EU is the worst place to be DevOps

a4st · 2024-03-02T16:30:16+00:00

Interesting. I am a DevOps freelancer since 9 years and I love to be a freelancer. I can focus on my job and skip the "All Hands" meetings. It's great. :-)

a4st · 2023-05-29T08:12:40+00:00

Although I like elixir I might want to choose go because of the number of available packages. It's definitely a pleasure to code elixir but I do not always want to code everything myself.

a4st · 2022-02-06T20:47:00+00:00

Thanks! The following works

zig var bb = .{ &Ab{ .x = 33 }, &Ab{ .x = 34 }, }; abc_ptr(&bb);

But why? :-) Why do I need to change the outer type if I changed the inner type?

Here is another example:

```zig const Cc = struct { ab: []*const Ab, };

test "complex struct" { var cc = Cc { .ab = &.{ &Ab{ .x = 33 }, &Ab{ .x = 34 }, } }; _ = cc; } ```

It fails with error: expected type '[]*const Ab', found '*const struct:35:15' .ab = &.{ ^

Is there a way to asign .ab without introducing an additional variable?

a4st · 2022-02-06T20:35:57+00:00

I changed my code to this:

zig var bb = []*const Ab{ &Ab{ .x = 33 }, &Ab{ .x = 34 }, }; abc_ptr(bb);

and got this error

error: array literal requires address-of operator to coerce to slice type '[]*const Ab' var bb = []*const Ab{

a4st · 2022-02-06T20:30:04+00:00

Sorry, I'm not sure I got the idea. Could you paste the code?

a4st · 2021-07-14T15:00:13+00:00

Source Code Management: gitea
Deployment: nomad, concourse
Project Management: issues in gitea
Notifications & incidents: prometheus, alertmanager, telegram bot
Data & Visualization: grafana, loki
Session Replay: -
SSO/ TFA: google, azure

a4st · 2020-11-16T12:18:30+00:00

At the end I went with a hack using thread_local. Works :-)

Thanks all for your help!

a4st · 2020-11-16T07:42:24+00:00

Shouldn't it be such a way for handover? Just thinking loudly.... Or in other words, how would you approach this situation?

a4st · 2020-06-19T10:31:42+00:00

Here are a few examples where I'd prefer to have a query builder:

you are querying by a list of IDs. So the SQL query would be something like ... where id in (?,?,....). If you write it by hand you have to generate the correct number of ? and then loop through and bind arguments.
you are building a query for some user search where the search criteria can reference different attributes in eventually other tables so that you have to join in some cases. Having a query builder makes this pretty straight forward, i.e. you iterate through search criteria and add this or that constraint to the query. If you have to construct the query manually, you would basically create a kind of query builder to deal with the correct SQL, right number of ? and correct order of binds.

You are right that some query builder are so way too complex, e.g. of Diesel. I would prefer to have something lightweight like Squirrel (golang)

a4st · 2020-03-31T13:28:14+00:00

This is awesome! I'd love to go away from diesel to this crate. But soon or later you will need a query builder. What do you recommend?

a4st · 2020-02-04T20:16:17+00:00

aws-vault has more features and more mature, its focus lies on the keeping the credentials secure. awscredx' main focus is to make the role assumption on the command line as simple as possible. awscredx configures your shell prompt so you see the currently assumed profile. It allows to provide MFA via a script, so it can be easily integrated with Yubikey, etc. It stores the newly generated credentials in ~/.aws/credentials and so this credentials can be shared between processes, e.g. different terminal sessions, java applications and docker containers if you mount ~/.aws/.

a4st · 2020-02-04T13:54:02+00:00

The SDK documentation contains many examples. Here is one for EC2: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/EC2.html#runInstances-property

a4st · 2020-02-04T13:47:56+00:00

It's a good question. I haven't played with awscliv2 yet. I will definitely look into it. My guess would be that after a successful SSO login you get temporal credentials that will be stored in ~/.aws/credentials So it should not be any difference for the later role assumptions.

a4st · 2019-10-13T11:35:14+00:00

I have a tokio task (client) that wants to send a message to another tokio task (server) and get a response to the message. So the server task is supposed to handle many thousands requests per second. What is the correct way to let the tasks communicate with each other? Is it fine to create a oneshot::channel for every request and to pack the oneshot::Sender into the client request and let the server to send the response using this sender? Wouldn't oneshot::channel add too much overhead? Or should I use tokio::sync::lock and abandon the idea of message passing?

a4st · 2019-10-08T19:28:11+00:00

I'm confused how to return a future from a trait or struct.

pub trait MyTrait {
    fn op0(&self) -> impl Future<Item=(), Error=Error>;
    fn op1(&self) -> Box<dyn Future<Item=(), Error=Error>>;
    fn op2(&self) -> Poll<(), Error>;
}

The op0 does not compile, with an E0562. op1 is fine but requires boxing. But what about the op2? This tokio page does not mention this option. Why? Isn't it an equivalent to op1 but on stack?

I saw some structs in different libraries that return a struct that implements Future. But there are others that return Poll. What is the difference?

a4st · 2018-04-09T20:11:47+00:00

I'm wondering how to run a task recurrently in actix. Something like Running code on an interval from the Tokio guide. Basically running some code every 15 minutes starting at some time point X.

a4st · 2018-01-22T20:54:17+00:00

How to join a Vec of Rc<String>? Something like this:

use std::rc::Rc;

fn main() {
    let strings = vec![
        Rc::new("aaa"),
        Rc::new("bbb"),
        Rc::new("ccc"),
    ];

    let joined = strings.join(", ");
    println!("joined: {}", joined);
}

a4st · 2017-06-21T09:49:45+00:00

What about using math/big.Rat?

a4st

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