug _ckey "${_ckey}"
@ -118,6 +128,26 @@ haproxy_deploy() {
Le_Deploy_haproxy_reload="${DEPLOY_HAPROXY_RELOAD_DEFAULT}"
fi
# HOT_UPDATE is optional. If not provided then assume "${DEPLOY_HAPROXY_HOT_UPDATE_DEFAULT}"
_getdeployconf DEPLOY_HAPROXY_HOT_UPDATE
_debug2 DEPLOY_HAPROXY_HOT_UPDATE "${DEPLOY_HAPROXY_HOT_UPDATE}"
if [ -n "${DEPLOY_HAPROXY_HOT_UPDATE}" ]; then
Le_Deploy_haproxy_hot_update="${DEPLOY_HAPROXY_HOT_UPDATE}"
_savedomainconf Le_Deploy_haproxy_hot_update "${Le_Deploy_haproxy_hot_update}"
elif [ -z "${Le_Deploy_haproxy_hot_update}" ]; then
Le_Deploy_haproxy_hot_update="${DEPLOY_HAPROXY_HOT_UPDATE_DEFAULT}"
fi
# STATS_SOCKET is optional. If not provided then assume "${DEPLOY_HAPROXY_STATS_SOCKET_DEFAULT}"
_getdeployconf DEPLOY_HAPROXY_STATS_SOCKET
_debug2 DEPLOY_HAPROXY_STATS_SOCKET "${DEPLOY_HAPROXY_STATS_SOCKET}"
if [ -n "${DEPLOY_HAPROXY_STATS_SOCKET}" ]; then
Le_Deploy_haproxy_stats_socket="${DEPLOY_HAPROXY_STATS_SOCKET}"
_savedomainconf Le_Deploy_haproxy_stats_socket "${Le_Deploy_haproxy_stats_socket}"
elif [ -z "${Le_Deploy_haproxy_stats_socket}" ]; then
Le_Deploy_haproxy_stats_socket="${DEPLOY_HAPROXY_STATS_SOCKET_DEFAULT}"
fi
# Set the suffix depending if we are creating a bundle or not
if [ "${Le_Deploy_haproxy_bundle}" = "yes" ]; then
_info "Bundle creation requested"
@ -142,6 +172,7 @@ haproxy_deploy() {
_issuer="${_pem}.issuer"
_ocsp="${_pem}.ocsp"
_reload="${Le_Deploy_haproxy_reload}"
_statssock="${Le_Deploy_haproxy_stats_socket}"
_info "Deploying PEM file"
# Create a temporary PEM file
@ -265,6 +296,38 @@ haproxy_deploy() {
fi
fi
if [ "${Le_Deploy_haproxy_hot_update}" = "yes" ]; then
# Update certificate over HAProxy stats socket.
_info "Update the certificate over HAProxy stats socket."
if _exists socat; then
_socat_cert_cmd="echo 'show ssl cert' | socat '${_statssock}' - | grep -q '^${_pem}$'"
_debug _socat_cert_cmd "${_socat_cert_cmd}"
eval "${_socat_cert_cmd}"
_ret=$?
if [ "${_ret}" != "0" ]; then
_err "Couldn't find '${_pem}' in haproxy 'show ssl cert'"
return "${_ret}"
fi
_socat_cert_set_cmd="echo -e 'set ssl cert ${_pem} <<\n$(cat "${_pem}")\n' | socat '${_statssock}' - | grep -q 'Transaction created'"
_debug _socat_cert_set_cmd "${_socat_cert_set_cmd}"
eval "${_socat_cert_set_cmd}"
_ret=$?
if [ "${_ret}" != "0" ]; then
_err "Can't update '${_pem}' in haproxy"
return "${_ret}"
fi
_socat_cert_commit_cmd="echo 'commit ssl cert ${_pem}' | socat '${_statssock}' - | grep -q '^Success!$'"
_debug _socat_cert_commit_cmd "${_socat_cert_commit_cmd}"
eval "${_socat_cert_commit_cmd}"
_ret=$?
if [ "${_ret}" != "0" ]; then
_err "Can't commit '${_pem}' in haproxy"
return ${_ret}
fi
else
_err "'socat' is not available, couldn't update over stats socket"
fi
else
# Reload HAProxy
_debug _reload "${_reload}"
eval "${_reload}"
@ -275,6 +338,7 @@ haproxy_deploy() {
else
_info "Reload successful"
fi
fi
return 0
}