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Questions tagged [fiware]

FIWARE is an open cloud-based infrastructure for creation and delivery of Internet applications and services.

FIWARE API specifications are public and royalty-free, driven by the development of an open source reference implementation which accelerates the availability of products and services.

Creation of a sustainable innovation ecosystem around FIWARE is materialized through FIWARE Lab, a working instance of FIWARE enabling free experimentation with the technology.

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yum error "Cannot retrieve metalink for repository: epel. Please verify its path and try again" updating ContextBroker

I'm trying to update Orion ContextBroker using the command yum install contextBroker. Unfortunatelly I get the following error: Loaded plugins: fastestmirror, refresh-packagekit, security Loading mirror speeds from cached hostfile Error: Cannot…
JosepB
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axios.post results in Bad request - grant_type:'client_credentials'

My axios POST method is not working fine. While the call syntax appears to be correct, I guess there is somewhat deep-rooted issue in my specific case. I am trying to get access token using grant_type=client_credentials, using a POST request to…
Kartik Javali
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How can I Read and Transfer chunks of file with Hadoop WebHDFS?

I need to transfer big files (at least 14MB) from the Cosmos instance of the FIWARE Lab to my backend. I used the Spring RestTemplate as a client interface for the Hadoop WebHDFS REST API described here but I run into an IO Exception: Exception in…
Andrea Sassi
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MongoDb: Aggregation using Groovy language

Iam using groovy scripting under SpagoBI. I want to use aggregation. I want for example to execute the following aggregation: db.myCollection.aggregate( [ { $group : { _id : { day: { $dayOfMonth: "$recvTime" } } …
sabrina2020
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How to configure access control in Orion NGSI API for tenant isolation using Wilma PEP Proxy and IdM Keyrock?

I want to provide access control at the Orion Context Broker NGSI API level to ensure real data isolation. I want to make sure that a tenant can only query/update their contexts and NOT those of another tenant. To do so, I started putting an…
Emiliano Viotti
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Fiware - Orion Context Broker subscription not sent to STH, "conditions was supposed to be an array"

When trying to use STH to be able to store and retrieve data sent to OCB, I have a problem making the subscription. My problem is that the subscription creation goes well. When I create the subscription as following: POST /v1/contextSubscriptions…
lukas
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Orion Context Broker delivery guarantees?

Thinking of 'production' usage of Orion Context Broker, I wonder what kind of guarantees are provided by the Orion Context Broker in terms of delivery of messages -- both from producer and consumer perspective? In particular, keeping in mind various…
Alex Glikson
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Fiware: No observation attributes in Orion CB when registered/sent via IDAS UltraLight

This question is very similar to Missing attributes on Orion CB Entity when registering device through IDAS but found no definitive answer there. I have been trying FiWare to get UL2.0 via IDAS to the Orion CB working in the Fiware-Lab env: using…
Just van den Broecke
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How to scale Orion GE?

I have deployed an Orion instance in FILAB and I have configured the Cygnus inyector in order to store information in Cosmos. But...let us imagine a scenario in which the number of entities increases drastically. In this hypothetical scenario one…
Ramón Martínez Carreras
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Filter by attribute value in Orion Context Broker 0.23.0

In current version of Orion Context Broker, 0.23.0, one of the new added features is that it supports filtering entities according to attribute values (NGSI v2). I am currently executing GET operations as indicated in…
juanba1984
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OAuth2 access to Cosmos' WebHDFS in FIWARE Lab

I've recently seen the access to Cosmos' WebHDFS in FIWARE Lab has been protected with OAuth2. I know I have to add a OAuth2 token to the request in order to continue using WebHDFS, but: How can I get the token? How the token is added to the…
Germán Toro del Valle
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How to make rush work with my orionInstance

Following my previous question How to show an entity from OrionContextBroker in the MapViewer widget I configured my context broker instance using Rush and I am using https://ngsiproxy.lab.fi-ware.org as NGSI proxy. I start the…
José Castillo Lema
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Unable to run Cygnus with MySQL agent

I am trying to setup and understand Cygnus. But I am facing issue during installation. I followed below given steps. Install Cygnus using Docker (docker run -d -p 5050:5050 -p 8081:8081 fiware/cygnus-common) Executed version command (curl…
Krishan Babbar
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How to create advanced subscriptions expression at Orion Context Broker NGSIv2?

According to official documentation of Orion Context Broker NGSIv2 : You can include filtering expressions in conditions. For example, to get notified not only if pressure changes, but if it changes within the range 700-800. This is an advanced…
LeonanCarvalho
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IoT Agent LWM2M Memory exhaust and production environment

I'm working on a project which aims to connect +1k devices to a machine, which may probably autoscale. The problem is that with only 2 connected devices, the IDAS IoTAgent ends in a couple of days with a "Memory exhaust" message. It is running in a…
JoseBenitez
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