[ci skip] Add cert auto renewal

.gitlab-ci.yml

@@ -1,5 +1,5 @@
 
-image: node:8.9
+image: node:8.12
 
 pages:
   script:
@@ -18,3 +18,21 @@ pages:
 
   only:
   - master
+
+cert-renewal:
+  only:
+    - schedules
+  variables:
+    CERTBOT_RENEWAL_GIT_TOKEN: $CERTBOT_RENEWAL_GIT_TOKEN
+  script:
+    - echo "deb http://ftp.debian.org/debian jessie-backports main" >> /etc/apt/sources.list
+    - apt-get update
+    - apt-get install certbot -t jessie-backports -y
+    - apt-get install git curl -y
+    - export PATH=$PATH:$CI_PROJECT_DIR
+    - git config --global user.name $GITLAB_USER_LOGIN
+    - git config --global user.email $GITLAB_USER_EMAIL
+    - chmod +x  ./letsencrypt_generate.sh
+    - chmod +x  ./letsencrypt_authenticator.sh
+    - chmod +x  ./letsencrypt_cleanup.sh
+    - ./letsencrypt_generate.sh

letsencrypt_authenticator.sh

@@ -0,0 +1,25 @@
+
+#!/bin/bash
+# source https://www.harenslak.nl/blog/https-letsencrypt-gitlab-hugo
+
+mkdir -p $CI_PROJECT_DIR/static/.well-known/acme-challenge
+echo $CERTBOT_VALIDATION > $CI_PROJECT_DIR/static/.well-known/acme-challenge/$CERTBOT_TOKEN
+git add $CI_PROJECT_DIR/static/.well-known/acme-challenge/$CERTBOT_TOKEN
+git commit -m "GitLab runner - Added certbot challenge file for certificate renewal"
+git push https://$GITLAB_USER_LOGIN:$CERTBOT_RENEWAL_GIT_TOKEN@gitlab.com/fediverse/fediverse.gitlab.io.git HEAD:master
+
+interval_sec=15
+max_tries=10 # ~3 minutes
+n_tries=0
+while [ $n_tries -le $max_tries ]
+do
+  status_code=$(curl -L --write-out "%{http_code}\n" --silent --output /dev/null https://fediverse.party/.well-known/acme-challenge/$CERTBOT_TOKEN)
+  if [[ $status_code -eq 200 ]]; then
+    exit 0
+  fi
+
+  n_tries=$((n_tries+1))
+  sleep $interval_sec
+done
+
+exit 1

letsencrypt_cleanup.sh

@@ -0,0 +1,7 @@
+
+#!/bin/bash
+# source https://www.harenslak.nl/blog/https-letsencrypt-gitlab-hugo
+
+git rm $CI_PROJECT_DIR/static/.well-known/acme-challenge/$CERTBOT_TOKEN
+git commit -m "GitLab runner - Removed certbot challenge file"
+git push https://$GITLAB_USER_LOGIN:$CERTBOT_RENEWAL_GIT_TOKEN@gitlab.com/fediverse/fediverse.gitlab.io.git HEAD:master

letsencrypt_generate.sh

@@ -0,0 +1,19 @@
+
+#!/bin/bash
+# source https://www.harenslak.nl/blog/https-letsencrypt-gitlab-hugo
+
+end_epoch=$(date -d "$(echo | openssl s_client -connect fediverse.party:443 -servername fediverse.party 2>/dev/null | openssl x509 -enddate -noout | cut -d'=' -f2)" "+%s")
+current_epoch=$(date "+%s")
+renew_days_threshold=30
+days_diff=$((($end_epoch - $current_epoch) / 60 / 60 / 24))
+
+if [ $days_diff -lt $renew_days_threshold ]; then
+  ls
+  echo "Certificate is $days_diff days old, renewing now."
+  certbot certonly --manual --debug --preferred-challenges=http -m $GITLAB_USER_EMAIL --agree-tos --manual-auth-hook letsencrypt_authenticator.sh --manual-cleanup-hook letsencrypt_cleanup.sh --manual-public-ip-logging-ok -d fediverse.party -d www.fediverse.party
+  echo "Certbot finished. Updating GitLab Pages domains."
+  curl --request PUT --header "PRIVATE-TOKEN: $CERTBOT_RENEWAL_GIT_TOKEN" --form "certificate=@/etc/letsencrypt/live/fediverse.party/fullchain.pem" --form "key=@/etc/letsencrypt/live/fediverse.party/privkey.pem" https://gitlab.com/api/v4/projects/$CI_PROJECT_ID/pages/domains/fediverse.party
+  curl --request PUT --header "PRIVATE-TOKEN: $CERTBOT_RENEWAL_GIT_TOKEN" --form "certificate=@/etc/letsencrypt/live/fediverse.party/fullchain.pem" --form "key=@/etc/letsencrypt/live/fediverse.party/privkey.pem" https://gitlab.com/api/v4/projects/$CI_PROJECT_ID/pages/domains/www.fediverse.party
+else
+  echo "Certificate still valid for $days_diff days, no renewal required."
+fi