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Migrate T-CaaS network resources to the Sylva network connector API

Recipe IDio.moderne.kubernetes.sylva.migrate.dasschiff.MigrateTCaasToSylvaNetworkConnector
Artifactorg.openrewrite.recipe:rewrite-kubernetes

Move what can be moved without a decision from Das Schiff's low level network.t-caas.telekom.com group onto the network-connector.sylvaproject.org intent group. Four of the eight legacy kinds move: VRFRouteConfiguration and Layer2NetworkConfiguration together rather than one at a time, because a VRF whose attachment stays behind stops advertising that attachment's subnet, and MirrorTarget and MirrorSelector likewise, because a selector without its collector points at nothing. BGPPeering is report-only. NodeNetworkConfig, NodeNetplanConfig and NetworkConfigRevision are operator output rather than input — the first two are named after a node and owned by it, the third by a hash of its own spec — so their absence is not a gap.

Composite recipeOpenRewritekubernetestelekomModerne Proprietary License
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Definition​

Recipes3

Examples​

yaml
Before
apiVersion: network.t-caas.telekom.com/v1alpha1
kind: VRFRouteConfiguration
metadata:
  name: m2m-test-vrf
spec:
  import: []
  export: []
  seq: 10
  vrf: m2m
  vni: 2002026
  routeTarget: 65188:2026
---
apiVersion: network.t-caas.telekom.com/v1alpha1
kind: Layer2NetworkConfiguration
metadata:
  name: gw-vlan-m2m
spec:
  id: 601
  mtu: 1500
  vni: 5000002
  vrf: m2m
---
apiVersion: network.t-caas.telekom.com/v1alpha1
kind: BGPPeering
metadata:
  name: peering
spec:
  peeringVlan:
    name: gw-vlan-m2m
  remoteASN: 65100
  enableBFD: false
  import: []
  export:
    - action: permit
      cidr: 10.102.0.0/24
After
apiVersion: network-connector.sylvaproject.org/v1alpha1
kind: VRF
metadata:
  name: m2m-test-vrf
spec:
  vrf: "m2m"
  vni: 2002026
  routeTarget: "65188:2026"
---
apiVersion: network-connector.sylvaproject.org/v1alpha1
kind: Destination
metadata:
  name: m2m-test-vrf
  labels:
    network-connector.sylvaproject.org/vrf: "m2m"
spec:
  vrfRef: "m2m-test-vrf"
---
apiVersion: network-connector.sylvaproject.org/v1alpha1
kind: Network
metadata:
  name: gw-vlan-m2m
spec:
  vlan: 601
  vni: 5000002
---
apiVersion: network-connector.sylvaproject.org/v1alpha1
kind: Layer2Attachment
metadata:
  name: gw-vlan-m2m
spec:
  networkRef: "gw-vlan-m2m"
  mtu: 1500
  disableAnycast: true
  destinations:
    matchLabels:
      network-connector.sylvaproject.org/vrf: "m2m"
---
apiVersion: network.t-caas.telekom.com/v1alpha1
kind: BGPPeering
metadata:
  name: peering
spec:
  peeringVlan:
    name: gw-vlan-m2m
  remoteASN: 65100
  enableBFD: false
  import: []
  export:
    - action: permit
      cidr: 10.102.0.0/24
yaml
Before
apiVersion: network.t-caas.telekom.com/v1alpha1
kind: VRFRouteConfiguration
metadata:
  name: m2m-test-vrf
spec:
  import: []
  export: []
  seq: 10
  vrf: m2m
  vni: 2002026
  routeTarget: 65188:2026
---
apiVersion: network.t-caas.telekom.com/v1alpha1
kind: Layer2NetworkConfiguration
metadata:
  name: gw-vlan-m2m
spec:
  id: 601
  mtu: 1500
  vni: 5000002
  vrf: m2m
---
apiVersion: network.t-caas.telekom.com/v1alpha1
kind: BGPPeering
metadata:
  name: peering
spec:
  peeringVlan:
    name: gw-vlan-m2m
  remoteASN: 65100
  enableBFD: false
  import: []
  export:
    - action: permit
      cidr: 10.102.0.0/24
After
apiVersion: network-connector.sylvaproject.org/v1alpha1
kind: VRF
metadata:
  name: m2m-test-vrf
spec:
  vrf: "m2m"
  vni: 2002026
  routeTarget: "65188:2026"
---
apiVersion: network-connector.sylvaproject.org/v1alpha1
kind: Destination
metadata:
  name: m2m-test-vrf
  labels:
    network-connector.sylvaproject.org/vrf: "m2m"
spec:
  vrfRef: "m2m-test-vrf"
---
apiVersion: network-connector.sylvaproject.org/v1alpha1
kind: Network
metadata:
  name: gw-vlan-m2m
spec:
  vlan: 601
  vni: 5000002
---
apiVersion: network-connector.sylvaproject.org/v1alpha1
kind: Layer2Attachment
metadata:
  name: gw-vlan-m2m
spec:
  networkRef: "gw-vlan-m2m"
  mtu: 1500
  disableAnycast: true
  destinations:
    matchLabels:
      network-connector.sylvaproject.org/vrf: "m2m"
---
apiVersion: network.t-caas.telekom.com/v1alpha1
kind: BGPPeering
metadata:
  name: peering
spec:
  peeringVlan:
    name: gw-vlan-m2m
  remoteASN: 65100
  enableBFD: false
  import: []
  export:
    - action: permit
      cidr: 10.102.0.0/24

Usage​

Run this recipe

This recipe has no required configuration options. Users of Moderne can run it via the Moderne CLI.

You will need to have configured the Moderne CLI on your machine before you can run the following command.

shell
mod run . --recipe MigrateTCaasToSylvaNetworkConnector

If the recipe is not available locally, then you can install it using:

RELEASE resolves to the newest release and LATEST to the newest build of any kind, including snapshots. Either one lets mod config recipes upgrade pull in later versions without editing this command; a pinned version stays where you put it.

mod config recipes jar install org.openrewrite.recipe:rewrite-kubernetes:RELEASE

Data tables​

Low level network configurations
io.moderne.kubernetes.sylva.migrate.dasschiff.table.LowLevelNetworkConfigs

Deutsche Telekom network.t-caas.telekom.com resources that the network-connector.sylvaproject.org intent group replaces, and whether each one can be moved mechanically.

ColumnDescription
Source pathThe path to the manifest.
KindThe legacy kind.
NameThe metadata.name of the legacy resource.
VRFThe VRF the resource declares or attaches to, empty when it names none.
Migrationautomatic when io.moderne.kubernetes.sylva.MigrateLowLevelNetworkConfigToIntent rewrites this resource, manual otherwise.
Intent kindsThe intent resources it becomes, empty when it has to be moved by hand.
DetailWhy the resource cannot be moved mechanically, empty when it can.
Manual follow-upLegacy fields with no intent field to hold them, which the operator derives or assigns instead. Empty when the move loses nothing.
Traffic mirror configurations
io.moderne.kubernetes.sylva.migrate.dasschiff.table.MirrorConfigs

Deutsche Telekom MirrorTarget and MirrorSelector resources that the network-connector.sylvaproject.org Collector and TrafficMirror replace, and whether each one can be moved mechanically.

ColumnDescription
Source pathThe path to the manifest.
KindThe legacy kind.
NameThe metadata.name of the legacy resource.
ReferenceThe VRF a MirrorTarget tunnels through, or the MirrorTarget a MirrorSelector sends to. Empty when it names none.
Migrationautomatic when io.moderne.kubernetes.sylva.migrate.dasschiff.MigrateMirrorConfigToIntent rewrites this resource, manual otherwise.
Intent kindsThe intent resource it becomes, empty when it has to be moved by hand.
DetailWhy the resource cannot be moved mechanically, empty when it can.
Manual follow-upWhat still has to be done by hand once the resource has moved, which is mostly the resources it names that the intent group has not generated yet. Empty when the move leaves nothing behind.
Source files that had results
org.openrewrite.table.SourcesFileResults

Source files that were modified by the recipe run.

ColumnDescription
Source path before the runThe source path of the file before the run. null when a source file was created during the run.
Source path after the runA recipe may modify the source path. This is the path after the run. null when a source file was deleted during the run.
Parent of the recipe that made changesIn a hierarchical recipe, the parent of the recipe that made a change. Empty if this is the root of a hierarchy or if the recipe is not hierarchical at all.
Recipe that made changesThe specific recipe that made a change.
Estimated time savingAn estimated effort that a developer to fix manually instead of using this recipe, in unit of seconds.
CycleThe recipe cycle in which the change was made.
Source files that had search results
org.openrewrite.table.SearchResults

Search results that were found during the recipe run.

ColumnDescription
Source path of search result before the runThe source path of the file with the search result markers present.
Source path of search result after run the runA recipe may modify the source path. This is the path after the run. null when a source file was deleted during the run.
ResultThe trimmed printed tree of the LST element that the marker is attached to.
DescriptionThe content of the description of the marker.
Recipe that added the search markerThe specific recipe that added the Search marker.
Source files that errored on a recipe
org.openrewrite.table.SourcesFileErrors

The details of all errors produced by a recipe run.

ColumnDescription
Source pathThe file that failed to parse.
Recipe that made changesThe specific recipe that made a change.
Stack traceThe stack trace of the failure.
Recipe performance
org.openrewrite.table.RecipeRunStats

Statistics used in analyzing the performance of recipes.

ColumnDescription
The recipeThe recipe whose stats are being measured both individually and cumulatively.
Source file countThe number of source files the recipe ran over.
Source file changed countThe number of source files which were changed in the recipe run. Includes files created, deleted, and edited.
Cumulative scanning time (ns)The total time spent across the scanning phase of this recipe.
Max scanning time (ns)The max time scanning any one source file.
Cumulative edit time (ns)The total time spent across the editing phase of this recipe.
Max edit time (ns)The max time editing any one source file.