first commit

.gitignore

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+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+/kubectl-dfi
+_output/
+coverage.txt

.goreleaser.yml

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+---
+env:
+  - GO111MODULE=on
+before:
+  hooks:
+    - go mod download
+builds:
+  - 
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - darwin
+      - windows
+    goarch:
+      - amd64
+    main: cmd/kubectl-free/root.go
+    binary: kubectl-free
+archives:
+  -
+    name_template: "{{ .ProjectName }}_{{ .Version }}_{{ .Os }}_{{ .Arch }}"
+    replacements:
+      darwin: Darwin
+      linux: Linux
+      windows: Windows
+      amd64: x86_64
+    wrap_in_directory: true
+    format: zip
+    files:
+      - LICENSE
+      - README.md
+checksum:
+  name_template: "{{ .ProjectName }}_checksums.txt"
+  algorithm: sha256
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'

.travis.yml

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+language: go
+
+go:
+  - 1.12.6
+
+env:
+  - GO111MODULE=on
+
+install: true
+
+before_script:
+  - go install github.com/golangci/golangci-lint/cmd/golangci-lint
+
+script:
+  - golangci-lint run -E stylecheck -E gocritic
+  - diff -u <(echo -n) <(gofmt -d .)
+  - go test -v -race -coverprofile coverage.txt $(go list ./... | grep -v /constants | grep -v /cmd/kubectl-free)
+
+after_script:
+  - bash <(curl -s https://codecov.io/bash)
+
+deploy:
+  - provider: script
+    skip_cleanup: true
+    script: curl -sL https://git.io/goreleaser | bash
+    on:
+      tags: true
+

LICENSE

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+MIT License
+
+Copyright (c) 2019 makocchi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

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+SHELL=/bin/bash -o pipefail
+
+GO ?= go
+GOLINT ?= golangci-lint
+
+COMMIT_HASH := $(shell git rev-parse --short HEAD 2> /dev/null || true)
+GIT_TAG := $(shell git describe --tags --dirty --always)
+
+LDFLAGS := -ldflags '-X main.commit=${COMMIT_HASH} -X main.date=$(shell date +%s) -X main.version=${GIT_TAG}'
+TESTPACKAGES := $(shell go list ./... | grep -v /constants | grep -v /cmd/)
+
+kubectl_free ?= _output/kubectl-free
+
+.PHONY: build
+build: clean ${kubectl_free}
+
+${kubectl_free}:
+	GO111MODULE=on CGO_ENABLED=0 $(GO) build ${LDFLAGS} -o $@ ./cmd/kubectl-free/root.go
+
+.PHONY: clean
+clean:
+	rm -Rf _output
+
+.PHONY: test
+test:
+	GO111MODULE=on $(GO) test -count=1 -v -race $(TESTPACKAGES)
+
+.PHONY: lint-install
+lint-install:
+	GO111MODULE=on ${GO} install github.com/golangci/golangci-lint/cmd/golangci-lint
+
+.PHONY: lint
+lint: 
+	GO111MODULE=on ${GOLINT} run -E stylecheck -E gocritic
+
+.PHONY: fmt
+fmt: 
+	${GO} fmt ./cmd/... ./pkg/...

README.md

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+# kubectl free
+
+[![Build Status](https://travis-ci.org/makocchi-git/kubectl-free.svg?branch=master)](https://travis-ci.org/makocchi-git/kubectl-free)
+[![Maintainability](https://api.codeclimate.com/v1/badges/b92591d00becc95b11ca/maintainability)](https://codeclimate.com/github/makocchi-git/kubectl-free/maintainability)
+[![Go Report Card](https://goreportcard.com/badge/github.com/makocchi-git/kubectl-free)](https://goreportcard.com/report/github.com/makocchi-git/kubectl-free)
+[![codecov](https://codecov.io/gh/makocchi-git/kubectl-free/branch/master/graph/badge.svg)](https://codecov.io/gh/makocchi-git/kubectl-free)
+[![kubectl plugin](https://img.shields.io/badge/kubectl-plugin-blue.svg)](https://github.com/topics/kubectl-plugin)
+[![MIT License](http://img.shields.io/badge/license-MIT-blue.svg?style=flat)](LICENSE)
+
+Print pod resources/limits usage on Kubernetes node(s) like a linux "free" command.  
+
+```shell
+$ kubectl free
+NAME    STATUS   CPU/req   CPU/alloc   CPU/%   MEM/req   MEM/alloc   MEM/%
+node1   Ready    350m      3600m       9%      73400K    5943865K    1%
+node2   Ready    553m      3600m       15%     216006K   5943865K    3%
+node3   Ready    455m      2           22%     52428K    3503149K    1%
+```
+
+And list containers of pod on Kubernetes node(s).
+
+```shell
+$ kubectl free --list node1
+NODE NAME   POD                                   POD IP        POD STATUS   NAMESPACE     CONTAINER            CPU/req   CPU/lim   MEM/req   MEM/lim
+node1       calico-node-sml6z                     10.8.2.87     Running      kube-system   calico-node          250m      -         -         -
+node1       coredns-5695fb77c8-knc6d              10.112.1.3    Running      kube-system   coredns              100m      -         73400K    178257K
+node1       kube-state-metrics-5f4459f5b8-7hrwz   10.112.1.42   Running      kube-system   kube-state-metrics   103m      103m      111149K   111149K
+node1       kube-state-metrics-5f4459f5b8-7hrwz   10.112.1.42   Running      kube-system   addon-resizer        100m      100m      31457K    31457K
+...
+```
+
+## Install
+
+```shell
+$ make
+$ mv _output/kubectl-free /usr/local/bin/.
+
+# Happy free time!
+$ kubectl free
+```
+
+## Usage
+
+```shell
+# Show pod resource usage of Kubernetes nodes.
+kubectl free
+
+# Show pod resource usage of Kubernetes nodes with number of pods and containers.
+kubectl free --pod
+
+# Using label selector.
+kubectl free -l key=value
+
+# Print raw(bytes) usage.
+kubectl free --bytes --without-unit
+
+# Using binary prefix unit (GiB, MiB, etc)
+kubectl free -g -B
+
+# List resources of containers in pods on nodes.
+kubectl free --list
+
+# List resources of containers in pods on nodes with image information.
+kubectl free --list --list-image
+
+# Print container even if that has no resources/limits.
+kubectl free --list --list-all
+
+# Do you like emoji? 😃
+kubectl free --emoji
+kubectl free --list --emoji
+```
+
+## License
+
+This software is released under the MIT License.

cmd/kubectl-free/root.go

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+package main
+
+import (
+	"os"
+
+	"github.com/makocchi-git/kubectl-free/pkg/cmd"
+	"github.com/spf13/pflag"
+
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+)
+
+var (
+	// for goreleaser
+	// https://goreleaser.com/customization/#Builds
+	version = "master"
+	commit  = "unknown"
+	date    = "unknown"
+)
+
+func main() {
+	flags := pflag.NewFlagSet("kubectl-free", pflag.ExitOnError)
+	pflag.CommandLine = flags
+
+	root := cmd.NewCmdFree(
+		genericclioptions.IOStreams{In: os.Stdin, Out: os.Stdout, ErrOut: os.Stderr},
+		version,
+		commit,
+		date,
+	)
+	if err := root.Execute(); err != nil {
+		os.Exit(1)
+	}
+}

go.mod

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+module github.com/makocchi-git/kubectl-free
+
+go 1.12
+
+require (
+	github.com/gookit/color v1.1.7
+	github.com/spf13/cobra v0.0.2
+	github.com/spf13/pflag v1.0.1
+	k8s.io/api v0.0.0-20190531132109-d3f5f50bdd94
+	k8s.io/apimachinery v0.0.0-20190531131812-859a0ba5e71a
+	k8s.io/cli-runtime v0.0.0-20190531135611-d60f41fb4dc3
+	k8s.io/client-go v11.0.0+incompatible
+	k8s.io/kubernetes v1.14.3
+)
+
+replace (
+	github.com/Sirupsen/logrus => github.com/sirupsen/logrus v1.4.2
+	github.com/docker/docker => github.com/moby/moby v0.7.3-0.20190607191414-238f8eaa31aa
+	github.com/russross/blackfriday => github.com/russross/blackfriday v1.5.2
+	k8s.io/client-go => k8s.io/client-go v0.0.0-20190531132438-d58e65e5f4b1
+	k8s.io/kubernetes => k8s.io/kubernetes v1.14.2
+)