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"name":"simplerest", - "tags":["bdp","nothing","aalto"], - "port": 3000, - "address":"192.168.2.14", - "check": { - "id": "checksimplerest", - "name": "Simple Status", - "args": ["curl","http://localhost:3000/health"], - "interval": "20s", - "timeout": "10s" - } -} + "name": "simplerest", + "tags": [ + "bdp", + "nothing", + "aalto" + ], + "port": 3000, + "address": "192.168.8.106", + "check": { + "id": "checksimplerest", + "name": "Simple Status", + "args": [ + "curl", + "http://192.168.8.106:3000/health" + ], + "interval": "20s", + "timeout": "10s" + } +} \ No newline at end of file diff --git a/tutorials/servicediscovery/README.md b/tutorials/servicediscovery/README.md index 2234be5..0c5aa83 100644 --- a/tutorials/servicediscovery/README.md +++ b/tutorials/servicediscovery/README.md @@ -6,20 +6,23 @@ We use [consul](https://www.consul.io/) for service discovery. >You can also use ZooKeeper and etcd to study. But then you need to adapt the code for them ## Practices + > change the code to fix it into your setting, especially, we have some specific paths/urls in the code ### Running consul + * Make sure that you have consul installed in your machine. * using consul-server.sh to run a consul server for testing ``` -$sh consul-server.sh aaltocs aaltosea /tmp/consul 0.0.0.0 +$bash consul-server.sh aaltocs aaltosea /tmp/consul 0.0.0.0 ``` Meaning that we run a consul server with: * -datacenter=aaltocs: to indicate the data center * -node=aaltosea: to indicate the name of the agent * -data-dir=/tmp/consul: to indicate the place where the data is stored * -bind=0.0.0.0: to indicate the network interface for the internal cluster communication -You should see consul running + +You should see consul running: for example check http://localhost:8500/ ### Run some services @@ -47,5 +50,11 @@ In principle, services will publish their information into consul. We just make ``` the simple_rest.json can be obtained by calling simple_rest **curl -X GET http://localhost:3000/self**. -* check consul service using http://localhost:8500/ui to see if services are alive or not +* check your consul service, e.g., using http://localhost:8500/ui to see if services are alive or not + +You should see consul running: for example check http://localhost:8500/ +![Consul UI: services are up](consului.png) + * start and stop simple_rest.js and mongodb container and then go to the consul UI to see if the services are alive or not + +![Consul UI: simpleret is down](consuluidown.png) \ No newline at end of file diff --git a/tutorials/servicediscovery/consul-server.sh b/tutorials/servicediscovery/consul-server.sh index 97b096e..a02cf17 100644 --- a/tutorials/servicediscovery/consul-server.sh +++ b/tutorials/servicediscovery/consul-server.sh @@ -1,3 +1,3 @@ #!/bin/bash -#example: -datacenter=aaltocs -data-dir=/tmp/consul -bind=0.0.0.0 - +#example: -datacenter=aaltocs -node=cse4640 -data-dir=/tmp/consul -bind=0.0.0.0 - /opt/consul/consul agent -enable-script-checks -datacenter=$1 -node $2 -data-dir=$3 -bind=$4 -server -dev diff --git a/tutorials/servicediscovery/consului.png b/tutorials/servicediscovery/consului.png new file mode 100644 index 0000000..d82f97e Binary files /dev/null and b/tutorials/servicediscovery/consului.png differ diff --git a/tutorials/servicediscovery/consuluidown.png b/tutorials/servicediscovery/consuluidown.png new file mode 100644 index 0000000..354cc5f Binary files /dev/null and b/tutorials/servicediscovery/consuluidown.png differ diff --git a/tutorials/servicediscovery/mongocheck.py b/tutorials/servicediscovery/mongocheck.py index ff5072a..ae73a79 100755 --- a/tutorials/servicediscovery/mongocheck.py +++ b/tutorials/servicediscovery/mongocheck.py @@ -1,10 +1,16 @@ #!/usr/bin/python3 +import argparse from pymongo import MongoClient import sys -## Just hardcode -client = MongoClient(sys.argv[1]) -result=client.db_name.command('ping') -if result is None: - print("Problem") - sys.exit(2) -sys.exit (0) + +if __name__ == "__main__": + parser = argparse.ArgumentParser() + parser.add_argument('--service_url', default='mongodb://localhost:27017',help='URL of the server') + args = parser.parse_args() + url =args.service_url + if url: + client = MongoClient(url) + result=client.db_name.command('ping') + if result is None: + print("Problem") + sys.exit(2) diff --git a/tutorials/servicediscovery/mongoservice.json b/tutorials/servicediscovery/mongoservice.json index 2822b15..d591bce 100644 --- a/tutorials/servicediscovery/mongoservice.json +++ b/tutorials/servicediscovery/mongoservice.json @@ -2,11 +2,11 @@ "name":"mongodb", "tags":["bdp","sensordata","aalto"], "port": 27017, - "address":"192.168.0.14", + "address":"192.168.8.106", "check": { "id": "checkmongdo", "name": "Mongodb Status", - "args": ["/home/truong/myprojects/mygit/cs-e4640/tutorials/servicediscovery/mongocheck.py","mongodb://192.168.0.14:27017"], + "args": ["/home/truong/myprojects/mygit/bigdataplatforms/tutorials/servicediscovery/mongocheck.py","--service_url", "mongodb://192.168.8.106:27017"], "interval": "20s", "timeout": "5s" }