新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch21/docker-images/docker-compose.yml

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+version: "3.7"
+
+services:  
+  ch21-kubeless-cli:
+    image: kiamol/ch21-kubeless-cli
+    build:
+      context: ./kubeless-cli
+
+  ch21-serverless-cli:
+    image: kiamol/ch21-serverless-cli
+    build:
+      context: ./serverless-cli
+
+  ch21-todo-api:
+    image: kiamol/ch21-todo-api
+    build:
+      context: ./todo-api

learn/learn-kubernetes-master/kiamol/ch21/docker-images/kubeless-cli/Dockerfile

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+#using node to match base image for serverless cli
+FROM node:12  
+
+ENV KUBELESS_VERSION="v1.0.7" \
+    KUBERNETES_VERSION="1.18.5" 
+
+RUN curl -LO https://github.com/kubeless/kubeless/releases/download/${KUBELESS_VERSION}/kubeless_linux-amd64.zip && \
+    unzip kubeless_linux-amd64.zip && \
+    rm -f kubeless_linux-amd64.zip && \
+    chmod +x bundles/kubeless_linux-amd64/kubeless && \
+    mv bundles/kubeless_linux-amd64/kubeless /usr/local/bin/
+
+RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/v${KUBERNETES_VERSION}/bin/linux/amd64/kubectl && \
+    chmod +x kubectl && \
+    mv kubectl /usr/local/bin/
+
+COPY start.sh /
+RUN chmod +x /start.sh
+CMD /start.sh
+WORKDIR /kiamol

learn/learn-kubernetes-master/kiamol/ch21/docker-images/kubeless-cli/start.sh

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+#!/bin/sh
+
+# set up access to Kube API
+kubectl config set-cluster default --server=https://kubernetes.default.svc.cluster.local --certificate-authority=/var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+kubectl config set-context default --cluster=default
+kubectl config set-credentials user --token=$(cat /var/run/secrets/kubernetes.io/serviceaccount/token)
+kubectl config set-context default --user=user
+kubectl config use-context default
+
+cd /
+git clone https://github.com/sixeyed/kiamol
+
+while true; do sleep 1000; done

learn/learn-kubernetes-master/kiamol/ch21/docker-images/serverless-cli/Dockerfile

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+FROM node:12
+
+ENV SERVERLESS_VERSION="1.77.1" \
+    KUBERNETES_VERSION="1.18.5" 
+
+RUN npm install -g serverless@${SERVERLESS_VERSION}
+
+RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/v${KUBERNETES_VERSION}/bin/linux/amd64/kubectl && \
+    chmod +x kubectl && \
+    mv kubectl /usr/local/bin/
+
+COPY start.sh /
+RUN chmod +x /start.sh
+CMD /start.sh
+WORKDIR /kiamol

learn/learn-kubernetes-master/kiamol/ch21/docker-images/serverless-cli/start.sh

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+#!/bin/sh
+
+# set up access to Kube API
+kubectl config set-cluster default --server=https://kubernetes.default.svc.cluster.local --certificate-authority=/var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+kubectl config set-context default --cluster=default
+kubectl config set-credentials user --token=$(cat /var/run/secrets/kubernetes.io/serviceaccount/token)
+kubectl config set-context default --user=user
+kubectl config use-context default
+
+cd /
+git clone https://github.com/sixeyed/kiamol
+
+while true; do sleep 1000; done

learn/learn-kubernetes-master/kiamol/ch21/docker-images/todo-api/Dockerfile

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+FROM node:12.17 AS builder
+
+WORKDIR /src
+COPY package.json .
+RUN npm install
+
+FROM node:12.17-alpine3.11
+
+CMD ["node", "/app/server.js"]
+ENV PORT=80
+EXPOSE 80
+
+WORKDIR /app
+COPY --from=builder /src/node_modules/ /app/node_modules/
+COPY *.js ./

learn/learn-kubernetes-master/kiamol/ch21/docker-images/todo-api/handler.js

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+const NATS = require('nats')
+const nc = NATS.connect({url: 'nats://message-queue:4222', json: true})
+const { v4: uuidv4 } = require('uuid');
+
+function post(req, res, next) {
+  console.log('** todo-api handler called');
+
+  var newItemEvent = {
+    Subject: "events.todo.newitem",
+    Item: {
+      Item: Object.keys(req.body)[0],
+      DateAdded: new Date().toISOString()
+    },
+    CorrelationId: uuidv4()
+  }
+
+  nc.publish('events.todo.newitem', newItemEvent)
+  console.log(`** New item published, event ID: ${newItemEvent.CorrelationId}`);
+
+  res.send(201);
+  next();
+}
+
+module.exports = { post }

learn/learn-kubernetes-master/kiamol/ch21/docker-images/todo-api/package.json

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+{
+    "name": "todo-api",
+    "version": "0.1.0",
+    "main": "server.js",
+    "author": "kiamol",
+    "dependencies": {
+      "nats" : "1.4.9",
+      "restify" : "8.5.1",
+      "uuid" : "8.2.0"
+    }
+}
+  

learn/learn-kubernetes-master/kiamol/ch21/docker-images/todo-api/server.js

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+const restify = require("restify");
+const handler = require('./handler');
+
+var server = restify.createServer();
+server.use(restify.plugins.bodyParser());
+server.post("/todos", handler.post);
+
+server.listen(process.env.PORT, function() {
+  console.log(`${server.name} listening at ${server.url}`);
+});