191 lines
5.1 KiB
Bash
191 lines
5.1 KiB
Bash
set -euo pipefail
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. driglibash-base
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fakeresolve_ip_list () {
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if [ "$#" -ne 1 ] ; then
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die "Usage: fakeresolve_ip_list <name>"
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fi
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grep -oP "^$1[[:space:]]+(IN)?[[:space:]]+A{1,4}[[:space:]]+\K[^;\s]+" "$debian_bind_confdir/$server_zone_file" | tr '\n' ';'
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}
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prepare () {
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# Install dependencies
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apt install -y bind9 &>/dev/null
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# Create Directories
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if [ -n "$keydir" ] ; then
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mkdir -p "$keydir"
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chown bind:bind "$keydir" -R
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chown bind:bind "$debian_bind_confdir" -R
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fi
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# Sync the git repo
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run sudo -u bind git_update.sh -N -b main -i "$DATA_DIR/gitkey" -d "$debian_bind_confdir" 'ssh://git@git.jean-cloud.net:22529/adrian/dnszones.git'
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cd /etc/bind
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echo 'Prepare bind: Remove autogenerated part from bind conf files'
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sed -i -n "/$autoconf_separator/q;p" "$debian_bind_confdir"/*
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echo 'Put the separator back'
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for file in $( ls "$debian_bind_confdir"/template.db.* | grep -v '.signed$\|.jbk$\|.jnl$') ; do
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echo "$autoconf_separator" >> "$file"
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done
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}
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restart () {
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echo 'Restart named'
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systemctl restart named
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}
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# Function that simulate a DNS resolve by reading bind zone file
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# Returns all the record line:
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# @ IN A X.X.X.X
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fakeresolve () {
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if [ "$#" -ne 1 ] ; then
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die "Usage: fakeresolve <name>"
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fi
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name="$1"
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zonefile="$debian_bind_confdir/$server_zone_file"
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# Split full name if there are dots
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shortname="$name"
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if [ -n "$(echo "$name" | grep -o '\.')" ] ; then
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shortname="$(echo "$name" | grep -Po '^.*(?=\.[^\.]+\.[^\.]+$)' || true)"
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fi
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grep -v -e '^[[:space:]]*;' "$zonefile" |grep -oP "^[[:space:]]*$shortname\K[[:space:]]*(IN)?[[:space:]]*A{1,4}[[:space:]]*[\S;]+" | sed 's/^/@/'
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}
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# Function that add DNS record in the right file
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addbindline () {
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if [ "$#" -ne 2 ] ; then
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die "Usage: addbindline <name> <target_cname>"
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fi
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name="$1"
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target="$2"
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# extract the truc.com part
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domain="$(echo "$name" | grep -o '[^\.]\+\.[^\.]\+$' || true)"
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[ -z "$domain" ] && return 0
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# extract the subdomain part (www)
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shortname="$(echo "$name" | grep -Po '^.*(?=\.[^\.]+\.[^\.]+$)' || true)"
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# bind DB file
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bindfile="$debian_bind_confdir/db.$domain"
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# Only append if db file exists
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[ ! -f "$bindfile" ] && return 0
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# BTW allow ACME DNS update
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token="#JC-ACME $domain"
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acme_dns="grant letsencrypt.key. name _acme-challenge.$name. TXT;"
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sed -i "s/\([[:space:]]*\)$token/\1$acme_dns\n\1$token/" "$debian_bind_confdir/named.conf.local"
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# TODO check if name already existst with a different target
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# Hard since we are resolving targets now…
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# CNAME are forbiden for empty shortnames, so we must resolve the target IPs
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# For performance reasons, we just put plain IP everywhere
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# to put aliases in place of ip juste do the following if $shortname is empty:
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#line_in_file "$shortname CNAME $target." "$bindfile"
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while read line ; do
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if [ -n "$shortname" ] ; then
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line="$(echo "$line" | sed "s/@/$shortname/")"
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fi
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line_in_file "$line" "$bindfile"
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done < <(fakeresolve "$target")
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}
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list_template_db_files () {
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ls "$debian_bind_confdir"/template.db.*
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}
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create_primary_files () {
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# Compact the default SOA
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SOA="$(grep -o '^[^;]*' SOA | sed -z -e 's/[[:space:]]\{2,\}/ /g' -e 's/\n/\\n/')"
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line_in_file "include \"$DATA_DIR/letsencrypt.key\";" "$debian_bind_confdir/named.conf"
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for file in $(list_template_db_files) ; do
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domain="$(basename "$file" | sed 's/template.db.//')"
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new_db_file="$(echo "$file" | sed 's/template.db./db./')"
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# Set the default SOA if needed
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sed "s/^;JC_AUTOSOA$/$SOA/" "$file" > "$new_db_file"
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# Set serial
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serial="$(date '+%s')"
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sed -i "s/\(@ SOA [^(]*( \)[0-9]\+/\1$serial/" "$new_db_file"
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# If no NS record in the db file
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if [ -z "$(grep '[^;].*(IN)?.*NS' "$new_db_file")" ] ; then
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echo "@ NS $default_dns_name" >> "$new_db_file"
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fi
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# Populate named.conf.local
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cat >> "$debian_bind_confdir/named.conf.local" <<-EOF
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zone "$domain" {
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# Zone file
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type master;
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file "$new_db_file";
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# Secondary conf
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# https://kb.isc.org/docs/aa-00723
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#allow-update { !{!{$secondary_ips};any;}; key update-key; };
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allow-transfer { $secondary_ips };
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also-notify { $secondary_ips };
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notify yes;
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# DNSSEC
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dnssec-policy default;
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inline-signing yes;
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key-directory "$DATA_DIR/keys";
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# ACME autorizations
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update-policy {
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#JC-ACME $domain
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};
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};
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EOF
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done
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echo 'Find every used domain and add them to bind db'
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while read line ; do
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read -r service target < <(echo "$line")
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addbindline "$service" "$target"
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nginxfile="/docker/$service/nginx_server.conf"
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if [ -f "$nginxfile" ] ; then
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for name in $(extract_domain_nginx_conf.sh "$nginxfile" | template.sh "/docker/$service/.env") ; do
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addbindline "$name" "$target"
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done
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fi
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done <"$servicefile"
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}
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create_secondary_files () {
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primary_ips="$(echo "$primary_ips" | sed 's/^;//')"
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for file in "$debian_bind_confdir"/template.db.* ; do
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file="$(echo "$file" | sed -e 's/template.db.//' -e "s#$debian_bind_confdir#/var/lib/bind/#")"
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domain="$(basename "$file")"
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echo -n "
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zone \"$domain\" {
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masters { $primary_ips };
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type slave;
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file \"$file\";
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};" >> "$debian_bind_confdir/named.conf.local"
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done
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}
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