new: [apache] improve domain specification and provide service to domain mapping facility

3 months ago · 8b46dce6cb
8 changed files with 733 additions and 129 deletions
--- a/apache/README.org
+++ b/apache/README.org
@ -0,0 +1,188 @@
+
+
+* Usage
+
+Other services will often require a service managed with this charm to
+act as a HTTP/HTTPS front-end. It can provide certificates with HTTPS.
+
+
+** Domain assignment
+
+Services using relation =web-proxy= or =publish-dir= will be required
+to be assigned a domain name for the virtual host that will be
+created.
+
+*** Domain sources
+
+This domain name can be set (in order of priority), the first source
+giving a name will be taken.
+
+- *Relation's options* (=web-proxy= or =publish-dir=)
+  Using =domain= option, and optionally the deprecated
+ =server-aliases= for additional names.
+
+  #+begin_src yaml
+  myservice:
+    # ...
+    relations:
+      web-proxy:
+        apache:
+          domain: mydomain.org
+          #server-aliases:
+          #  - www.mydomain.org
+          #  - pro.mydomain.org
+  #+end_src
+- *Apache service's options*, using a =service-domain-name= mapping:
+
+  #+begin_src yaml
+  myservice:
+    # ...
+  apache:
+    options:
+      service-domain-map:
+        # ...
+        myservice:
+          - mydomain.org
+          - www.mydomain.org
+          - pro.mydomain.org
+        # ...
+  #+end_src
+
+- *the service name* itself if is a domain name:
+
+  #+begin_src yaml
+  www.mydomain.org:
+    # ...
+  #+end_src
+
+  Please note that this is not recommended, and will be deprecated.
+
+*** Domain and alternate domains
+
+Every source (except the one coming out from the domain name), can use
+several ways to provide *more than one domain name*.
+
+Please remember:
+- At least one domain name needs to be provided
+- and the first domain can't use wildcards and will be considered the main domain name.
+
+If other domains are specified, they will be used as aliases, and
+wildcard (using ~*~) is supported.
+
+Additionally, bash braces expansion and regex matching are
+available. Space separated YAML string or YAML sequences are
+supported, also as mix of both.
+
+As examples, notice the following are equivalent and will serve
+=myservice= on the exact same set of domain names:
+
+#+begin_src yaml
+myservice:
+  relations:
+    web-proxy:
+      domain:
+        ## A yaml list
+        - myservice.home.org
+        - mydomain.org
+        - www.mydomain.org
+        - pro.mydomain.org
+        - *.myservice.hop.org
+#+end_src
+
+
+#+begin_src yaml
+myservice:
+  # ... no domain set in relation
+apache:
+  options:
+    service-domain-map:
+      ## A yaml list as a mapping value
+      myservice:
+        - myservice.home.org
+        - {,www.,pro.}mydomain.org  ## bash braces expansion used
+        - *.myservice.hop.org
+#+end_src
+
+#+begin_src yaml
+myservice:
+  # ...
+apache:
+  options:
+    service-domain-map:
+      ## space separated YAML string and bash braces expansion
+      myservice: myservice.home.org {,www.,pro.}mydomain.org *.myservice.hop.org
+#+end_src
+
+#+begin_src yaml
+myservice:
+  # ...
+apache:
+  options:
+    service-domain-map:
+      ## Leveraging bash braces expansion and regex replacement
+      .*: {$0.home,{,www.,pro.}mydomain,*.$0.hop}.org
+#+end_src
+
+** Domain mapping
+
+You can automatically assign a domain to services in relation
+=web-proxy= or =publish-dir= with services managed by this charm using
+the =service-domain-name= option. For instance:
+
+#+begin_src yaml
+apache:
+  options:
+    service-domain-map:
+      .*: $0.mydomain.org
+#+end_src
+
+Where ~mydomain.org~ stands for the domain where most of your services
+will be served. You can override this behavior for some services:
+- by adding a matching rule *before* the given rule.
+- by specifying a =domain= in the relation's options.
+
+first rule matching will end the mapping:
+
+#+begin_src yaml
+apache:
+  options:
+    service-domain-map:
+      foo: www.mydomain.org
+      bar: beta.myotherdomain.com
+#+end_src
+
+Allows to distribute services to domains quite freely.
+
+
+* SSH Tunnel
+
+On the server side, you can configure your compose file::
+
+#+begin_src yaml
+apache:
+  options:
+    ssh-tunnel:
+      domain: ssh.domain.com     ## required
+      #ssh: ...                  ## required, but automatically setup if you
+                                 ## provide a ``cert-provider`` to ``apache``.
+#+end_src
+
+
+On the client side you should add this to your ``~/.ssh/config``::
+
+#+begin_src conf-space
+Host ssh.domain.com
+    Port 443
+    ProxyCommand proxytunnel -q -E -p ssh.domain.com:443 -d ssh.domain.com:22
+    DynamicForward 1080
+    ServerAliveInterval 60
+#+end_src
+
+If it doesn't work, you can do some checks thanks to this command::
+
+#+begin_example
+$ proxytunnel -E -p ssh.domain.com:443 -d ssh.domain.com:22 -v \
+    -H "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Win32)\n"
+#+end_example
+
+
--- a/apache/README.rst
+++ b/apache/README.rst
@ -1,29 +0,0 @@
-
-
-SSH Tunnel
----------
-
-On the server side, you can configure your compose file::
-
-    apache:
-      options:
-        ssh-tunnel:
-          domain: ssh.domain.com     ## required
-          #ssh: ...                  ## required, but automatically setup if you
-                                     ## provide a ``cert-provider`` to ``apache``.
-
-
-On the client side you should add this to your ``~/.ssh/config``::
-
-    Host ssh.domain.com
-        Port 443
-        ProxyCommand proxytunnel -q -E -p ssh.domain.com:443 -d ssh.domain.com:22
-        DynamicForward 1080
-        ServerAliveInterval 60
-
-If it doesn't work, you can do some checks thanks to this command::
-
-    $ proxytunnel -E -p ssh.domain.com:443 -d ssh.domain.com:22 -v \
-        -H "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Win32)\n"
-
-
--- a/apache/hooks/publish_dir-relation-joined
+++ b/apache/hooks/publish_dir-relation-joined
@ -6,8 +6,10 @@

 set -e

+service_def=$(get_compose_service_def "$SERVICE_NAME")
+
 cfg=$(relation-get)
-apache_publish_dir "$cfg"
+apache_publish_dir "$cfg" "$service_def"

 APACHE_CORE_RULES=$(relation-get apache-core-rules 2>/dev/null) || true
 if [ "$APACHE_CORE_RULES" ]; then
--- a/apache/hooks/web_proxy-relation-joined
+++ b/apache/hooks/web_proxy-relation-joined
@ -5,8 +5,10 @@ set -e

 . lib/common

+service_def=$(get_compose_service_def "$SERVICE_NAME")
+
 cfg=$(relation-get)
-apache_proxy_dir "$cfg"
+apache_proxy_dir "$cfg" "$service_def"

 APACHE_CORE_RULES=$(relation-get apache-core-rules 2>/dev/null) || true
 if [ "$APACHE_CORE_RULES" ]; then
--- a/apache/lib/common
+++ b/apache/lib/common
@ -1,22 +1,163 @@
 # -*- mode: shell-script -*-

+replace_by_rematch_pattern() {
+    local input="$1" output="" char next_char i
+    # Loop through each character in the string
+    for (( i=0; i<${#input}; i++ )); do
+        char="${input:$i:1}"
+
+        # If a dollar sign is found
+        if [[ "$char" == '$' ]]; then
+            next_char="${input:$((i+1)):1}"
+            # Check if next character is a digit
+            if [[ "$next_char" =~ [0-9] ]]; then
+                # Replace $N with ${rematch[N]}
+                output+='${rematch['"$next_char"']}'
+                ((i++)) # Skip next character as it's already processed
+                continue
+            fi
+        fi

-get_domain() {
-    local cfg="$1" cache_file="$state_tmpdir/$FUNCNAME.cache.$(H "$SERVICE_NAME" "$MASTER_BASE_SERVICE_NAME" "$@")" \
-          domain
+        output+="$char"
+    done
+
+    echo "$output"
+}
+export -f replace_by_rematch_pattern
+
+
+
+get_domains() {
+    local cfg="$1" service_cfg="$2" cache_file="$state_tmpdir/$FUNCNAME.cache.$(H "$SERVICE_NAME" "$MASTER_BASE_SERVICE_NAME" "$@")" \
+          domains new_domains maps m regex rematch type value key domain
    if [ -e "$cache_file" ]; then
        cat "$cache_file"
        return 0
    fi
-    domain=$(e "$cfg" | cfg-get-value domain 2>/dev/null) || true
-    if [ "$domain" ]; then
-        echo "$domain" | tee "$cache_file"
-    elif [[ "$BASE_SERVICE_NAME" =~ ^([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,}$ ]]; then
-        echo "$BASE_SERVICE_NAME" | tee "$cache_file"
-    else
-        err "You must specify a ${WHITE}domain$NORMAL option. (${FUNCNAME[*]})"
+    domains=()
+    for key in domain server-aliases; do
+        type=$(e "$cfg" | shyaml -q get-type "$key" 2>/dev/null) || true
+        value=$(e "$cfg" | shyaml -q get-value -y "$key" 2>/dev/null) || true
+        while true; do
+            case "$type" in
+                sequence)
+                    while read-0 domain; do
+                        if [[ "$domain" != "None" ]]; then
+                            if [ "${#domains[@]}" == 0 ] && [ "$key" == "server-aliases" ]; then
+                                err "You can't specify server aliases if you don't have a domain."
+                                return 1
+                            fi
+
+                            domains+=("$domain")
+                        fi
+                    done < <(e "$value" | shyaml get-values-0)
+                    ;;
+                str)
+                    if ! domain=$(e "$value" | shyaml get-value 2>/dev/null); then                        
+                        err "Failed to get domain value from config."
+                        return 1
+                    fi
+                    [[ "$domain" == "" ]] && break
+                    if [ "${#domains[@]}" == 0 ] && [ "$key" == "server-aliases" ]; then
+                        err "You can't specify server aliases if you don't have a domain."
+                        return 1
+                    fi
+
+                    domains+=("$domain")
+                    ;;
+                NoneType|"")
+                    :
+                    ;;
+                \!*)
+                    value=$(e "$value" | cfg-get-value "$key" 2>/dev/null) || true
+                    type=$(e "$value" | shyaml -q get-type) || true
+                    continue
+                    ;;
+            esac
+            break
+        done
+        ## check and expand domain
+        new_domains=()
+        for domain in "${domains[@]}"; do
+            if ! [[ "$domain" =~ ^[a-z0-9\{\}*\ \,.-]+$ ]]; then
+                err "Invalid domain value '$domain' expression in ${WHITE}$key$NORMAL option."
+                return 1
+            fi
+            new_domains+=($(eval echo "${domain//\*/\\*}"))
+        done
+        domains=("${new_domains[@]}")
+    done
+    ## Fill with service-domain-map
+    if [ "${#domains[@]}" == 0 ] &&
+           service_domain_map=$(e "$service_cfg" | cfg-get-value 'options.service-domain-map' 2>/dev/null) &&
+           [ -n "$service_domain_map" ]; then
+        while read-0 regex map; do
+            if [[ "$BASE_SERVICE_NAME" =~ ^$regex$ ]]; then
+                rematch=("${BASH_REMATCH[@]}")
+                maps=()
+                type=$(e "$map" | shyaml -q get-type 2>/dev/null) || true
+                value=$(e "$map" | shyaml -q get-value -y 2>/dev/null) || true
+                case "$type" in
+                    sequence)
+                        while read-0 m; do
+                            if [[ "$m" != "None" ]] && [ -n "$m" ]; then
+                                maps+=("$m")
+                            fi
+                        done < <(e "$value" | shyaml get-values-0)
+                        ;;
+                    str)
+                        if ! m=$(e "$value" | shyaml get-value 2>/dev/null); then
+                            err "Failed to get mapping value from config."
+                            return 1
+                        fi
+                        [ -z "$m" ] && continue
+                        maps+=("$m")
+                        ;;
+                    NoneType|"")
+                        :
+                        ;;
+                esac
+                for map in "${maps[@]}"; do 
+                    if ! [[ "$map" =~ ^([a-z0-9*\{\}\ \,.-]|\$[0-9])+$ ]]; then
+                        err "Invalid mapping value '$map' in ${WHITE}service-domain-map$NORMAL option."
+                        return 1
+                    fi
+
+                    map="${map//\*/\\*}"  ## protect star from eval
+                    map=$(replace_by_rematch_pattern "$map")
+
+                    domains+=($(set -- "${BASH_REMATCH[@]}"; eval echo "${map//\*/\\*}"))
+                done
+                break
+            fi
+        done < <(e "$service_domain_map" | yq e -0 'to_entries | .[] | [.key, .value] |.[]')
+    fi
+    if [ "${#domains[@]}" == 0 ] &&
+           [[ "$BASE_SERVICE_NAME" =~ ^([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,}$ ]]; then
+        domains+=("$BASE_SERVICE_NAME")
+    fi
+    new_domains=()
+    ## remove duplicates
+    for domain in "${domains[@]}"; do
+        if ! [[ " ${new_domains[*]} " == *" $domain "* ]]; then
+            new_domains+=("$domain")
+        fi
+    done
+    domains=("${new_domains[@]}")
+    if [ "${#domains[@]}" == 0 ]; then
+        err "No domain name set for your service ${YELLOW}$BASE_SERVICE_NAME${NORMAL}."
+        echo "  You can specify a ${WHITE}domain$NORMAL option in the" \
+             "relation with ${YELLOW}$TARGET_SERVICE_NAME${NORMAL}." >&2
+        echo "  Or you can specify a service to domain mapping in" \
+             "${WHITE}service-domain-map${NORMAL} option of ${YELLOW}$TARGET_SERVICE_NAME${NORMAL}." >&2
        return 1
    fi
+    ## check that first domain should not have a wildcard
+    if [[ "${domains[0]}" == *"*"* ]]; then
+        err "First domain name '${domains[0]}' can't contain a wildcard."
+        return 1
+    fi
+    echo "${domains[@]}" | tee "$cache_file"
 }


@ -25,17 +166,17 @@ get_domain() {
 ##

 apache_proxy_dir() {
-    local cfg="$1" domain
-    apache_vhost_create web_proxy "$cfg" || return 1
+    local cfg="$1" service_cfg="$2"
+    apache_vhost_create web_proxy "$cfg" "$service_cfg" || return 1
 }
 export -f apache_proxy_dir


 apache_publish_dir() {
-    local cfg="$1" domain
-    apache_vhost_create publish_dir "$cfg" || return 1
-    apache_code_dir "$cfg" || return 1
-    apache_data_dirs "$cfg"
+    local cfg="$1" service_cfg="$2"
+    apache_vhost_create publish_dir "$cfg" "$service_cfg" || return 1
+    apache_code_dir "$cfg" "$service_cfg" || return 1
+    apache_data_dirs "$cfg" "$service_cfg"
 }
 export -f apache_publish_dir

@ -51,7 +192,7 @@ apache_ssh_tunnel() {
        err "${WHITE}ssl${NORMAL} must be valued in ${WHITE}ssh-tunnel${NORMAL} config."
        return 1
    fi
-    apache_vhost_create ssh_tunnel "$cfg" ",https," "000-$domain" || return 1
+    apache_vhost_create ssh_tunnel "$cfg" "" ",https," "000-$domain" || return 1
 }
 export -f apache_publish_dir

@ -62,7 +203,7 @@ export -f apache_publish_dir


 apache_vhost_create() {
-    local type="$1" cfg="$2" protocols="$3" dest="$4" custom_rules vhost_statement creds \
+    local type="$1" cfg="$2" service_cfg="$3" protocols="$4" dest="$5" custom_rules vhost_statement creds \
          redirect domain ssl_plugin_fun ssl_cfg_value ssl_cfg_options

    export APACHE_CONFIG_LOCATION="$SERVICE_CONFIGSTORE/etc/apache2/sites-enabled"
@ -73,21 +214,21 @@ apache_vhost_create() {
        protocols=$(__vhost_cfg_normalize_protocol "$cfg") || return 1
    fi

-    domain=$(get_domain "$cfg") && {
-        [ "$RELATION_DATA_FILE" ] && relation-set domain "$domain"
+    domains=($(get_domains "$cfg" "$service_cfg")) && {
+        [ "$RELATION_DATA_FILE" ] && relation-set domain "${domains[0]}"
    }
-
+    echo "Domains: ${domains[*]}" >&2
    if is_protocol_enabled https "$protocols"; then
        [ "$RELATION_DATA_FILE" ] && {
-            relation-set url "https://$domain"
+            relation-set url "https://${domains[0]}"
        }

-        if [ -z "$domain" ]; then
+        if [ "${#domains[@]}" == 0 ]; then
            err "You must specify a domain for ssl to work."
            return 1
        fi
        read-0 ssl_plugin_fun ssl_cfg_value ssl_cfg_options < <(ssl_get_plugin_fun "$cfg") || return 1
-        "$ssl_plugin_fun"_vars "$cfg" "$ssl_cfg_options" "$ssl_cfg_value" "$domain" || return 1
+        "$ssl_plugin_fun"_vars "$cfg" "$ssl_cfg_options" "$ssl_cfg_value" "${domains[*]}" || return 1
        redirect=$(e "$cfg" | cfg-get-value 'redirect-to-ssl' 2>/dev/null) || true
        if is_protocol_enabled http "$protocols"; then
            redirect=${redirect:-true}
@ -116,15 +257,15 @@ $(if [ "$custom_rules" ]; then
        fi
    else
        [ "$RELATION_DATA_FILE" ] && {
-            relation-set url "http://$domain"
+            relation-set url "http://${domains[0]}"
        }
    fi
-    vhost_statement=$(apache_vhost_statement "$type" "$protocols" "$cfg" "$domain") || {
+    vhost_statement=$(apache_vhost_statement "$type" "$protocols" "$cfg" "${domains[*]}") || {
        err "Failed to get vhost statement for type $type on ${protocols:1:-1}"
        return 1
    }

-    dest=${dest:-$domain}
+    dest=${dest:-${domains[0]}}
    if [ -z "$dest" ]; then
        err "Please set either a domain or set a destination file."
        return 1
@ -137,7 +278,7 @@ $(if [ "$custom_rules" ]; then
    fi

    if is_protocol_enabled https "$protocols"; then
-        "$ssl_plugin_fun"_prepare "$cfg" "$ssl_cfg_options" "$ssl_cfg_value"  || return 1
+        "$ssl_plugin_fun"_prepare "$cfg" "$ssl_cfg_options" "$ssl_cfg_value" "${domains[*]}" || return 1
    fi
 }

@ -296,18 +437,18 @@ ssl_get_plugin_fun() {


 ssl_fallback_vars() {
-    local cfg="$1" ssl_cfg="$2" value="$3" domain="$4" cert key ca_cert domain
-
+    local cfg="$1" ssl_cfg="$2" value="$3" domains="$4" cert key ca_cert
+    domains=($domains)
    if __vhost_cfg_ssl_cert=$(echo "$ssl_cfg" | shyaml get-value cert 2>/dev/null); then
-        __vhost_cfg_SSL_CERT_LOCATION=/etc/ssl/certs/${domain}.pem
+        __vhost_cfg_SSL_CERT_LOCATION=/etc/ssl/certs/${domains[0]}.pem
    fi

    if __vhost_cfg_ssl_key=$(echo "$ssl_cfg" | shyaml get-value key 2>/dev/null); then
-        __vhost_cfg_SSL_KEY_LOCATION=/etc/ssl/private/${domain}.key
+        __vhost_cfg_SSL_KEY_LOCATION=/etc/ssl/private/${domains[0]}.key
    fi

    if __vhost_cfg_ssl_ca_cert=$(echo "$ssl_cfg" | shyaml get-value ca-cert 2>/dev/null); then
-        __vhost_cfg_SSL_CA_CERT_LOCATION=/etc/ssl/certs/${domain}-ca.pem
+        __vhost_cfg_SSL_CA_CERT_LOCATION=/etc/ssl/certs/${domains[0]}-ca.pem
    fi
 }

@ -338,29 +479,20 @@ $volumes
 }

 ssl_plugin_cert-provider_vars() {
-    local cfg="$1" ssl_cfg="$2" value="$3" domain="$4"
-
-    __vhost_cfg_SSL_CERT_LOCATION=/etc/letsencrypt/live/${domain}/cert.pem
-    __vhost_cfg_SSL_KEY_LOCATION=/etc/letsencrypt/live/${domain}/privkey.pem
-    __vhost_cfg_SSL_CHAIN=/etc/letsencrypt/live/${domain}/chain.pem
+    local cfg="$1" ssl_cfg="$2" value="$3" domains="$4"
+    domains=($domains)
+    __vhost_cfg_SSL_CERT_LOCATION=/etc/letsencrypt/live/${domains[0]}/cert.pem
+    __vhost_cfg_SSL_KEY_LOCATION=/etc/letsencrypt/live/${domains[0]}/privkey.pem
+    __vhost_cfg_SSL_CHAIN=/etc/letsencrypt/live/${domains[0]}/chain.pem
 }

 ssl_plugin_cert-provider_prepare() {
-    local cfg="$1" ssl_cfg="$2" service="$3"  options domain server_aliases
-
-    domain=$(get_domain "$cfg") || return 1
-
+    local cfg="$1" ssl_cfg="$2" service="$3" domains="$4" options  server_aliases
+    domains=($domains)
    options=$(yaml_key_val_str "options" "$ssl_cfg") || return 1
    service_config=$(yaml_key_val_str "$service" "$options")
-    server_aliases=$(e "$cfg" | cfg-get-value server-aliases 2>/dev/null) || true
-    [ "$server_aliases" == None ] && server_aliases=""
-    if [ "$server_aliases" ]; then
-        server_aliases=($(echo "$server_aliases" | shyaml get-values)) || return 1
-    else
-        server_aliases=()
-    fi
    compose --debug --add-compose-content "$service_config" crt "$service" \
-            create "$domain" "${server_aliases[@]}" || {
+            create "${domains[@]}" || {
        err "Failed to launch letsencrypt for certificate creation."
        return 1
    }
@ -399,16 +531,16 @@ apache_passwd_file() {

 ## Produce the full statements depending on relation-get informations
 apache_vhost_statement() {
-    local type="$1" protocols="$2" cfg="$3" domain="$4" \
+    local type="$1" protocols="$2" cfg="$3" domains="$4" \
          vhost_statement

    if is_protocol_enabled http "$protocols"; then
-        __vhost_full_vhost_statement "$type" http "$cfg" "$domain" || return 1
+        __vhost_full_vhost_statement "$type" http "$cfg" "$domains" || return 1
    fi
    if is_protocol_enabled https "$protocols"; then
        read-0 ssl_plugin_fun ssl_cfg_value ssl_cfg_options < <(ssl_get_plugin_fun "$cfg") || return 1
-        "$ssl_plugin_fun"_vars "$cfg" "$ssl_cfg_options" "$ssl_cfg_value" "$domain" || return 1
-        vhost_statement=$(__vhost_full_vhost_statement "$type" https "$cfg" "$domain") || return 1
+        "$ssl_plugin_fun"_vars "$cfg" "$ssl_cfg_options" "$ssl_cfg_value" "$domains" || return 1
+        vhost_statement=$(__vhost_full_vhost_statement "$type" https "$cfg" "$domains") || return 1
        cat <<EOF

 <IfModule mod_ssl.c>
@ -421,13 +553,13 @@ export -f apache_vhost_statement


 apache_code_dir() {
-    local cfg="$1" www_data_gid local_path
+    local cfg="$1" service_cfg="$2" www_data_gid local_path
    www_data_gid=$(cached_cmd_on_base_image "$TARGET_SERVICE_NAME" 'id -g www-data') || {
        debug "Failed to query for www-data gid in ${DARKYELLOW}$TARGET_SERVICE_NAME${NORMAL} base image."
        return 1
    }
-    domain=$(get_domain "$cfg") || return 1
-    local_path="/var/www/${domain}"
+    domains=($(get_domains "$cfg" "$service_cfg")) || return 1
+    local_path="/var/www/${domains[0]}"
    host_path=$(e "$cfg" | cfg-get-value location 2>/dev/null) ||
        host_path="$DATASTORE/$BASE_SERVICE_NAME${local_path}"

@ -455,13 +587,13 @@ $SERVICE_NAME:
 }

 apache_data_dirs() {
-    local cfg="$1" data_dirs dst data fdir to_create
+    local cfg="$1" service_cfg="$2" data_dirs dst data fdir to_create
    data_dirs=$(e "$cfg" | cfg-get-value data-dirs 2>/dev/null | shyaml get-values 2>/dev/null) || true
    if [ -z "$data_dirs" ]; then
        return 0
    fi
-    domain=$(get_domain "$cfg") || return 1
-    local_path="/var/www/${domain}"
+    domains=($(get_domains "$cfg" "$service_cfg")) || return 1
+    local_path="/var/www/${domains[0]}"
    dst=$DATASTORE/$BASE_SERVICE_NAME$local_path
    data=()
    while IFS="," read -ra addr; do
@ -577,26 +709,15 @@ EOF


 __vhost_head_statement() {
-    local cfg="$1" protocol="$2" domain="$3" server_aliases admin_mail prefix
+    local cfg="$1" protocol="$2" domains="$3" server_aliases admin_mail prefix
+    domains=($domains)
    admin_mail=$(e "$1" | cfg-get-value "admin-mail" 2>/dev/null) || true
    if [ -z "$admin_mail" ]; then
-        if [ -z "$domain" ]; then
+        if [ "${#domains[@]}" == 0 ]; then
            admin_mail=webmaster@localhost
        else
-            admin_mail=${admin_mail:-contact@$domain}
-        fi
-    fi
-
-    server_aliases=$(e "$cfg" | cfg-get-value server-aliases 2>/dev/null) || true
-    [ "$server_aliases" == None ] && server_aliases=""
-    if [ "$server_aliases" ]; then
-        server_aliases=($(e "$server_aliases" | shyaml get-values)) || return 1
-        if [ -z "$domain" ]; then
-            err "You can't specify server aliases if you don't have a domain."
-            return 1
+            admin_mail=${admin_mail:-contact@${domains[0]}}
        fi
-    else
-        server_aliases=()
    fi

    if [ "$protocol" == "https" ]; then
@ -605,8 +726,8 @@ __vhost_head_statement() {
        prefix=
    fi

-    if [ "$domain" ]; then
-        log_prefix="${prefix}${domain}_"
+    if [ "${#domains[@]}" != 0 ]; then
+        log_prefix="${prefix}${domains[0]}_"
    else
        log_prefix=""
    fi
@ -614,8 +735,8 @@ __vhost_head_statement() {
    cat <<EOF
 $(
  echo "ServerAdmin ${admin_mail}"
-  [ "$domain" ] && echo "ServerName ${domain}"
-  for alias in "${server_aliases[@]}"; do
+  [ "${#domains[@]}" != 0 ] && echo "ServerName ${domains[0]}"
+  for alias in "${domains[@]:1}"; do
      [ "$alias" ] || continue
      echo "ServerAlias $alias"
  done
@ -693,14 +814,15 @@ target-get() {
 }

 __vhost_proxy_statement() {
-    local protocol="$1" cfg="$2" dest="$3" proxy_pass_options target
-
+    local protocol="$1" cfg="$2" domains="$3" proxy_pass_options target
+    domains=($domains)
    target=$(target-get "$cfg") || return 1
    proxy_pass_options=($(e "$cfg" | shyaml -y -q get-value apache-proxy-pass-options | yaml_get_values))
    if [ "${#proxy_pass_options[@]}" == 0 ]; then
        proxy_pass_options=(${proxy_pass_options:-"retry=0"})
    fi
-
+    dest=${domains[0]}
+    dest=${dest:-html}
    cat <<EOF


@ -733,11 +855,12 @@ EOF
 }

 __vhost_full_vhost_statement() {
-    local type="$1" protocol="$2" cfg="$3" domain="$4" head_statement custom_rules content_statement
+    local type="$1" protocol="$2" cfg="$3" domains="$4" head_statement custom_rules content_statement

-    head_statement=$(__vhost_head_statement "$cfg" "$protocol" "$domain") || return 1
+    domains=($domains)
+    head_statement=$(__vhost_head_statement "$cfg" "$protocol" "${domains[*]}") || return 1
    custom_rules=$(__vhost_custom_rules "$cfg") || return 1
-    content_statement=$(__vhost_content_statement "$type" "$protocol" "$cfg" "${domain:-html}") || return 1
+    content_statement=$(__vhost_content_statement "$type" "$protocol" "$cfg" "${domains[*]}") || return 1

    case "$protocol" in
        https)
@ -770,7 +893,10 @@ EOF
 }

 __vhost_publish_dir_statement() {
-    local protocol="$1" cfg="$2" dest="$3" location
+    local protocol="$1" cfg="$2" domains="$3" location
+    domains=($domains)
+    dest=${domains[0]}
+    dest=${dest:-html}
    local_path="/var/www/${dest}"

    cat <<EOF
@ -798,7 +924,13 @@ EOF


 __vhost_tunnel_ssh_statement() {
-    local protocol="$1" cfg="$2" dest="$3" custom_rules content_statement
+    local protocol="$1" cfg="$2" domains="$3" custom_rules content_statement
+    domains=($domains)
+    dest=${domains[0]}
+    if [ "${#domains[@]}" == 0 ]; then
+        err "You must specify a domain for ssh tunnel to work."
+        return 1
+    fi
    cat <<EOF


@ -820,7 +952,7 @@ AllowConnect 22

 ### Accept redirect only to same domain

-<Proxy $domain>
+<Proxy ${domains[0]}>
    Order deny,allow
 $(__vhost_creds_statement "$cfg" "$dest" | prefix "    ")
 </Proxy>
--- a/apache/test/get_domains
+++ b/apache/test/get_domains
@ -0,0 +1,316 @@
+#!/bin/bash
+
+exname=$(basename $0)
+
+compose_core=$(which compose-core) || {
+    echo "Requires compose-core executable to be in \$PATH." >&2
+    exit 1
+}
+
+fetch-def() {
+    local path="$1" fname="$2"
+    ( . "$path" 1>&2 || {
+          echo "Failed to load '$path'." >&2
+          exit 1
+      }
+      declare -f "$fname"
+    )
+}
+
+prefix_cmd="
+. /etc/shlib
+
+include common
+include parse
+
+. ../lib/common
+
+$(fetch-def "$compose_core" yaml_get_values)
+$(fetch-def "$compose_core" yaml_get_interpret)
+
+" || {
+    echo "Couldn't build prefix cmd" >&2
+    exit 1
+}
+
+# mock
+cfg-get-value() {
+    local key="$1"
+    shyaml get-value "$key" 2>/dev/null
+}
+export -f cfg-get-value
+
+yaml_get_interpret() {
+    shyaml get-value
+}
+export -f yaml_get_interpret
+
+
+export state_tmpdir=$(mktemp -d -t tmp.XXXXXXXXXX)
+trap "rm -rf \"$state_tmpdir\"" EXIT
+
+##
+## Tests
+##
+
+try "
+get_domains '
+'"
+is errlvl 1
+is err reg 'Error: .*domain option.*'
+is out ''
+
+
+try "
+get_domains '
+domain: toto
+'"
+noerror
+is out 'toto
+'
+
+
+try "
+get_domains '
+domain: toto titi
+'"
+noerror
+is out 'toto titi
+'
+
+try "
+get_domains '
+domain:
+- toto
+'"
+noerror
+is out 'toto
+'
+
+
+try "
+get_domains '
+server-aliases:
+'"
+is errlvl 1
+is err part 'Error: '
+is err part 'No domain name set'
+
+try "
+get_domains '
+domain:
+server-aliases:
+'"
+is errlvl 1
+is err part 'Error: '
+is err part 'No domain name set'
+
+
+try "
+get_domains '
+domain:
+server-aliases:
+- toto
+'"
+is errlvl 1
+is err part 'Error: '
+is err part "You can't specify server aliases if you don't have a domain"
+
+try "
+get_domains '
+domain: foo
+server-aliases:
+- bar
+'"
+noerror
+is out 'foo bar
+'
+
+
+try "
+get_domains '
+domain: foo
+server-aliases: bar
+'"
+noerror
+is out 'foo bar
+'
+
+
+try "
+get_domains '
+domain:
+- foo
+server-aliases: bar
+'"
+noerror
+is out 'foo bar
+'
+
+try "
+get_domains '
+domain:
+- foo{1,2} bar
+server-aliases: wiz
+'"
+noerror
+is out 'foo1 foo2 bar wiz
+'
+
+try "
+get_domains '
+domain:
+- foo{1,2} bar
+server-aliases: foo1
+'"
+noerror
+is out 'foo1 foo2 bar
+'
+
+try "
+get_domains '
+domain:
+- foo{1,2} bar
+- \"*.zoo\"
+server-aliases: foo1
+'"
+noerror
+is out 'foo1 foo2 bar *.zoo
+'
+
+try "
+get_domains '
+domain: foo+ bar
+'"
+is errlvl 1
+is err part 'Error: '
+is err part 'Invalid domain value'
+
+
+try "
+get_domains '
+domain: 
+' '
+options.service-domain-map:
+'" "empty service-domain-map"
+is errlvl 1
+is err part 'Error: '
+is err part 'No domain name set'
+is err part 'service-domain-map'
+
+
+try "
+BASE_SERVICE_NAME=foo
+get_domains '
+domain: 
+' '
+options:
+  service-domain-map:
+    wiz: bar
+'" "no map matching in service-domain-map"
+is errlvl 1
+is err part 'Error: '
+is err part 'No domain name set'
+is err part 'service-domain-map'
+
+
+try "
+export BASE_SERVICE_NAME=wiz
+get_domains '
+domain: 
+' '
+options:
+  service-domain-map:
+    wiz: bar
+'" "matching map in service-domain-map"
+noerror
+is out 'bar
+'
+
+
+try "
+export BASE_SERVICE_NAME=wiz
+get_domains '
+domain: 
+' '
+options:
+  service-domain-map:
+    wiz?: bar
+    wiz: bar2
+'" "only first matching map in service-domain-map"
+noerror
+is out 'bar
+'
+
+
+try "
+export BASE_SERVICE_NAME=wiz
+get_domains '
+domain: 
+' '
+options:
+  service-domain-map:
+    \"[w]i?zz?\": bar
+'" "map are regex in service-domain-map"
+noerror
+is out 'bar
+'
+
+
+try "
+export BASE_SERVICE_NAME=wiz
+get_domains '
+domain: 
+' '
+options:
+  service-domain-map:
+    (w)i(z): bar\$1\$2
+'" "regex capture in service-domain-map"
+noerror
+is out 'barwz
+'
+
+
+try "
+export BASE_SERVICE_NAME=wiz
+get_domains '
+domain: 
+' '
+options:
+  service-domain-map:
+    .*: \$0.shrubbery
+'" "regex capture 2 in service-domain-map"
+noerror
+is out 'wiz.shrubbery
+'
+
+
+try "
+export BASE_SERVICE_NAME=wiz
+get_domains '
+domain: 
+' '
+options:
+  service-domain-map:
+    .*: \$x
+'" "refuse other variables in service-domain-map"
+is errlvl 1
+is err part 'Error: '
+is err part 'Invalid mapping value'
+
+
+try "
+export BASE_SERVICE_NAME=wiz
+get_domains '
+domain: 
+' '
+options:
+  service-domain-map:
+    .*:
+      - \$0.example.com
+      - my-\$0.domain.org
+
+'" "list is possible as value of service-domain-map"
+noerror
+is out 'wiz.example.com my-wiz.domain.org
+'
--- a/apache/test/vhost
+++ b/apache/test/vhost
@ -107,20 +107,13 @@ is out '<VirtualHost *:80>
 ##

 try "
-apache_vhost_statement publish_dir ,http, '
-server-aliases:
- toto
-' www.example.com"
+apache_vhost_statement publish_dir ,http, '' 'www.example.com toto'"
 noerror
 is out reg 'ServerAlias toto'


 try "
-apache_vhost_statement publish_dir ,http, '
-server-aliases:
- toto
- titi
-' www.example.com"
+apache_vhost_statement publish_dir ,http, '' 'www.example.com toto titi'"
 noerror
 is out reg 'ServerAlias toto'
 is out reg 'ServerAlias titi'
--- a/apache/test/vhost_cert_provider
+++ b/apache/test/vhost_cert_provider
@ -182,7 +182,7 @@ ssl:
  foo: |
    a
    b
-'
+' ''
 " "unknown cert key"
 is errlvl 1
 is err reg 'Error: .*cert-provider.*'