envoy | Cloud-native high-performance edge/middle/service proxy | Microservice library
kandi X-RAY | envoy Summary
kandi X-RAY | envoy Summary
Envoy is hosted by the Cloud Native Computing Foundation (CNCF). If you are a company that wants to help shape the evolution of technologies that are container-packaged, dynamically-scheduled and microservices-oriented, consider joining the CNCF. For details about who's involved and how Envoy plays a role, read the CNCF announcement.
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QUESTION
I am trying to upload a file but I can't do it. I got a name for my file in database but I don't have the file in my file folder. When I am doing a console.log(req.file), I got an "undefined" I don't know what I'm missing I am using node.js, mySql (sequelize). React in front
app.js
...ANSWER
Answered 2022-Apr-01 at 20:23You need to send the actual file rather than just the name of the file. The server will not be able to access the file from a user's computer by its name.
To send a file in a post request, you also need to change the content type of the request to one that Multer expects.
QUESTION
"Open Policy agent" & "Knative" each provide a tutorial for integration with "Istio". There's a lighter alternative to "Istio" : "Kourier" that requiring fewer resources.
Is there's a way to integrate "Open Policy agent" with "Kourier" ?
"Istio" & "Kourier" use envoy (proxy).
I am a newbie on "Kubernet" any help is welcome ^_^
WCDR
...ANSWER
Answered 2022-Mar-19 at 20:49I'm not sure what you're going to use OPA for here; if you're trying to constrain the types of resources which can be created, OPA + gatekeeper should work fine, though kourier only implements an internal-to-Knative interface, so you might not get as much mileage out of the integration.
If you're trying to use OPA to govern or restrict actual HTTP requests to the workload, kourier doesn't have that capability out of the box (on purpose). You could fork it and add the functionality, but at that point it might be easier just to run Istio in non-mesh mode.
QUESTION
I would like to do a form with select. I use hooks and I use react-select for this.
My problems: The field select doesn't show the default value. When I select value the field don't show it. When I click on submit button, no value are send.
I don't understand why, could someone help me please?
This is my code:
...ANSWER
Answered 2022-Mar-11 at 23:05You're setting the Select
value to form.natureOfTheRequest
, so you need to update that specific field on its onChange
callback, rather than simply passing setForm
.
The callback could look like the following.
QUESTION
Below references to questions that have helped me get this far:
- How to print out a dictionary nicely in Python?
- how to indent multiline message printed by python logger?
- Python requests - print entire http request (raw)?
- Log all requests from the python-requests module
I currently have this:
...ANSWER
Answered 2022-Feb-04 at 14:57Though it seems a bit fragile, it looks like you can slightly adjust the indentation then use the re
package to strip out the unwanted spacing between the leading and closing curly braces.
QUESTION
I am working on Federated Learning experiments using Intel OpenFL. I want to distribute my dataset (MNIST) using different non-iidness scenarios. I am following their official documentation: https://openfl.readthedocs.io/en/latest/source/utilities/splitters_data.html
This is my original working code:
...ANSWER
Answered 2022-Mar-01 at 08:01The only solution I found until now is to reduce the rank of each envoy:
train_idx = train_splitter.split(self.y, self.worldsize)[self.rank-1]
QUESTION
There has been other questions on the subject, but nothing seems working for me.
I have a functional CURL, but I want to translate to JS (with Node).
ANSWER
Answered 2022-Feb-19 at 13:04You need to specify that it's a digest:
QUESTION
I'm trying to make EnvoyFilters work in my installation. For test purposes I'm trying to set lua filter that logs dumb message and adds header to the resonse.
Here's my configuration:
...ANSWER
Answered 2021-Oct-19 at 20:42The problem is your todo #TODO: Understand name compose logic
. You need to set this name value to the name of the route of the VirtualService
. Also you need to use a typed_per_filter_config
with a type LuaPerRoute
.
If your VirtualService
looks something like that:
QUESTION
I am following this guide.
Ingress requests are getting logged. Egress traffic control is working as expected, except I am unable to log egress HTTP requests. What is missing?
...ANSWER
Answered 2022-Feb-07 at 17:14AFAIK istio collects only ingress HTTP logs by default.
In the istio documentation there is an old article (from 2018) describing how to enable egress traffic HTTP logs.
Please keep in mind that some of the information may be outdated, however I believe this is the part that you are missing.
QUESTION
Within a T-SQL script I am calling a stored procedure, this stored procedure handles HTTP requests and is returning stuff like HTTP status code, status text and response headers.
The stored procedure is an 3rd party managed/created SP which I cannot edit (because when the vendor is updating their application the SP will be overwritten). So I have to deal with the output of the SP.
The response header which I am receiving after the HTTP call is made is a full string of all the headers (seperated by two spaces ' ').
This is the response header:
...ANSWER
Answered 2022-Feb-10 at 17:46This is quite easy. Grab a copy of delimitedSplit8k. It returns the item and it's ordinal position in the string. And it's fast.
QUESTION
We are using envoy access logs https://www.envoyproxy.io/docs/envoy/latest/configuration/observability/access_log/usage , does envoy validate the fields that are passed to the access logs, e.g. the field format.
I ask it from basic security reason to verify that if I use for example %REQ(:METHOD)
I will get a real http method like get
post
etc and not something like foo
. or [%START_TIME%]
is in time format and I will not get something else...
I think it's related to this envoy code
I ask it since we are sending the data from the access logs to another system and we want to verify that the data is as its defined in the access logs and no one will change it from security perspective.
like ip
is real ip format and path
is in path format and url
is in url format
ANSWER
Answered 2022-Feb-02 at 09:54I'm not sure I understand the question. Envoy doesn't have to validate anything as it is generating those logs. Envoy is HTTP proxy who receives the request and does some routing/rewriting/auth/drop/.. actions based on the configuration (configured by virtualservice / destinationrule / envoyfilter if we're talking about istio). After the action it generates the log entry and fills the fields with details about original request and actions taken.
Also there is nothing like 'real' http method. HTTP method is just a string and it can hold any value. Envoy is just the proxy who sits between client and application and passes the requests (unless you explicitly configure it i.e. drop some method).
It depends on application who receives the method how it's treated. GET/POST/HEAD are commonly associated with standard HTTP and static pages. PUT/DELETE/PATCH are used in REST APIs. But nothing prevents you to develop application who will accept 'FOOBAR' method and runs some code over it.
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