From 6ce7c61f81396b7511c19072ffbd3ef9ae9f56d4 Mon Sep 17 00:00:00 2001 From: Oleksandr Tymchyshyn Date: Sat, 13 Jun 2020 23:37:41 -0700 Subject: [PATCH] Add namespace pattern support --- README.md | 121 ++++++++++++++++----------- TODO.md | 17 ---- cmd/get.go | 42 ++-------- cmd/root.go | 69 ++++++++++++++-- go.mod | 5 +- go.sum | 166 ++------------------------------------ pkg/kubeagg/contexts.go | 45 ++++++++--- pkg/kubeagg/kubectl.go | 42 ++++++++++ pkg/kubeagg/main.go | 80 +++++------------- pkg/kubeagg/namespaces.go | 83 +++++++++++++++++++ pkg/kubeagg/objects.go | 35 ++++++++ pkg/kubeagg/output.go | 55 ++++++------- pkg/kubeagg/types.go | 98 +++++++++++++++++----- pkg/kubeagg/utils.go | 22 +++++ 14 files changed, 492 insertions(+), 388 deletions(-) delete mode 100644 TODO.md create mode 100644 pkg/kubeagg/kubectl.go create mode 100644 pkg/kubeagg/namespaces.go create mode 100644 pkg/kubeagg/objects.go create mode 100644 pkg/kubeagg/utils.go diff --git a/README.md b/README.md index c64a0e5..47b0982 100644 --- a/README.md +++ b/README.md @@ -1,66 +1,91 @@ # Kubectl Aggregate + ![](https://github.com/daftping/kubeagg/workflows/Go/badge.svg) ![Release](https://github.com/daftping/kubeagg/workflows/Release/badge.svg) -Kubectl wrapper to run against multiple contexts. +Kubectl wrapper to run against multiple contexts and namespaces. kubeagg features which are not available in kubectl: -- provide multiple context (literally or as pattern) +- get objects from multiple context (as list or as pattern) +- get objects from multiple namespaces (as list or as pattern) + +## Usage -# Usage ```bash -Kubectl wrapper to run against multiple contexts +Kubectl wrapper can get any objects in any cluster in any namespace. + + You can provide list of contexts or context-pattern (regexp) + If object you are trying to get namespaced you can provide list of + namespaces or namespace-pattern (regexp) Usage: - kubeagg get [flags] + kubeagg [command] + +Examples: + // Get namespaces from all contexts in (kubectl config view) + kubeagg get ns + + // Get pods from contexts matched 'dev$|test$' regexp and in + // namespaces matched 'default|test|dev' regexp + kubeagg \ + --context-pattern='dev$|test$' \ + --namespace-pattern='default|test|dev' \ + get pod + + // Get all nodes in "docker-desktop" and "test" contexts + kubeagg --contexts=docker-desktop,test get no + +Available Commands: + get Kubectl wrapper to run against multiple contexts and namespaces + help Help about any command Flags: - -p, --context-pattern string Send request to contexts matched provided regexp. Ignored if --contexts is provided. (default ".*") - -c, --contexts strings Send request to provided contexts. Has precedence over --context-pattern.(default: '', --context-pattern is used) - -h, --help help for get - -n, --namespace string Namespace to operate in. (default "default") - -o, --output string Output format. Supported values: table, wide, json. (default "table") - -Global Flags: - -l, --loglevel string Debug, Info, Warn, Error, Fatal (default "Error") + --context-pattern string Send request to contexts matched provided regexp. + Ignored if --contexts is provided. (default ".*") + --contexts strings Send request to provided contexts. Has precedence over --context-pattern. + (default: '', --context-pattern is used) + -h, --help help for kubeagg + -l, --loglevel string Debug, Info, Warn, Error, Fatal (default "Error") + --namespace-pattern string Get objects from namespaces matched provided regexp. + Ignored if --namespaces is provided. (default ".*") + -n, --namespaces strings List namespaces to get objects from.(default: '', --namespace-pattern is used) + --no-headers Skip headers in output + -o, --output string Output format. Supported values: table, json. (default "table") + +Use "kubeagg [command] --help" for more information about a command. ``` -## All contexts in ~/.kube/config + +## Get namespaces in all contexts in ~/.kube/config + ```bash kubeagg get ns -CONTEXT NAME -prod-a default -prod-a kube-public -prod-a kube-system -test-a default -test-a kube-public -test-a kube-system -test-b default -test-b kube-public -test-b kube-system -test-c default -test-c kube-public -test-c kube-system -``` -## List of selected namespaces -```bash -kubeagg get ns --contexts=test-a,test-b -o wide -CONTEXT TYPE NAME -test-a ns default -test-a ns kube-public -test-a ns kube-system -test-b ns default -test-b ns kube-public -test-b ns kube-system +CONTEXT NAMESPACE TYPE NAME +docker-desktop n\a Namespace default +docker-desktop n\a Namespace docker +docker-desktop n\a Namespace kube-node-lease +docker-desktop n\a Namespace kube-public +docker-desktop n\a Namespace kube-system +prod-a n\a Namespace default +prod-a n\a Namespace kube-public +prod-a n\a Namespace kube-system +test-a n\a Namespace default +test-a n\a Namespace kube-public +test-a n\a Namespace kube-system +test-b n\a Namespace default +test-b n\a Namespace kube-public +test-b n\a Namespace kube-system ``` -## Regexp matched deployments -```bash -kubeagg get deploy --context-pattern='test-[b|c]$' --namespace=kube-system -o wide -CONTEXT TYPE NAME -test-b deploy cluster-autoscaler -test-b deploy kube-dns -test-b deploy metrics-server -test-c deploy cluster-autoscaler -test-c deploy kube-dns -test-c deploy metrics-server +## Get pod from contexts matched pattern and namespaces matched pattern + +```bash +kubeagg \ + --context-pattern='^docker-desktop$|^test' \ + --namespace-pattern='default|-public$' \ + get pod +CONTEXT NAMESPACE TYPE NAME +docker-desktop default Pod kubeagg +docker-desktop default Pod kubeagg-68898df575-hcvs5 +test-a default Pod kubeagg2 +test-a kube-public Pod kubeagg3 ``` diff --git a/TODO.md b/TODO.md deleted file mode 100644 index 9655f17..0000000 --- a/TODO.md +++ /dev/null @@ -1,17 +0,0 @@ -- Wildcards -- Docs as code -- Tests -- Tag based version -- Commandline - - Update description -- README - - Gif -- Config - - ENV var - - Config file -- Autocompletion -- Kubeagg search -- Add support for - - --all-namespace - - multiple namespace - - multiple objects \ No newline at end of file diff --git a/cmd/get.go b/cmd/get.go index b383b92..7fc5427 100644 --- a/cmd/get.go +++ b/cmd/get.go @@ -10,16 +10,14 @@ var getConfig kubeagg.Config // getCmd represents the get command var getCmd = &cobra.Command{ Use: "get", - Short: "Kubectl wrapper to run against multiple contexts", - // Long: `A longer description that spans multiple lines and likely contains examples - // and usage of using your command. For example: - - // Cobra is a CLI library for Go that empowers applications. - // This application is a tool to generate the needed files - // to quickly create a Cobra application.`, + Short: "Kubectl wrapper to run against multiple contexts and namespaces", Run: func(cmd *cobra.Command, args []string) { - // TODO Check for null - getConfig.ObjectType = args[0] + if len(args) > 0 { + getConfig.ObjectType = args[0] + } else { + getConfig.ObjectType = "all" + } + kubeagg.SetGlobalConfig(GlobalConfig) kubeagg.SetConfig(getConfig) kubeagg.Run() @@ -34,30 +32,4 @@ var getCmd = &cobra.Command{ func init() { rootCmd.AddCommand(getCmd) - - getCmd.PersistentFlags().StringVarP( - &getConfig.Output, - "output", "o", - "table", - "Output format. Supported values: table, wide, json.", - ) - getCmd.PersistentFlags().StringVarP( - &getConfig.Namespace, - "namespace", "n", - "default", - "Namespace to operate in.", - ) - getCmd.PersistentFlags().StringSliceVarP( - &getConfig.Contexts, - "contexts", "c", - []string{}, - "Send request to provided contexts. Has precedence over --context-pattern."+ - "(default: '', --context-pattern is used)", - ) - getCmd.PersistentFlags().StringVarP( - &getConfig.ContextPattern, - "context-pattern", "p", - ".*", - "Send request to contexts matched provided regexp. Ignored if --contexts is provided.", - ) } diff --git a/cmd/root.go b/cmd/root.go index dbc1e81..0ed3b0b 100644 --- a/cmd/root.go +++ b/cmd/root.go @@ -15,13 +15,27 @@ var GlobalConfig kubeagg.GlobalConfig // rootCmd represents the base command when called without any subcommands var rootCmd = &cobra.Command{ Use: "kubeagg", - Short: "Kubectl wrapper to run against multiple contexts", - // Long: `A longer description that spans multiple lines and likely contains - // examples and usage of using your application. For example: + Short: "Kubectl wrapper to run against multiple contexts and namespaces", + Long: `Kubectl wrapper can get any objects in any cluster in any namespace. + + You can provide list of contexts or context-pattern (regexp) + If object you are trying to get namespaced you can provide list of + namespaces or namespace-pattern (regexp) +`, + Example: ` + // Get namespaces from all contexts in (kubectl config view) + kubeagg get ns - // Cobra is a CLI library for Go that empowers applications. - // This application is a tool to generate the needed files - // to quickly create a Cobra application.`, + // Get pods from contexts matched 'dev$|test$' regexp and in + // namespaces matched 'default|test|dev' regexp + kubeagg \ + --context-pattern='dev$|test$' \ + --namespace-pattern='default|test|dev' \ + get pod + + // Get all nodes in "docker-desktop" and "test" contexts + kubeagg --contexts=docker-desktop,test get no + `, // Uncomment the following line if your bare application // has an action associated with it: @@ -51,6 +65,49 @@ func init() { "Debug, Info, Warn, Error, Fatal", ) + rootCmd.PersistentFlags().StringVarP( + &GlobalConfig.Output, + "output", "o", + "table", + "Output format. Supported values: table, wide, json.", + ) + + rootCmd.PersistentFlags().StringSliceVar( + &GlobalConfig.Contexts, + "contexts", + []string{}, + "Send request to provided contexts. Has precedence over --context-pattern."+ + "(default: '', --context-pattern is used)", + ) + rootCmd.PersistentFlags().StringVar( + &GlobalConfig.ContextPattern, + "context-pattern", + ".*", + "Send request to contexts matched provided regexp. Ignored if --contexts is provided.", + ) + + rootCmd.PersistentFlags().BoolVar( + &GlobalConfig.NoHeaders, + "no-headers", + false, + "Skip headers in output", + ) + + rootCmd.PersistentFlags().StringSliceVarP( + &GlobalConfig.Namespaces, + "namespaces", "n", + []string{}, + "List namespaces to get objects from."+ + "(default: '', --namespace-pattern is used)", + ) + + rootCmd.PersistentFlags().StringVar( + &GlobalConfig.NamespacePattern, + "namespace-pattern", + ".*", + "Get objects from namespaces matched provided regexp. Ignored if --namespaces is provided.", + ) + } // initConfig reads in config file and ENV variables if set. diff --git a/go.mod b/go.mod index 9568745..2613643 100644 --- a/go.mod +++ b/go.mod @@ -3,8 +3,9 @@ module github.com/daftping/kubeagg go 1.14 require ( - github.com/mitchellh/go-homedir v1.1.0 github.com/spf13/cobra v1.0.0 - github.com/spf13/viper v1.7.0 + github.com/spf13/pflag v1.0.5 // indirect go.uber.org/zap v1.15.0 + golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc // indirect + gopkg.in/yaml.v2 v2.2.4 // indirect ) diff --git a/go.sum b/go.sum index d6ea548..4d0a5b0 100644 --- a/go.sum +++ b/go.sum @@ -1,37 +1,17 @@ cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= -cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= -cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= -cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= -cloud.google.com/go 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github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04= -github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU= github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as= github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE= github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk= @@ -54,56 +32,20 @@ github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zV github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q= github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc= github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A= -github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A= -github.com/golang/mock 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v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc= -google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= -google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= -google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= -google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= -google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc= -google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc= -google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= -google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= -google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38= google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= -google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY= gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI= -gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno= -gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k= gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo= gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74= gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= @@ -329,7 +179,5 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I= gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= -honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= -honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM= honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= -rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8= diff --git a/pkg/kubeagg/contexts.go b/pkg/kubeagg/contexts.go index 07786cf..170dde7 100644 --- a/pkg/kubeagg/contexts.go +++ b/pkg/kubeagg/contexts.go @@ -6,24 +6,51 @@ import ( "regexp" ) -// GetContexts make a decision weather use --contexts or --context-pattern -// returns list of contexts -func GetContexts() []string { +// GetContexts make a decision whether use --contexts or --context-pattern +func (c *Contexts) GetContexts() { // Check if contexts is provided, empty slice by default. // --contexts has precedence over --context-pattern // --context-pattern is ignored - if len(getConfigVar.Contexts) > 0 { + if len(globalConfigVar.Contexts) > 0 { //Support * as context. //Does it make sense? //TODO probably should add * as prefix and suffix for those who doesn't like regexp like me )) if isWildcard() { - return GetAllContexts() + c.Append(GetAllContexts()) + return } - return getConfigVar.Contexts + //Add provided contexts as is + c.Append(globalConfigVar.Contexts) + sugar.Debugw( + "Contexts to process", + "contexts", c.GetContextsNames(), + ) + return } - // If context pattern is used return list of contexts - return GetContextsByPattern(getConfigVar.ContextPattern) + // If context pattern is used resolve pattern and add to Contexts + c.Append(GetContextsByPattern(globalConfigVar.ContextPattern)) + sugar.Debugw( + "Contexts to process", + "contexts", c.GetContextsNames(), + ) + return +} + +// Append convert []string to []Context and append to Contexts +func (c *Contexts) Append(contexts []string) { + for _, context := range contexts { + c.Contexts = append(c.Contexts, Context{ + Name: context, + }) + } +} + +func (c *Contexts) GetContextsNames() (s []string) { + for _, context := range c.Contexts { + s = append(s, context.Name) + } + return } // GetContextsByPattern converts context pattern regexp into slice of contexts @@ -39,7 +66,7 @@ func GetContextsByPattern(pattern string) (contexts []string) { // Check if any of provided contexts is * func isWildcard() bool { - for _, context := range getConfigVar.Contexts { + for _, context := range globalConfigVar.Contexts { if context == "*" { return true } diff --git a/pkg/kubeagg/kubectl.go b/pkg/kubeagg/kubectl.go new file mode 100644 index 0000000..9e66a51 --- /dev/null +++ b/pkg/kubeagg/kubectl.go @@ -0,0 +1,42 @@ +package kubeagg + +import ( + "encoding/json" + "os/exec" +) + +const ( + // kubectl executable + kubectl = "kubectl" +) + +// GetObjectsFromContext get objects from individual context +func GetObjectsFromContext(args []string) (list List) { + sugar.Debugf("Running: %v %v", kubectl, args) + + out, err := exec.Command(kubectl, args...).Output() + if err != nil { + sugar.Fatal(err) + } + + errJSON := json.Unmarshal(out, &list) + if errJSON != nil { + sugar.Fatal(errJSON) + } + return +} + +// GetArgs get arguments for kubectl +func GetKubectlArgs(context string, namespace string, objectType string) (args []string) { + args = []string{ + "get", + objectType, + "--output=json", + "--context", context, + } + + if namespace != "" { + args = append(args, "--namespace="+namespace) + } + return +} diff --git a/pkg/kubeagg/main.go b/pkg/kubeagg/main.go index 9770b82..01d1019 100644 --- a/pkg/kubeagg/main.go +++ b/pkg/kubeagg/main.go @@ -1,71 +1,31 @@ package kubeagg -import ( - "encoding/json" - "os/exec" - "sync" -) +import "sync" -// Run package entrypoint -func Run() { - - // Generate final contexts lists - contexts := GetContexts() - sugar.Debugw( - "Contexts to precess", - "contexts", contexts, - ) - - // Async context processing - var ( - wg sync.WaitGroup - allObject AllObjects - ) - - for _, context := range contexts { - wg.Add(1) - go func(context string) { - allObject.Lists = append(allObject.Lists, GetFromContext(context)) - wg.Done() - }(context) - - } - wg.Wait() - - // Sync - // var allObject AllObjects - - // for _, context := range contexts { - // allObject.Lists = append(allObject.Lists, GetFromContext(context)) - // } - - // Output results - allObject.Output(getConfigVar.Output) +// New return Contexts object +func New() *Contexts { + contexts := Contexts{} + contexts.WaitGroup = sync.WaitGroup{} + return &contexts } -// GetFromContext get objects from individual context -func GetFromContext(context string) (ctxObjects List) { - args := []string{ - "get", - getConfigVar.ObjectType, - "--output=json", - "--context", context, - "--namespace", getConfigVar.Namespace, - } +// Run package entrypoint +func Run() { + // Get reference to Contexts object + c := New() - sugar.Debugf("Running: %v %v", kubectl, args) + // Populate contexts + c.GetContexts() - out, err := exec.Command(kubectl, args...).Output() - if err != nil { - sugar.Fatal(err) - } + // Handle namespaced and non namespaced object differently + if contains(GetNonNamespacedObjects(), getConfigVar.ObjectType) { + c.PopulateNonNamespacedObjectsAsync() - errJSON := json.Unmarshal(out, &ctxObjects) - if errJSON != nil { - sugar.Fatal(errJSON) + } else { + c.GetNamespaces() + c.PopulateNamespacedObjectsAsync() } - ctxObjects.Context = context - - return + // Output in provided format + c.Output(globalConfigVar.Output) } diff --git a/pkg/kubeagg/namespaces.go b/pkg/kubeagg/namespaces.go new file mode 100644 index 0000000..ad1bbec --- /dev/null +++ b/pkg/kubeagg/namespaces.go @@ -0,0 +1,83 @@ +package kubeagg + +import "regexp" + +// GetNamespaces Stub for namespace parsing logic +func (c *Contexts) GetNamespaces() { + // Check if namespaces is provided, empty slice by default. + // --namespaces has precedence over --namespace-pattern + // --namespace-pattern is ignored + // if --namespaces is provided, fill in Contexts struct with namespaces + if len(globalConfigVar.Namespaces) > 0 { + //TODO probably should add * as prefix and suffix for those who doesn't like regexp like me )) + for i := 0; i < len(c.Contexts); i++ { + for _, ns := range globalConfigVar.Namespaces { + c.Contexts[i].Namespaces = append( + c.Contexts[i].Namespaces, + Namespace{ + Name: ns, + }, + ) + } + } + sugar.Debugw( + "Aggregated uniq list of namespaces to process", + "namespaces", c.GetNamespacesNames(), + ) + return + } + + // If namespace pattern is used + c.PopulateNamespacesByPatternAsync() + sugar.Debugw( + "Aggregated uniq list of namespaces to process", + "namespaces", c.GetNamespacesNames(), + ) +} + +//GetNamespacesNames helped function for debug output +func (c *Contexts) GetNamespacesNames() (s []string) { + for _, context := range c.Contexts { + for _, namespace := range context.Namespaces { + s = append(s, namespace.Name) + } + } + + return unique(s) +} + +// GetNamespacesByPattern filter out namespaces by pattern +func GetContextNamespacesByPattern(pattern string, allNamespaces List) (filteredNamespaces []Namespace) { + var desiredNamespaces = regexp.MustCompile(pattern) + for _, namespace := range allNamespaces.Items { + if desiredNamespaces.MatchString(namespace.Metadata.Name) { + filteredNamespaces = append( + filteredNamespaces, + Namespace{ + Name: namespace.Metadata.Name, + }, + ) + } + } + return +} + +func (c *Contexts) PopulateNamespacesByPatternAsync() { + sugar.Debugf("Namespace pattern is used: %v", globalConfigVar.NamespacePattern) + sugar.Debug("Getting namespaces from contexts") + + for i := 0; i < len(c.Contexts); i++ { + c.WaitGroup.Add(1) + go func(i int) { + Namespaces := GetObjectsFromContext( + GetKubectlArgs(c.Contexts[i].Name, "", "namespace"), + ) + // Assign filtered namespaces + c.Contexts[i].Namespaces = GetContextNamespacesByPattern(globalConfigVar.NamespacePattern, Namespaces) + c.WaitGroup.Done() + }(i) + } + sugar.Debug("Waiting for all requests to complete") + c.WaitGroup.Wait() + return +} diff --git a/pkg/kubeagg/objects.go b/pkg/kubeagg/objects.go new file mode 100644 index 0000000..dfc6e68 --- /dev/null +++ b/pkg/kubeagg/objects.go @@ -0,0 +1,35 @@ +package kubeagg + +func (c *Contexts) PopulateNamespacedObjectsAsync() { + sugar.Debugf("Getting object: %v", getConfigVar.ObjectType) + for i := 0; i < len(c.Contexts); i++ { + c.WaitGroup.Add(1) + go func(i int) { + for j := 0; j < len(c.Contexts[i].Namespaces); j++ { + c.Contexts[i].Namespaces[j].Objects = GetObjectsFromContext( + GetKubectlArgs(c.Contexts[i].Name, c.Contexts[i].Namespaces[j].Name, getConfigVar.ObjectType), + ) + } + c.WaitGroup.Done() + }(i) + } + sugar.Debug("Waiting for all requests to complete") + c.WaitGroup.Wait() + return +} + +func (c *Contexts) PopulateNonNamespacedObjectsAsync() { + sugar.Debugf("Getting object: %v", getConfigVar.ObjectType) + for i := 0; i < len(c.Contexts); i++ { + c.WaitGroup.Add(1) + go func(i int) { + c.Contexts[i].NonNamespaced = GetObjectsFromContext( + GetKubectlArgs(c.Contexts[i].Name, "", getConfigVar.ObjectType), + ) + c.WaitGroup.Done() + }(i) + } + sugar.Debug("Waiting for all requests to complete") + c.WaitGroup.Wait() + return +} diff --git a/pkg/kubeagg/output.go b/pkg/kubeagg/output.go index 8b35e7f..1641329 100644 --- a/pkg/kubeagg/output.go +++ b/pkg/kubeagg/output.go @@ -9,56 +9,51 @@ import ( ) // Output in provided format -func (objects AllObjects) Output(output string) { - switch output { +func (c *Contexts) Output(outputType string) { + switch outputType { case "json": - objects.PrintJSON() + c.OutputJSON() case "table": - objects.PrintTable() - case "wide": - objects.PrintWide() + c.OutputTable() + // case "wide": + // objects.PrintWide() default: - sugar.Warnf("Output type %v is not supported, supported values is json, table, wide", output) + sugar.Warnf("Output type %v is not supported, supported values is json, table, wide", outputType) } } // PrintTable in table format -func (objects AllObjects) PrintTable() { +func (c *Contexts) OutputTable() { w := new(tabwriter.Writer) // minwidth, tabwidth, padding, padchar, flags w.Init(os.Stdout, 8, 8, 0, '\t', 0) defer w.Flush() - fmt.Fprintf(w, "%s\t%s\t", "CONTEXT", "NAME") + if !globalConfigVar.NoHeaders { + fmt.Fprintf(w, "%s\t%s\t%s\t%s\t", "CONTEXT", "NAMESPACE", "TYPE", "NAME") + } - for _, list := range objects.Lists { - for _, item := range list.Items { - fmt.Fprintf(w, "\n %v\t%v", list.Context, item.Metadata.Name) + // Namespaced + for i := 0; i < len(c.Contexts); i++ { + for j := 0; j < len(c.Contexts[i].Namespaces); j++ { + for _, object := range c.Contexts[i].Namespaces[j].Objects.Items { + fmt.Fprintf(w, "\n%v\t%v\t%v\t%v", c.Contexts[i].Name, c.Contexts[i].Namespaces[j].Name, object.Kind, object.Metadata.Name) + } } } - fmt.Fprintln(w, "") -} - -// PrintWide same as PrintTable but with additional fields -func (objects AllObjects) PrintWide() { - w := new(tabwriter.Writer) - // minwidth, tabwidth, padding, padchar, flags - w.Init(os.Stdout, 8, 8, 0, '\t', 0) - defer w.Flush() - - fmt.Fprintf(w, "%s\t%s\t%s\t%s\t", "CONTEXT", "TYPE", "NAME", "STATUS") - - for _, list := range objects.Lists { - for _, item := range list.Items { - fmt.Fprintf(w, "\n %v\t%v\t%v\t%v", list.Context, item.Kind, item.Metadata.Name, item.Status.Phase) + // NonNamespaced + for i := 0; i < len(c.Contexts); i++ { + for _, object := range c.Contexts[i].NonNamespaced.Items { + fmt.Fprintf(w, "\n%v\t%v\t%v\t%v", c.Contexts[i].Name, "n\\a", object.Kind, object.Metadata.Name) } } + fmt.Fprintln(w, "") + } -// PrintJSON output in JSON format -func (objects AllObjects) PrintJSON() { - json, err := json.MarshalIndent(objects, "", " ") +func (c *Contexts) OutputJSON() { + json, err := json.MarshalIndent(c, "", " ") if err != nil { log.Fatal(err) } diff --git a/pkg/kubeagg/types.go b/pkg/kubeagg/types.go index bd14494..0204bc6 100644 --- a/pkg/kubeagg/types.go +++ b/pkg/kubeagg/types.go @@ -1,49 +1,103 @@ package kubeagg -const ( - // kubectl executable - kubectl = "kubectl" +import ( + "sync" + "time" ) +// GetNonNamespacedObjects get non namespaced objects +// Should remove this hardcode and make decision based on cluster objects types +// # In a namespace +// kubectl api-resources --namespaced=true +// # Not in a namespace +// kubectl api-resources --namespaced=false +func GetNonNamespacedObjects() []string { + return []string{ + "componentstatuses", "cs", + "namespaces", "ns", + "node", "nodes", "no", + "persistentvolumes", "pv", + "mutatingwebhookconfigurations", + "validatingwebhookconfigurations", + "customresourcedefinitions", "crd", "crds", + "apiservices", + "tokenreviews", + "selfsubjectaccessreviews", + "selfsubjectrulesreviews", + "subjectaccessreviews", + "certificatesigningrequests", "csr", + "compositecontrollers", "cc", "cctl", + "decoratorcontrollers", "dec", "decorators", + "runtimeclasses", + "podsecuritypolicies", "psp", + "clusterrolebindings", + "clusterroles", + "priorityclasses", "pc", + "csidrivers", + "csinodes", + "storageclasses", "sc", + "volumeattachments", + } +} + +// Configs passed from commandline // + // GlobalConfig global command line parameters values type GlobalConfig struct { - LogLevel string + LogLevel string + Output string + NoHeaders bool + Contexts []string + ContextPattern string + Namespaces []string + NamespacePattern string } // Config set command command line parameters values type Config struct { - Output string - Namespace string - ObjectType string - Contexts []string - ContextPattern string + ObjectType string } -// List of items in context -type List struct { - Items []Object - Context string -} +// Kubernetes JSON structure -// Object any object in the context +// Object Kubernetes object root structure type Object struct { Kind string Metadata Metadata Status Status } -// Status of the object +//List of kubernetes objects +type List struct { + Items []Object +} + +// Status kubernetes objects status type Status struct { Phase string } -// Metadata of the object +// Metadata kubernetes object metadata type Metadata struct { - Name string + Name string + Namespace string + CreationTimestamp time.Time +} + +// Aggregated structure + +type Contexts struct { + Contexts []Context + WaitGroup sync.WaitGroup +} + +type Context struct { + Name string + Namespaces []Namespace + NonNamespaced List } -// AllObjects aggregated list of all contexts -type AllObjects struct { - Lists []List - Type string +type Namespace struct { + Name string + Objects List } diff --git a/pkg/kubeagg/utils.go b/pkg/kubeagg/utils.go new file mode 100644 index 0000000..aa72ecd --- /dev/null +++ b/pkg/kubeagg/utils.go @@ -0,0 +1,22 @@ +package kubeagg + +func unique(stringSlice []string) []string { + keys := make(map[string]bool) + list := []string{} + for _, entry := range stringSlice { + if _, value := keys[entry]; !value { + keys[entry] = true + list = append(list, entry) + } + } + return list +} + +func contains(s []string, e string) bool { + for _, a := range s { + if a == e { + return true + } + } + return false +}