MongoDB数据迁移

1、Create replication instance

spring boot 连接配置
1、首先生产jks文件

新建一个shell脚本 makejks.sh，将一下代码拷贝到makejks.sh文件

mydir=/tmp/certs
truststore=${mydir}/rds-truststore.jks
storepassword=123456

curl -sS "https://s3.amazonaws.com/rds-downloads/rds-combined-ca-bundle.pem" > ${mydir}/rds-combined-ca-bundle.pem
awk 'split_after == 1 {n++;split_after=0} /-----END CERTIFICATE-----/ {split_after=1}{print > "rds-ca-" n ".pem"}' < ${mydir}/rds-combined-ca-bundle.pem

for CERT in rds-ca-*; do
  alias=$(openssl x509 -noout -text -in $CERT | perl -ne 'next unless /Subject:/; s/.*(CN=|CN = )//; print')
  echo "Importing $alias"
  keytool -import -file ${CERT} -alias "${alias}" -storepass ${storepassword} -keystore ${truststore} -noprompt
  rm $CERT
done

rm ${mydir}/rds-combined-ca-bundle.pem

echo "Trust store content is: "

keytool -list -v -keystore "$truststore" -storepass ${storepassword} | grep Alias | cut -d " " -f3- | while read alias 
do
   expiry=`keytool -list -v -keystore "$truststore" -storepass ${storepassword} -alias "${alias}" | grep Valid | perl -ne 'if(/until: (.*?)\n/) { print "$1\n"; }'`
   echo " Certificate ${alias} expires in '$expiry'" 
done

说明：/tmp/certs 是存放生成的rds-truststore.jks文件的目录，连接到Amazon DocumentDb需要使用该文件

非spring boot项目使用

package com.example.documentdb;

import com.mongodb.MongoClient;
import com.mongodb.MongoClientURI;
import com.mongodb.ServerAddress;
import com.mongodb.MongoException;
import com.mongodb.client.MongoCursor;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.MongoCollection;
import org.bson.Document;


public final class Main {
    private Main() {
    }
    public static void main(String[] args) {

        String template = "mongodb://%s:%s@%s/sample-database?ssl=true&replicaSet=rs0&readpreference=%s";
        String username = "";
        String password = "";
        String clusterEndpoint = "sample-cluster.node.us-east-1.docdb.amazonaws.com:27017";
        String readPreference = "secondaryPreferred";
        String connectionString = String.format(template, username, password, clusterEndpoint, readPreference);

        String truststore = "";
        String truststorePassword = "";

        System.setProperty("javax.net.ssl.trustStore", truststore);
        System.setProperty("javax.net.ssl.trustStorePassword", truststorePassword);

        MongoClientURI clientURI = new MongoClientURI(connectionString);
        MongoClient mongoClient = new MongoClient(clientURI);

        MongoDatabase testDB = mongoClient.getDatabase("sample-database");
        MongoCollection numbersCollection = testDB.getCollection("sample-collection");

        Document doc = new Document("name", "pi").append("value", 3.14159);
        numbersCollection.insertOne(doc);

        MongoCursor cursor = numbersCollection.find().iterator();
        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next().toJson());
            }
        } finally {
            cursor.close();
        }

    }
}
                            

说明： System.setProperty("javax.net.ssl.trustStore", truststore);

    System.setProperty("javax.net.ssl.trustStorePassword", truststorePassword);
    这个两行代码就是将秘密放进系统环境变量中，在spring boot项目只需要写在配置文件或者启动命令中即可。