willdot.net
My implementation of gossip-gloomers - the fly.io distributed systems challenge (https://fly.io/dist-sys/)
setup of maelstrom inside docker container and first challenge complete
Signed-off-by: Will Andrews <will7989@hotmail.com>
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Dockerfile
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Dockerfile
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docker-compose.yaml
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docker-compose.yaml
···
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services:
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gossip-gloomers:
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container_name: gossip-gloomers
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build: .
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environment:
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- TEST_TO_RUN=placeholder_value
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volumes:
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# Mount the code in this repo so that the run script can build the app inside the container
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# on the fly inside of needing to build the app before hand
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- .:/home/linuxbrew/app
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command: ./run.sh
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go.mod
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go.mod
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go.sum
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go.sum
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main.go
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main.go
···
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package main
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import (
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"encoding/json"
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"log"
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maelstrom "github.com/jepsen-io/maelstrom/demo/go"
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)
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func main() {
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n := maelstrom.NewNode()
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n.Handle("echo", func(msg maelstrom.Message) error {
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// Unmarshal the message body as an loosely-typed map.
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var body map[string]any
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if err := json.Unmarshal(msg.Body, &body); err != nil {
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return err
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}
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// Update the message type to return back.
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body["type"] = "echo_ok"
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// Echo the original message back with the updated message type.
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return n.Reply(msg, body)
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})
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if err := n.Run(); err != nil {
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log.Fatal(err)
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}
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}
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readme.md
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readme.md
···
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## Gossip Gloomers
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This is my solutions to the [Gossip Gloomers](https://fly.io/dist-sys/) distributed systems problem by fly.io
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I have created a docker image for running the tests inside which can be run using `docker-compose run --rm -e TEST_TO_RUN=echo gossip-gloomers` (replacing the TEST_TO_RUN env to be the test to run).
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Note: The docker image is based off of the `homebrew/brew` image which is quite a whopper of an image so be prepaerd for a longish build time. Need to optimise that to be honest.
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run.sh
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run.sh
···
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#!/usr/bin/env bash
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go install .
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# Go back to where maelstrom is so that the additional files that are created when running it
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# don't end up in the mounted volume and on our local machines
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cd /home/linuxbrew/maelstrom/
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if [ "$TEST_TO_RUN" = 'echo' ]; then
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./maelstrom test -w $TEST_TO_RUN --bin /home/linuxbrew/go/bin/gossip-gloomers --node-count 1 --time-limit 10
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else
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echo "invalid input"
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fi