Overview

TODO diagram

TODO Style notes

• NO package init() functions
• Dynamic behaviour must be explicit

Cross-compile server on host, run it in container

These are simple steps using a single container.

1. build server on host

   GOOS=linux GOARCH=arm64 go build
   

2. build docker image

   docker build -t server-image .
   

3. Start container with shared directory

   docker run -it \
          -v   /Users/hohn/work-gh/mrva/mrvacommander:/mrva/mrvacommander \
          server-image
   

4. Run server in container

   cd /mrva/mrvacommander/cmd/server/ && ./server
   

Using docker-compose

Steps to build and run the server in a multi-container environment set up by docker-compose.

1. Build server on host

   cd ~/work-gh/mrva/mrvacommander/cmd/server/
   GOOS=linux GOARCH=arm64 go build
   

2. Start the containers

   cd ~/work-gh/mrva/mrvacommander/
   docker-compose down
   docker-compose up -d
   

3. Run server in its container

   cd ~/work-gh/mrva/mrvacommander/
   docker exec -it server bash
   cd /mrva/mrvacommander/cmd/server/ 
   ./server -loglevel=debug -mode=container
   

4. Test server via remote client by following the steps in gh-mrva

Some general docker-compose commands

2. Get service status

   docker-compose ps
   

3. Stop services

   docker-compose down
   

4. View all logs

   docker-compose logs
   

5. check containers from server container

   docker exec -it server bash
   curl -I postgres:5432
   curl -I http://rabbitmq:15672
   

Some postgres specific commands

1. Access PostgreSQL

   psql -h localhost -p 5432 -U exampleuser -d exampledb
   

2. List all tables

   \dt
   

To run pgmin, the minimal go/postgres test part of this repository:

1. Run pgmin

   cd ~/work-gh/mrva/mrvacommander/cmd/postgres
   GOOS=linux GOARCH=arm64 go build
   docker exec -it server bash
   /mrva/mrvacommander/cmd/postgres/postgres
   

   Exit the container. Back on the host:

   psql -h localhost -p 5432 -U exampleuser -d exampledb
   \dt
   

   Should show

           List of relations
    Schema |    Name     | Type  |    Owner
   --------+-------------+-------+-------------
    public | owner_repos | table | exampleuser    
   

2. Check table contents

   exampledb=# select * from owner_repos;
    owner |  repo
   -------+---------
    foo   | foo/bar