working parsing

example.yml

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+version: "3.2"
+
+services:
+    teamspeak:
+        image: docker.io/teamspeak
+        deploy:
+            replicas: 1
+            placement:
+                constraints: [node.labels.gluster == true]
+        depends_on:
+            - mariadb
+        environment:
+            - TS3SERVER_DB_PLUGIN=ts3db_mariadb
+            - TS3SERVER_DB_SQLCREATEPATH=create_mariadb
+            - TS3SERVER_DB_HOST=mariadb
+            - TS3SERVER_DB_USER=teamspeak
+            - TS3SERVER_DB_NAME=teamspeak
+            - TS3SERVER_LICENSE=accept
+        ports:
+            - target: 9987
+              published: "145.239.119.128:42842"
+              protocol: udp
+              mode: ingress
+            - target: 30033
+              mode: ingress
+        volumes:
+            - "/gluster/docker/gamemodeon-teamspeak_teamspeak/var/ts3server/:/var/ts3server/"
+        networks:
+            - database
+            - teamspeak
+    mariadb:
+        image: docker.io/mariadb
+        deploy:
+            replicas: 1
+            placement:
+                constraints: [node.hostname == stan.lubi.link]
+        environment:
+            - MYSQL_USER=teamspeak
+            - MYSQL_DATABASE=teamspeak
+            - MYSQL_RANDOM_ROOT_PASSWORD=yes
+        volumes:
+            - "/mnt/gamemodeon-teamspeak_mariadb/var/lib/mysql/:/var/lib/mysql/"
+        networks:
+            - database
+    synapse:
+        image: matrixdotorg/synapse
+        deploy:
+            replicas: 1
+            placement:
+                constraints: [node.labels.gluster == true]
+        depends_on:
+            - postgres
+        environment:
+            - SYNAPSE_CONFIG_PATH=/data/homeserver.yaml
+        volumes:
+            - "/gluster/docker/imninja_synapse/data/:/data/"
+        ports:
+            - "145.239.119.128:8448:8448"
+            - "145.239.119.128:42933:443"
+        networks:
+            - homeserver
+            - database
+            - lubiland-lb

expose_forwards.ps1

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+#Requires -Modules powershell-yaml
+$ErrorActionPreference = 'Stop'
+
+foreach($yaml in (Get-ChildItem -Filter '*.yml')) {
+    Write-Output ('Processing {0}' -f $yaml)
+    $definition = Get-Content -Path $yaml -Raw | ConvertFrom-Yaml
+
+    foreach($port in $definition.services.Values.ports) {
+        $nat = @{
+            protocol = $null
+            public_ip = $null
+            public_port = $null
+            internal_port = $null
+        }
+
+        if($port.Count -eq 4) {
+            #long form
+            $published_splitted = $port.published -split ':'
+
+            $nat.protocol = $port.protocol
+            $nat.public_ip = $published_splitted[0]
+            $nat.public_port = $port.target
+            $nat.internal_port = $published_splitted[1]
+        } else {
+            #short form
+            $ports_splitted = $port -split ':'
+
+            $nat.public_ip = $ports_splitted[0]
+            $nat.public_port = $ports_splitted[2]
+            $nat.internal_port = $ports_splitted[1]
+        }
+
+        if(!$nat.protocol) {
+            #this is also Docker's default
+            $nat.protocol = 'tcp'
+        }
+        if($nat.Values -contains $null) {
+            #if $nat doesn't conatain all needed attributes skip the port
+            $error_message = 'Skipping port, because $nat contains $null: {0}' `
+                             -f ($nat | ConvertTo-Json)
+            Write-Error -Message $error_message `
+                        -ErrorAction Continue
+            continue
+        }
+
+        if($nat.internal_port -ne $nat.public_port) {
+            Write-Output ('Additional NAT rule required, because published {0} and target {1} differ' `
+                          -f $nat.internal_port,$nat.public_port)
+            $nat.protocol
+            $nat.public_ip
+            $nat.public_port
+            $nat.internal_port
+        }
+    }
+}