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Go RAG Server with Ollama and Weviate
Raw
.AAAA-Golang-RAG-Example.md

Golang RAG Example

Recently, the golang team posted an article on how to construct a RAG service in golang. While this is a great article, it uses primarily cloud-hosted AI providers. This would be the reasonable choice for a production system, but for a small project or a learning experience, it would be nice to have a local option. This project aims to provide an example of how to construct a RAG service in golang using locally hosted models.

Technology

  • Vector Store: Weviate
  • AI Model API: Ollama

By using Ollama, this setup is able to run off of CPU (available for pretty much everyone) but does so SLOWLY, or off of GPU (available for fewer people) but does so quickly.

The Weaviate vector store is used to store the embeddings of the documents and the queries.

Usage

./run.sh
./add-documents.sh
./query.sh "tell me something about fuel"
docker compose down

Notes

Inspired by https://go.dev/blog/llmpowered

Original code: https://github.com/golang/example/tree/master/ragserver/ragserver

TODO: contribute this back as an ollama sample

Test Data / scripts pulled from: https://github.com/golang/example/tree/master/ragserver/tests

Raw
.air.toml
root = "."
testdata_dir = "testdata"
tmp_dir = ".tmp"
[build]
args_bin = []
bin = "./.tmp/main"
cmd = "go build -o ./.tmp/main ."
delay = 1000
exclude_dir = ["assets", "tmp", "vendor", "testdata"]
exclude_file = []
exclude_regex = ["_test.go"]
exclude_unchanged = false
follow_symlink = false
full_bin = ""
include_dir = []
include_ext = ["go", "tpl", "tmpl", "html"]
include_file = []
kill_delay = "0s"
log = "build-errors.log"
poll = false
poll_interval = 0
post_cmd = []
pre_cmd = []
rerun = false
rerun_delay = 500
send_interrupt = false
stop_on_error = false
[color]
app = ""
build = "yellow"
main = "magenta"
runner = "green"
watcher = "cyan"
[log]
main_only = false
silent = false
time = false
[misc]
clean_on_exit = false
[proxy]
app_port = 0
enabled = false
proxy_port = 0
[screen]
clear_on_rebuild = false
keep_scroll = true
Raw
add-documents.sh
#!/bin/bash
# This script interacts with a running ragserver to add some example documents.
set -eux
echo '{
"documents": [
{"text": "TDXIRV is an environment variable for controlling throttle speed"},
{"text": "some flags for setting acceleration are --accelxyzp and --acceljjrv"},
{"text": "acceleration is also affected by the ACCUVI5 env var"},
{"text": "/usr/local/fuel555 contains information about fuel capacity"},
{"text": "we can control fuel savings with the --savemyfuelplease flag"},
{"text": "fuel savings can be observed on local port 48332"}
]}' | tr -d "\n" | curl \
-X POST \
-H 'Content-Type: application/json' \
-d @- \
http://localhost:9020/add/
Raw
docker-compose.yml
services:
setup:
image: alpine
command: |
sh -c "
if [[ -z "${DOCKER_USER}" ]]; then
echo 'DOCKER_USER is not set (use run.sh)'
exit 1
fi
mkdir -p /mnt/ollama /mnt/weaviate /mnt/rag
"
volumes:
- ./.tmp:/mnt
user: ${DOCKER_USER}
weaviate:
image: cr.weaviate.io/semitechnologies/weaviate:1.28.11
depends_on:
setup:
condition: service_completed_successfully
ports:
- 9035:8080
- 50051:50051
environment:
QUERY_DEFAULTS_LIMIT: 25
AUTHENTICATION_ANONYMOUS_ACCESS_ENABLED: 'true'
PERSISTENCE_DATA_PATH: '/var/lib/weaviate'
DEFAULT_VECTORIZER_MODULE: 'none'
CLUSTER_HOSTNAME: 'node1'
volumes:
- ./.tmp/weaviate:/var/lib/weaviate
user: ${DOCKER_USER}
ollama:
image: ollama/ollama:latest
depends_on:
setup:
condition: service_completed_successfully
ports:
- 11434:11434
volumes:
- ./.tmp/ollama:/mnt
user: ${DOCKER_USER}
environment:
OLLAMA_KEEP_ALIVE: 24h
OLLAMA_HOST: 0.0.0.0
OLLAMA_MODELS: /mnt/models
HOME: /mnt/
app:
build: .
depends_on:
setup:
condition: service_completed_successfully
ports:
- 9020:9020
volumes:
- .:/mnt
- ./.tmp/rag:/tmp
user: ${DOCKER_USER}
environment:
OLLAMA_HOST: http://ollama:11434
WEAVIATE_HOST: weaviate:8080
Raw
Dockerfile
FROM golang:1.24.1-alpine
WORKDIR /mnt
RUN go install -v github.com/air-verse/air@latest
ENV GOCACHE=/tmp/go-build
ENV GOMODCACHE=/tmp/go-pkg
USER guest
CMD ["air", "-d", "-c", ".air.toml"]
Raw
go.mod
module gist.github.com/bign8/59d5d6c7841baccf9fb84f326dfaeca8
go 1.24.0
toolchain go1.24.1
require (
github.com/weaviate/weaviate v1.29.1
github.com/weaviate/weaviate-go-client/v5 v5.0.2
github.com/xyproto/ollamaclient/v2 v2.7.1
)
require (
github.com/allegro/bigcache/v3 v3.1.1-0.20240222131551-901589e4644b // indirect
github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
github.com/dustin/go-humanize v1.0.1 // indirect
github.com/go-openapi/analysis v0.23.0 // indirect
github.com/go-openapi/errors v0.22.0 // indirect
github.com/go-openapi/jsonpointer v0.21.0 // indirect
github.com/go-openapi/jsonreference v0.21.0 // indirect
github.com/go-openapi/loads v0.22.0 // indirect
github.com/go-openapi/runtime v0.24.2 // indirect
github.com/go-openapi/spec v0.21.0 // indirect
github.com/go-openapi/strfmt v0.23.0 // indirect
github.com/go-openapi/swag v0.23.0 // indirect
github.com/go-openapi/validate v0.24.0 // indirect
github.com/google/uuid v1.6.0 // indirect
github.com/josharian/intern v1.0.0 // indirect
github.com/mailru/easyjson v0.7.7 // indirect
github.com/mitchellh/mapstructure v1.5.0 // indirect
github.com/oklog/ulid v1.3.1 // indirect
github.com/opentracing/opentracing-go v1.2.0 // indirect
github.com/pkg/errors v0.9.1 // indirect
github.com/xyproto/env/v2 v2.5.3 // indirect
go.mongodb.org/mongo-driver v1.14.0 // indirect
golang.org/x/net v0.35.0 // indirect
golang.org/x/oauth2 v0.25.0 // indirect
golang.org/x/sys v0.30.0 // indirect
golang.org/x/text v0.22.0 // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20250102185135-69823020774d // indirect
google.golang.org/grpc v1.69.4 // indirect
google.golang.org/protobuf v1.36.3 // indirect
gopkg.in/yaml.v2 v2.4.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)
Raw
go.sum
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
github.com/allegro/bigcache/v3 v3.1.1-0.20240222131551-901589e4644b h1:1+WfnfjMtmNFvZohd6NvMP8QB5q4KjGw4kNtLt9yXVM=
github.com/allegro/bigcache/v3 v3.1.1-0.20240222131551-901589e4644b/go.mod h1:aPyh7jEvrog9zAwx5N7+JUQX5dZTSGpxF1LAR4dr35I=
github.com/asaskevich/govalidator v0.0.0-20200907205600-7a23bdc65eef/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
github.com/asaskevich/govalidator v0.0.0-20210307081110-f21760c49a8d/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3dyBCFEj5IhUbnKptjxatkF07cF2ak3yi77so=
github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
github.com/go-openapi/analysis v0.21.2/go.mod h1:HZwRk4RRisyG8vx2Oe6aqeSQcoxRp47Xkp3+K6q+LdY=
github.com/go-openapi/analysis v0.23.0 h1:aGday7OWupfMs+LbmLZG4k0MYXIANxcuBTYUC03zFCU=
github.com/go-openapi/analysis v0.23.0/go.mod h1:9mz9ZWaSlV8TvjQHLl2mUW2PbZtemkE8yA5v22ohupo=
github.com/go-openapi/errors v0.19.8/go.mod h1:cM//ZKUKyO06HSwqAelJ5NsEMMcpa6VpXe8DOa1Mi1M=
github.com/go-openapi/errors v0.19.9/go.mod h1:cM//ZKUKyO06HSwqAelJ5NsEMMcpa6VpXe8DOa1Mi1M=
github.com/go-openapi/errors v0.20.2/go.mod h1:cM//ZKUKyO06HSwqAelJ5NsEMMcpa6VpXe8DOa1Mi1M=
github.com/go-openapi/errors v0.22.0 h1:c4xY/OLxUBSTiepAg3j/MHuAv5mJhnf53LLMWFB+u/w=
github.com/go-openapi/errors v0.22.0/go.mod h1:J3DmZScxCDufmIMsdOuDHxJbdOGC0xtUynjIx092vXE=
github.com/go-openapi/jsonpointer v0.19.3/go.mod h1:Pl9vOtqEWErmShwVjC8pYs9cog34VGT37dQOVbmoatg=
github.com/go-openapi/jsonpointer v0.19.5/go.mod h1:Pl9vOtqEWErmShwVjC8pYs9cog34VGT37dQOVbmoatg=
github.com/go-openapi/jsonpointer v0.21.0 h1:YgdVicSA9vH5RiHs9TZW5oyafXZFc6+2Vc1rr/O9oNQ=
github.com/go-openapi/jsonpointer v0.21.0/go.mod h1:IUyH9l/+uyhIYQ/PXVA41Rexl+kOkAPDdXEYns6fzUY=
github.com/go-openapi/jsonreference v0.19.6/go.mod h1:diGHMEHg2IqXZGKxqyvWdfWU/aim5Dprw5bqpKkTvns=
github.com/go-openapi/jsonreference v0.21.0 h1:Rs+Y7hSXT83Jacb7kFyjn4ijOuVGSvOdF2+tg1TRrwQ=
github.com/go-openapi/jsonreference v0.21.0/go.mod h1:LmZmgsrTkVg9LG4EaHeY8cBDslNPMo06cago5JNLkm4=
github.com/go-openapi/loads v0.21.1/go.mod h1:/DtAMXXneXFjbQMGEtbamCZb+4x7eGwkvZCvBmwUG+g=
github.com/go-openapi/loads v0.22.0 h1:ECPGd4jX1U6NApCGG1We+uEozOAvXvJSF4nnwHZ8Aco=
github.com/go-openapi/loads v0.22.0/go.mod h1:yLsaTCS92mnSAZX5WWoxszLj0u+Ojl+Zs5Stn1oF+rs=
github.com/go-openapi/runtime v0.24.2 h1:yX9HMGQbz32M87ECaAhGpJjBmErO3QLcgdZj9BzGx7c=
github.com/go-openapi/runtime v0.24.2/go.mod h1:AKurw9fNre+h3ELZfk6ILsfvPN+bvvlaU/M9q/r9hpk=
github.com/go-openapi/spec v0.20.4/go.mod h1:faYFR1CvsJZ0mNsmsphTMSoRrNV3TEDoAM7FOEWeq8I=
github.com/go-openapi/spec v0.21.0 h1:LTVzPc3p/RzRnkQqLRndbAzjY0d0BCL72A6j3CdL9ZY=
github.com/go-openapi/spec v0.21.0/go.mod h1:78u6VdPw81XU44qEWGhtr982gJ5BWg2c0I5XwVMotYk=
github.com/go-openapi/strfmt v0.21.0/go.mod h1:ZRQ409bWMj+SOgXofQAGTIo2Ebu72Gs+WaRADcS5iNg=
github.com/go-openapi/strfmt v0.21.1/go.mod h1:I/XVKeLc5+MM5oPNN7P6urMOpuLXEcNrCX/rPGuWb0k=
github.com/go-openapi/strfmt v0.21.2/go.mod h1:I/XVKeLc5+MM5oPNN7P6urMOpuLXEcNrCX/rPGuWb0k=
github.com/go-openapi/strfmt v0.23.0 h1:nlUS6BCqcnAk0pyhi9Y+kdDVZdZMHfEKQiS4HaMgO/c=
github.com/go-openapi/strfmt v0.23.0/go.mod h1:NrtIpfKtWIygRkKVsxh7XQMDQW5HKQl6S5ik2elW+K4=
github.com/go-openapi/swag v0.19.5/go.mod h1:POnQmlKehdgb5mhVOsnJFsivZCEZ/vjK9gh66Z9tfKk=
github.com/go-openapi/swag v0.19.15/go.mod h1:QYRuS/SOXUCsnplDa677K7+DxSOj6IPNl/eQntq43wQ=
github.com/go-openapi/swag v0.21.1/go.mod h1:QYRuS/SOXUCsnplDa677K7+DxSOj6IPNl/eQntq43wQ=
github.com/go-openapi/swag v0.23.0 h1:vsEVJDUo2hPJ2tu0/Xc+4noaxyEffXNIs3cOULZ+GrE=
github.com/go-openapi/swag v0.23.0/go.mod h1:esZ8ITTYEsH1V2trKHjAN8Ai7xHb8RV+YSZ577vPjgQ=
github.com/go-openapi/validate v0.21.0/go.mod h1:rjnrwK57VJ7A8xqfpAOEKRH8yQSGUriMu5/zuPSQ1hg=
github.com/go-openapi/validate v0.24.0 h1:LdfDKwNbpB6Vn40xhTdNZAnfLECL81w+VX3BumrGD58=
github.com/go-openapi/validate v0.24.0/go.mod h1:iyeX1sEufmv3nPbBdX3ieNviWnOZaJ1+zquzJEf2BAQ=
github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
github.com/go-stack/stack v1.8.1/go.mod h1:dcoOX6HbPZSZptuspn9bctJ+N/CnF5gGygcUP3XYfe4=
github.com/gobuffalo/attrs v0.0.0-20190224210810-a9411de4debd/go.mod h1:4duuawTqi2wkkpB4ePgWMaai6/Kc6WEz83bhFwpHzj0=
github.com/gobuffalo/depgen v0.0.0-20190329151759-d478694a28d3/go.mod h1:3STtPUQYuzV0gBVOY3vy6CfMm/ljR4pABfrTeHNLHUY=
github.com/gobuffalo/depgen v0.1.0/go.mod h1:+ifsuy7fhi15RWncXQQKjWS9JPkdah5sZvtHc2RXGlg=
github.com/gobuffalo/envy v1.6.15/go.mod h1:n7DRkBerg/aorDM8kbduw5dN3oXGswK5liaSCx4T5NI=
github.com/gobuffalo/envy v1.7.0/go.mod h1:n7DRkBerg/aorDM8kbduw5dN3oXGswK5liaSCx4T5NI=
github.com/gobuffalo/flect v0.1.0/go.mod h1:d2ehjJqGOH/Kjqcoz+F7jHTBbmDb38yXA598Hb50EGs=
github.com/gobuffalo/flect v0.1.1/go.mod h1:8JCgGVbRjJhVgD6399mQr4fx5rRfGKVzFjbj6RE/9UI=
github.com/gobuffalo/flect v0.1.3/go.mod h1:8JCgGVbRjJhVgD6399mQr4fx5rRfGKVzFjbj6RE/9UI=
github.com/gobuffalo/genny v0.0.0-20190329151137-27723ad26ef9/go.mod h1:rWs4Z12d1Zbf19rlsn0nurr75KqhYp52EAGGxTbBhNk=
github.com/gobuffalo/genny v0.0.0-20190403191548-3ca520ef0d9e/go.mod h1:80lIj3kVJWwOrXWWMRzzdhW3DsrdjILVil/SFKBzF28=
github.com/gobuffalo/genny v0.1.0/go.mod h1:XidbUqzak3lHdS//TPu2OgiFB+51Ur5f7CSnXZ/JDvo=
github.com/gobuffalo/genny v0.1.1/go.mod h1:5TExbEyY48pfunL4QSXxlDOmdsD44RRq4mVZ0Ex28Xk=
github.com/gobuffalo/gitgen v0.0.0-20190315122116-cc086187d211/go.mod h1:vEHJk/E9DmhejeLeNt7UVvlSGv3ziL+djtTr3yyzcOw=
github.com/gobuffalo/gogen v0.0.0-20190315121717-8f38393713f5/go.mod h1:V9QVDIxsgKNZs6L2IYiGR8datgMhB577vzTDqypH360=
github.com/gobuffalo/gogen v0.1.0/go.mod h1:8NTelM5qd8RZ15VjQTFkAW6qOMx5wBbW4dSCS3BY8gg=
github.com/gobuffalo/gogen v0.1.1/go.mod h1:y8iBtmHmGc4qa3urIyo1shvOD8JftTtfcKi+71xfDNE=
github.com/gobuffalo/logger v0.0.0-20190315122211-86e12af44bc2/go.mod h1:QdxcLw541hSGtBnhUc4gaNIXRjiDppFGaDqzbrBd3v8=
github.com/gobuffalo/mapi v1.0.1/go.mod h1:4VAGh89y6rVOvm5A8fKFxYG+wIW6LO1FMTG9hnKStFc=
github.com/gobuffalo/mapi v1.0.2/go.mod h1:4VAGh89y6rVOvm5A8fKFxYG+wIW6LO1FMTG9hnKStFc=
github.com/gobuffalo/packd v0.0.0-20190315124812-a385830c7fc0/go.mod h1:M2Juc+hhDXf/PnmBANFCqx4DM3wRbgDvnVWeG2RIxq4=
github.com/gobuffalo/packd v0.1.0/go.mod h1:M2Juc+hhDXf/PnmBANFCqx4DM3wRbgDvnVWeG2RIxq4=
github.com/gobuffalo/packr/v2 v2.0.9/go.mod h1:emmyGweYTm6Kdper+iywB6YK5YzuKchGtJQZ0Odn4pQ=
github.com/gobuffalo/packr/v2 v2.2.0/go.mod h1:CaAwI0GPIAv+5wKLtv8Afwl+Cm78K/I/VCm/3ptBN+0=
github.com/gobuffalo/syncx v0.0.0-20190224160051-33c29581e754/go.mod h1:HhnNqWY95UYwwW3uSASeV7vtgYkT2t16hJgV3AEPUpw=
github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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go.opentelemetry.io/otel/metric v1.33.0/go.mod h1:L9+Fyctbp6HFTddIxClbQkjtubW6O9QS3Ann/M82u6M=
go.opentelemetry.io/otel/sdk v1.33.0 h1:iax7M131HuAm9QkZotNHEfstof92xM+N8sr3uHXc2IM=
go.opentelemetry.io/otel/sdk v1.33.0/go.mod h1:A1Q5oi7/9XaMlIWzPSxLRWOI8nG3FnzHJNbiENQuihM=
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go.opentelemetry.io/otel/sdk/metric v1.31.0/go.mod h1:CRInTMVvNhUKgSAMbKyTMxqOBC0zgyxzW55lZzX43Y8=
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golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190422162423-af44ce270edf/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20201216223049-8b5274cf687f/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20210421230115-4e50805a0758/go.mod h1:72T/g9IO56b78aLF+1Kcs5dz7/ng1VjMUvfKvpfy+jM=
golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
golang.org/x/net v0.35.0 h1:T5GQRQb2y08kTAByq9L4/bz8cipCdA8FbRTXewonqY8=
golang.org/x/net v0.35.0/go.mod h1:EglIi67kWsHKlRzzVMUD93VMSWGFOMSZgxFjparz1Qk=
golang.org/x/oauth2 v0.25.0 h1:CY4y7XT9v0cRI9oupztF8AgiIu99L/ksR/Xp/6jrZ70=
golang.org/x/oauth2 v0.25.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190412183630-56d357773e84/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190419153524-e8e3143a4f4a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190531175056-4c3a928424d2/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210420072515-93ed5bcd2bfe/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190329151228-23e29df326fe/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190416151739-9c9e1878f421/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190420181800-aa740d480789/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190531172133-b3315ee88b7d/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/genproto/googleapis/rpc v0.0.0-20250102185135-69823020774d h1:xJJRGY7TJcvIlpSrN3K6LAWgNFUILlO+OMAqtg9aqnw=
google.golang.org/genproto/googleapis/rpc v0.0.0-20250102185135-69823020774d/go.mod h1:3ENsm/5D1mzDyhpzeRi1NR784I0BcofWBoSc5QqqMK4=
google.golang.org/grpc v1.69.4 h1:MF5TftSMkd8GLw/m0KM6V8CMOCY6NZ1NQDPGFgbTt4A=
google.golang.org/grpc v1.69.4/go.mod h1:vyjdE6jLBI76dgpDojsFGNaHlxdjXN9ghpnd2o7JGZ4=
google.golang.org/protobuf v1.36.3 h1:82DV7MYdb8anAVi3qge1wSnMDrnKK7ebr+I0hHRN1BU=
google.golang.org/protobuf v1.36.3/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
Raw
json.go
// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"encoding/json"
"fmt"
"mime"
"net/http"
)
// readRequestJSON expects req to have a JSON content type with a body that
// contains a JSON-encoded value complying with the underlying type of target.
// It populates target, or returns an error.
func readRequestJSON(req *http.Request, target any) error {
contentType := req.Header.Get("Content-Type")
mediaType, _, err := mime.ParseMediaType(contentType)
if err != nil {
return err
}
if mediaType != "application/json" {
return fmt.Errorf("expect application/json Content-Type, got %s", mediaType)
}
dec := json.NewDecoder(req.Body)
dec.DisallowUnknownFields()
return dec.Decode(target)
}
// renderJSON renders 'v' as JSON and writes it as a response into w.
func renderJSON(w http.ResponseWriter, v any) {
js, err := json.Marshal(v)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.Write(js)
w.Write([]byte("\n"))
}
Raw
main.go
// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Command ragserver is an HTTP server that implements RAG (Retrieval
// Augmented Generation) using the Gemini model and Weaviate. See the
// accompanying README file for additional details.
package main
import (
"cmp"
"context"
"fmt"
"log"
"net/http"
"os"
"strings"
"github.com/xyproto/ollamaclient/v2"
)
// This is a standard Go HTTP server. Server state is in the ragServer struct.
// The `main` function connects to the required services (Weaviate and Google
// AI), initializes the server state and registers HTTP handlers.
func main() {
oc := ollamaclient.New(`gemma2:2b`) // usermodel.GetTextGernerationModel()
oc.Verbose = true
if err := oc.PullIfNeeded(); err != nil {
fmt.Println("Error:", err)
return
}
weaviate, err := initWeaviate(context.Background())
if err != nil {
log.Fatal(err)
}
server := &ragServer{
weaviate: weaviate,
ollama: oc,
}
mux := http.NewServeMux()
mux.HandleFunc("POST /add/", server.addDocumentsHandler)
mux.HandleFunc("POST /query/", server.queryHandler)
port := cmp.Or(os.Getenv("SERVERPORT"), "9020")
address := "0.0.0.0:" + port
log.Println("listening on", address)
log.Fatal(http.ListenAndServe(address, mux))
}
type ragServer struct {
weaviate *weaviateClient
ollama *ollamaclient.Config
}
func (rs *ragServer) getEmbeddings(prompt string) ([]float32, error) {
res, err := rs.ollama.Embeddings(prompt)
if err != nil {
return nil, err
}
out := make([]float32, len(res))
for i, v := range res {
out[i] = float32(v)
}
return out, nil
}
func (rs *ragServer) addDocumentsHandler(w http.ResponseWriter, req *http.Request) {
// Parse HTTP request from JSON.
var addRequest struct {
Documents []Document
}
if err := readRequestJSON(req, &addRequest); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
// ollama doesn't have a batch API, so we have to embed each document individually.
log.Printf("invoking embedding model with %v documents", len(addRequest.Documents))
for i, doc := range addRequest.Documents {
embeddings, err := rs.getEmbeddings(doc.Text)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
addRequest.Documents[i].Embeddings = embeddings
}
// Store documents with embeddings in the Weaviate DB.
log.Printf("storing %v objects in weaviate", len(addRequest.Documents))
err := rs.weaviate.addDocuments(req.Context(), addRequest.Documents)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
func (rs *ragServer) queryHandler(w http.ResponseWriter, req *http.Request) {
// Parse HTTP request from JSON.
var qr struct {
Content string
}
err := readRequestJSON(req, &qr)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
// Embed the query contents.
values, err := rs.getEmbeddings(qr.Content)
if err != nil {
log.Printf("embedding query: %v", err.Error())
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// Search weaviate to find the most relevant (closest in vector space) documents to the query.
docs, err := rs.weaviate.query(req.Context(), values)
if err != nil {
http.Error(w, fmt.Errorf("reading weaviate response: %w", err).Error(), http.StatusInternalServerError)
return
}
contents := make([]string, len(docs))
for i, doc := range docs {
contents[i] = doc.Text
}
// Create a RAG query for the LLM with the most relevant documents as context.
ragQuery := fmt.Sprintf(ragTemplateStr, qr.Content, strings.Join(contents, "\n"))
log.Printf(`found %d documents`, len(contents))
out, err := rs.ollama.GetOutput(ragQuery)
if err != nil {
log.Printf(`calling generative model: %v`, err.Error())
http.Error(w, `generative model error`, http.StatusInternalServerError)
return
}
renderJSON(w, out)
}
const ragTemplateStr = `
I will ask you a question and will provide some additional context information.
Assume this context information is factual and correct, as part of internal documentation.
If the question relates to the context, answer it using the context.
If the question does not relate to the context, answer it as normal.
For example, let's say the context has nothing in it about tropical flowers;
then if I ask you about tropical flowers, just answer what you know about them without referring to the context.
For example, if the context does mention minerology and I ask you about that,
provide information from the context along with general knowledge.
Question:
%s
Context:
%s
`
Raw
query.sh
#!/bin/bash
set -eu
# Check if an argument is provided
if [ $# -eq 0 ]; then
echo "Usage: $0 '<your query>'"
exit 1
fi
set -x
# Capture the query from the command-line argument
QUERY_CONTENT=$1
# Build the JSON payload
PAYLOAD=$(echo "{\"content\": \"$QUERY_CONTENT\"}")
# Send the request
echo "$PAYLOAD" | tr -d "\n" | curl \
-X POST \
-H 'Content-Type: application/json' \
-d @- \
http://localhost:9020/query/ | sed 's/\\n/\n/g'
Raw
run.sh
#! /bin/sh
export DOCKER_USER="$(id -u):$(id -g)"
echo "Running as ${DOCKER_USER}"
docker compose up --build --detach
Raw
weaviate-delete-objects.sh
#!/bin/bash
set -eux
curl \
-X DELETE \
http://localhost:9035/v1/schema/Document
Raw
weaviate-show-all.sh
#!/bin/bash
set -eux
echo '{
"query": "{
Get {
Document {
text
}
}
}"
}' | tr -d "\n" | curl \
-X POST \
-H 'Content-Type: application/json' \
-d @- \
http://localhost:9035/v1/graphql | jq .
Raw
weviate.go
// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
// Utilities for working with Weaviate.
import (
"cmp"
"context"
"fmt"
"os"
"time"
"github.com/weaviate/weaviate-go-client/v5/weaviate"
"github.com/weaviate/weaviate-go-client/v5/weaviate/graphql"
"github.com/weaviate/weaviate/entities/models"
)
// initWeaviate initializes a weaviate client for our application.
func initWeaviate(ctx context.Context) (*weaviateClient, error) {
client, err := weaviate.NewClient(weaviate.Config{
Host: cmp.Or(os.Getenv("WEAVIATE_HOST"), "localhost:9035"),
Scheme: "http",
})
if err != nil {
return nil, fmt.Errorf("initializing weaviate: %w", err)
}
if err := client.WaitForWeavaite(time.Minute); err != nil {
return nil, fmt.Errorf("waiting for weaviate: %w", err)
}
// Create a new class (collection) in weaviate if it doesn't exist yet.
cls := &models.Class{
Class: "Document",
Vectorizer: "none",
}
exists, err := client.Schema().ClassExistenceChecker().WithClassName(cls.Class).Do(ctx)
if err != nil {
return nil, fmt.Errorf("weaviate error: %w", err)
}
if !exists {
err = client.Schema().ClassCreator().WithClass(cls).Do(ctx)
if err != nil {
return nil, fmt.Errorf("weaviate error: %w", err)
}
}
return &weaviateClient{
client: client,
}, nil
}
type weaviateClient struct {
client *weaviate.Client
}
// combinedWeaviateError generates an error if err is non-nil or result has
// errors, and returns an error (or nil if there's no error). It's useful for
// the results of the Weaviate GraphQL API's "Do" calls.
func combinedWeaviateError(result *models.GraphQLResponse, err error) error {
if err != nil {
return err
}
if len(result.Errors) != 0 {
var ss []string
for _, e := range result.Errors {
ss = append(ss, e.Message)
}
return fmt.Errorf("weaviate error: %v", ss)
}
return nil
}
type Document struct {
Title string `json:"title,omitempty"` // new feature
Text string `json:"text"`
// Embeddings are the vector representation of the document.
// Only needed/specified when adding documents.
Embeddings []float32 `json:"-"`
}
func (w *weaviateClient) addDocuments(ctx context.Context, docs []Document) error {
// Convert our documents - along with their embedding vectors - into types used by the Weaviate client.
objects := make([]*models.Object, len(docs))
for i, doc := range docs {
if doc.Embeddings == nil || len(doc.Embeddings) == 0 {
return fmt.Errorf("document %d has no embeddings", i)
}
objects[i] = &models.Object{
Class: "Document",
Properties: map[string]interface{}{
"title": doc.Title,
"text": doc.Text,
},
Vector: doc.Embeddings,
}
}
_, err := w.client.Batch().ObjectsBatcher().WithObjects(objects...).Do(ctx)
return err
}
func (w *weaviateClient) query(ctx context.Context, values []float32) ([]Document, error) {
gql := w.client.GraphQL()
result, err := gql.Get().
WithNearVector(gql.NearVectorArgBuilder().WithVector(values)).
WithClassName("Document").
WithFields(graphql.Field{Name: "text"}, graphql.Field{Name: "title"}).
WithLimit(3).
Do(ctx)
if werr := combinedWeaviateError(result, err); werr != nil {
return nil, werr
}
return decodeGetResults(result)
}
// decodeGetResults decodes the result returned by Weaviate's GraphQL Get
// query; these are returned as a nested map[string]any (just like JSON
// unmarshaled into a map[string]any). We have to extract all document contents
// as a list of strings.
func decodeGetResults(result *models.GraphQLResponse) ([]Document, error) {
data, ok := result.Data["Get"]
if !ok {
return nil, fmt.Errorf("Get key not found in result")
}
doc, ok := data.(map[string]any)
if !ok {
return nil, fmt.Errorf("Get key unexpected type")
}
slc, ok := doc["Document"].([]any)
if !ok {
return nil, fmt.Errorf("Document is not a list of results")
}
var out []Document
for _, s := range slc {
smap, ok := s.(map[string]any)
if !ok {
return nil, fmt.Errorf("invalid element in list of documents")
}
s, ok := smap["text"].(string)
if !ok {
return nil, fmt.Errorf("expected string in list of documents")
}
out = append(out, Document{Text: s})
}
return out, nil
}
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