feat(cardano-node): support custom mithril image overrides

Adds support for specifying a dedicated image, tag, and pullPolicy for the mithril-snapshot initContainer.

Sets default to unstable (0.13.19+) due to GCS closed-channel stream bug.

Note: The built-in mithril-client v0.13.9 in ghcr.io/blinklabs-io/cardano-node:11.0.1-1 has a closed-channel stream race condition bug on GCS (Download: could not write 0 bytes to stream). Suggest using ghcr.io/input-output-hk/mithril-client:latest-unstable (or v2617.0+).

Author: verbotenj

charts/cardano-node/Chart.yaml

@@ -1,8 +1,8 @@
 apiVersion: v2
 name: cardano-node
 description: Creates a Cardano node deployment with SOCAT sidecar
-version: 0.8.5
-appVersion: 10.5.3
+version: 0.8.6
+appVersion: 11.0.1
 maintainers:
   - name: aurora
     email: aurora@blinklabs.io

charts/cardano-node/templates/statefulset.yaml

@@ -34,8 +34,8 @@ spec:
       initContainers:
       # Download Cardano snapshot using mithril-client
       - name: mithril-snapshot
-        image: {{ .Values.image.repository }}:{{ .Values.image.tag }}
-        imagePullPolicy: {{ .Values.image.pullPolicy }}
+        image: {{ .Values.mithril.image.repository }}:{{ .Values.mithril.image.tag }}
+        imagePullPolicy: {{ .Values.mithril.image.pullPolicy }}
         command: ["/bin/sh", "-c"]
         args:
           - |

charts/cardano-node/values.yaml

@@ -5,7 +5,7 @@ cardano_network: preview
 # extraPodLabels: {}
 image:
   repository: ghcr.io/blinklabs-io/cardano-node
-  tag: 10.5.3
+  tag: 11.0.1-1
   pullPolicy: IfNotPresent
 replicaCount: 1
 resources: {}
@@ -27,9 +27,11 @@ service:
 
 # Mithril snapshot restoration via initContainer
 mithril:
-  # Enable Mithril snapshot download via initContainer (recommended)
-  # Runs mithril-client in initContainer before the main cardano-node container starts
   enabled: true
+  image:
+    repository: "ghcr.io/input-output-hk/mithril-client"
+    tag: "latest-unstable"
+    pullPolicy: "IfNotPresent"
   # Genesis and ancillary keys - read from image config files by default
   # These are fallbacks if /opt/cardano/config/{network}/*.vkey files don't exist
   genesisVerificationKey: ""  # Optional: fallback if image doesn't have genesis.vkey