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https://github.com/ndrean/docker-slim
Slim Rails images, Rails/Sidekiq/ActionCable-standalone/Nginx with Docker-Compose & Kubernetes (StatefulSet Postgres & Redis)
https://github.com/ndrean/docker-slim
actioncable docker kubernetes postgresql preact rails redis sidekiq websockets
Last synced: 22 days ago
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Slim Rails images, Rails/Sidekiq/ActionCable-standalone/Nginx with Docker-Compose & Kubernetes (StatefulSet Postgres & Redis)
- Host: GitHub
- URL: https://github.com/ndrean/docker-slim
- Owner: ndrean
- Created: 2021-06-27T11:25:44.000Z (over 3 years ago)
- Default Branch: master
- Last Pushed: 2021-09-05T05:30:46.000Z (over 3 years ago)
- Last Synced: 2024-10-25T13:41:24.894Z (2 months ago)
- Topics: actioncable, docker, kubernetes, postgresql, preact, rails, redis, sidekiq, websockets
- Language: Ruby
- Homepage:
- Size: 11.7 MB
- Stars: 0
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Explanations
## Branches
- Deployed on Heroku: , but without Sidekiq (2 free dynos only).
- master <=> run with `overmind start -f Procfile.overmind`
- dock-dev <=> run `docker-compose up --build`
- docker-prod <=> build images and run `docker-compose up --build`
- Kubernets/Minikube <=> start Minikube and run Tilt
## Initialize the PostgreSQL database
- modifiy **/config/database.yml** (or **.env**) to pass to the Postgres adapter the desired user/password: `POSTGRES_URL=postgresql://bob:bobpwd@localhost:5432/k8_development`
- run in a terminal:
```sh
RAILS_ENV=development rails rails db:drop rails:prepare
```
- connect to PostgreSQL to create ROLE 'bob' with password "bobpwd"
```sql
psql -U postgres
# get list of databases
\l
# connect to the desired database
\c k8_development
CREATE ROLE bob WITH SUPERUSER CREATEDB LOGIN PASSWORD 'bobpwd';
```
Same database name for `primary` and `replica`:
Initialize ElephantSQL database:
```sql
CREATE TABLE counters (
id bigserial PRIMARY KEY,
nb integer,
created_at timestamp,
updated_at timestamp
);
```
## Run `overmind`
The app is running locally with hot static assets replacement and Rails running in dev mode (page refresh will update the app). Run `overmind start` to start the four processes _rails_, _webpack-dev-server_, _redis_ and _sidekiq_:
The following runs on OSX (use "redis-server /usr/local/etc/redis.conf" on OSX, and "/usr/local/etc/redis/redis.conf" on Linux ):
```txt
assets: ./bin/webpack-dev-server
web: bundle exec rails server
redis-server: redis-server /usr/local/etc/redis.conf
worker: bundle exec sidekiq -C config/sidekiq.yml
cable: bundle exec puma -p 28080 cable/config.ru
```
## The Redis database
Modify **/usr/local/etc/redis/redis.conf** with `requirespass secretpwd`.
Once the app is running (ie **redis-server** is up), we can check that Redis is protected by the password by connecting to the redis-cli:
```sh
redis-cli
127.0.0.1:6379> GET counter
(error) NOAUTH Authentication required
127.0.0.1:6379> AUTH secretpwd
OK
127.0.0.1:6379> GET counter
23
```
We can setup Redis with AOF and RDB.
## Gem **sidekiq_alive**
## Example Rackup
Declared a controller "Example_Controller" inheriting from ApplicationController::Base
Then "config.ex.ru" and launched with:
"bundle exec puma -b tcp://0.0.0.0:3001 config.ex.ru"
=> this is used for cable with `/cable/config.ru` to run a standalone Cable.
## Nginx
```sh
cp nginx/k8nginx.conf /usr/local/etc/nginx/servers/
nginx -s stop && nginx
```
The config will pass the web sockets.