fix: slim container image... (#6)

* fix: slim container image...

- Add ignore all exept go files in .dockerignore
- Remove unnecessary spaces
* fix: alpine based image, install g++ in build ...
* For trimpath and ldflags s w

* fix: scratch base, static bin, utilize buildkit...

- Use scratch base image
- Use golang buster as build image
- Static bunary
- Utilize buildkit with gomod and build caching

Authored-by: pratikbin <pratikbin+010101@no-reply-github.com>

.dockerignore

@@ -0,0 +1,6 @@
+# Ignore everything
+*
+
+# But these files...
+!**/go.**
+!**.go

Dockerfile

@@ -1,13 +1,12 @@
-FROM golang:alpine3.15
+# syntax = docker/dockerfile:latest
+FROM golang as build
+WORKDIR /app
+COPY . .
+RUN --mount=type=cache,target=/go/pkg/mod \
+  --mount=type=cache,target=/root/.cache/go-build \
+  go mod tidy; \
+  CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o lazytainer ./...
 
-WORKDIR /root/
-COPY ./go.mod ./go.sum ./
-RUN go mod download
-COPY ./lazytainer.go .
-RUN go build lazytainer.go
-
-FROM alpine:latest
-WORKDIR /root/
-COPY --from=0 /root/lazytainer ./
-
-CMD ["./lazytainer"]
+FROM scratch
+COPY --from=build /app/lazytainer /usr/local/bin/lazytainer
+ENTRYPOINT ["/usr/local/bin/lazytainer"]

README.md

@@ -1,18 +1,18 @@
 # Lazytainer - Lazy Load Containers
-Putting your containers to sleep  
+Putting your containers to sleep
 [![Docker](https://github.com/vmorganp/Lazytainer/actions/workflows/docker-publish.yml/badge.svg)](https://github.com/vmorganp/Lazytainer/actions/workflows/docker-publish.yml)
 ---
 
 ## How it works
-Monitors network traffic for active connections and recieved packets  
-If traffic looks to be idle, container stops  
+Monitors network traffic for active connections and recieved packets
+If traffic looks to be idle, container stops
 If traffic is incoming to stopped container, container starts
 
 ## Want to test it?
 ```
 $ git clone https://github.com/vmorganp/Lazytainer
 $ cd Lazytainer
-$ docker-compose up 
+$ docker-compose up
 ```
 
 ## Or put in your docker-compose.yaml
@@ -21,10 +21,10 @@ $ docker-compose up
     container_name: lazytainer
     image: ghcr.io/vmorganp/lazytainer:master
     environment:
-      - PORT=81               # comma separated list of ports...or just the one 
+      - PORT=81               # comma separated list of ports...or just the one
       - LABEL=lazytainer      # value of lazytainer.marker for other containers that lazytainer checks
       # - TIMEOUT=30          # OPTIONAL number of seconds to let container idle
-      # - MINPACKETTHRESH=10  # OPTIONAL number of packets that must be recieved to keepalive/start container 
+      # - MINPACKETTHRESH=10  # OPTIONAL number of packets that must be recieved to keepalive/start container
       # - POLLRATE=1          # OPTIONAL number of seconds to sleep between polls
       # - VERBOSE=true        # probably set this to false unless you're debugging or doing the initial demo
     ports:
@@ -38,7 +38,7 @@ $ docker-compose up
     # configuring service ports is container specific. Look up how to do this on your service of choice
     command: --port 81  # make this run on the port passed through on lazytainer
     network_mode: service:lazytainer
-    depends_on: 
+    depends_on:
       - lazytainer # wait for lazytainer to start before starting
     labels:
       - "lazytainer.marker=lazytainer"  # required label to make it work

docker-compose.yaml

@@ -4,10 +4,10 @@ services:
     container_name: lazytainer
     image: ghcr.io/vmorganp/lazytainer:master
     environment:
-      - PORT=81,82          # comma separated list of ports...or just the one 
+      - PORT=81,82          # comma separated list of ports...or just the one
       - LABEL=lazytainer    # value of lazytainer.marker for other containers that lazytainer checks
       - TIMEOUT=30          # OPTIONAL number of seconds to let container idle
-      - MINPACKETTHRESH=10  # OPTIONAL number of packets that must be recieved to keepalive/start container 
+      - MINPACKETTHRESH=10  # OPTIONAL number of packets that must be recieved to keepalive/start container
       - POLLRATE=1          # OPTIONAL number of seconds to sleep between polls
       - VERBOSE=true        # probably set this to false unless you're debugging or doing the initial demo
     ports:
@@ -21,7 +21,7 @@ services:
     image: containous/whoami
     command: --port 81
     network_mode: service:lazytainer
-    depends_on: 
+    depends_on:
       - lazytainer
     labels:
       - "lazytainer.marker=lazytainer"
@@ -32,7 +32,7 @@ services:
     image: containous/whoami
     command: --port 82
     network_mode: service:lazytainer
-    depends_on: 
+    depends_on:
       - lazytainer
     labels:
       - "lazytainer.marker=lazytainer"