Dockerized - Search app using golang api server backed by Elasticsearch

This is a demo search appliction. The search entity is voucher aka coupons.

Run the search app locally - standalone

1. Install stable docker for mac from docker-for-mac

run elastic backed

1. run docker-compose build
2. run docker-compose up
3. Follow section - create voucher index
4. Visit voucher search http://localhost:8000/

run postgres backed

1. run docker-compose -f docker-compose-postgres.yaml build
2. run docker-compose -f docker-compose-postgres.yaml up
3. //TODO adding data
4. Visit voucher search http://localhost:8000/

Run docker cluster/swarm mode

Follow README-CLUSTER.md

---

Development mode

run elasticserach docker instance

docker run -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" docker.elastic.co/elasticsearch/elasticsearch:6.1.1

create voucher index

Create voucher index with mappings
curl -H "Content-Type: application/json" -XPUT 'localhost:9200/voucher/?pretty' --data-binary "@index_settings.json"

Add sample data voucher.json to Elasticsearch voucher index
curl -H "Content-Type: application/json" -XPOST 'localhost:9200/voucher/_bulk?pretty&refresh' --data-binary "@voucher.json"

Delete voucher index. Run this only to start fresh.
curl -H "Content-Type: application/json" -XDELETE 'localhost:9200/voucher/?pretty'

run search api locally

main.go, change to elasticUrl := "http://localhost:9200"
cd golang-api
glide install
go run *.go
visit http://localhost:8080/

run html voucher search page

open new terminal
cd html-web-ui
python -m SimpleHTTPServer 8000
visit http://localhost:8000/

Tools

Install chrome elasticsearch head to view the indexes
Cancel user/passord dialog if displayed while viewing index after next step

Pushing to docker hub

docker login

cd golang-api
docker build -t golang-api .
docker images
docker tag golang-api yogeshsr/get-started:golang-api-1.0
docker push yogeshsr/get-started:golang-api-1.0

cd html-web-ui
docker build -t html-web-ui .
docker images
docker tag html-web-ui yogeshsr/get-started:html-web-ui-1.0
docker push yogeshsr/get-started:html-web-ui-1.0

Note:
html-web-ui-2.0 is pushed with serviceUrl to localhost in currency-autocomplete.js
localhost is used in dev and by compose. Refer [README-CLUSTER.md](./README-CLUSTER.md)

For compose and swarm mode,
elasticUrl := "http://elasticsearch:9200"
since elastic will allow connection to this public_host address
https://github.com/olivere/elastic/wiki/Docker

Notes

'connection failed' logged during api startup since elactic don't have voucher index.
Create the index as described above curl commands

Stop, build & start. Needed when golang code is changed.
docker-compose down
docker-compose build
docker-compose up