Merge pull request Alethio#69 from marlowl/master

Kubernetes manifest files for ethereum-lite-explorer

.kubernetes/configmap.yaml

@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: lite-explorer
+data:
+  config.json: |-
+    CONFIG_JSON

.kubernetes/deploy.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+set -e
+
+# Get config.json contents based on first program arg or default then escape special chars for sed replacements string then indent all lines with 4 spaces to align with output yaml
+config_json=$(cat ${1:-"../config.default.json"} | sed 's:[\/&]:\\&:g;$!s/$/\\/' | sed 's/^/    /')
+
+# Replace the placeholder from input yaml file and write a new one
+cat configmap.yaml | sed "s/    CONFIG_JSON/$config_json/" > configmap.generated.yaml
+
+kubectl apply -f configmap.generated.yaml
+kubectl apply -f explorer-deployment.yaml
+kubectl apply -f explorer-service.yaml
+
+# Clean up
+rm configmap.generated.*

.kubernetes/explorer-deployment.yaml

@@ -0,0 +1,35 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: lite-explorer
+  labels:
+    app: lite-explorer
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: lite-explorer
+  template:
+    metadata:
+      # Optional, if this'd be wrapped in a helm chart it can be generated as the SHA256 of the configmap
+      # to pod rolling updates reloads on configmap change
+      annotations:
+        checksum/config: 6733181240aa3db87503350771fb19fcaef0707e209928165a9cc7e3e3050781
+      labels:
+        app: lite-explorer
+    spec:
+      containers:
+        - image: alethio/ethereum-lite-explorer
+          imagePullPolicy: Always
+          name: app
+          ports:
+          - containerPort: 80
+            name: http
+          volumeMounts:
+          - mountPath: /usr/share/nginx/html/config.json
+            name: config
+            subPath: config.json
+      volumes:
+        - configMap:
+            name: lite-explorer
+          name: config

.kubernetes/explorer-service.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: lite-explorer
+spec:
+  type: ClusterIP
+  ports:
+    - port: 80
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    app: lite-explorer

.kubernetes/remove.sh

@@ -0,0 +1,3 @@
+kubectl delete configmap lite-explorer
+kubectl delete -f explorer-deployment.yaml
+kubectl delete -f explorer-service.yaml

README.md

@@ -21,6 +21,7 @@ No need for servers, hosting or trusting any third parties to display chain data
     - [Prerequisites](#prerequisites)
     - [Configuration](#configuration)
     - [Running in Docker](#running-in-docker)
+    - [Running in Kubernetes](#running-in-kubernetes)
     - [Building from source](#building-from-source)
         - [Deploying the built assets to production](#deploying-the-built-assets-to-production)
         - [Custom build arguments](#custom-build-arguments)
@@ -128,6 +129,13 @@ If more customization is needed, a full configuration file can be mounted in the
 ```sh
 $ docker run -p 80:80 -v /your-config-dir/config.json:/usr/share/nginx/html/config.json alethio/ethereum-lite-explorer
 ```
+### Running in Kubernetes
+You can deploy the Lite Explorer in Kubernetes using the following steps:
+- `cd .kubernetes`
+- Run `./deploy.sh` to deploy, uses `config.default.json` as config.
+- Use for example `./deploy.sh ../config.memento.json` to select other config files.
+- Run `./remove.sh` to remove
+
 
 ### Building from source
 Clone the explorer in a folder of your choosing