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Merge pull request #2871 from ikaven1024/feature/lua-resource
add kube lib for lua
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93 changes: 93 additions & 0 deletions
93
pkg/resourceinterpreter/configurableinterpreter/luavm/kube.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package luavm | ||
|
|
||
| import ( | ||
| lua "github.com/yuin/gopher-lua" | ||
| corev1 "k8s.io/api/core/v1" | ||
| "k8s.io/apimachinery/pkg/api/resource" | ||
|
|
||
| "github.com/karmada-io/karmada/pkg/util/helper" | ||
| ) | ||
|
|
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| const ( | ||
| // KubeLibName is the name of the kube library. | ||
| KubeLibName = "kube" | ||
| ) | ||
|
|
||
| // KubeLoader loads the kube library. Import this library before your script by: | ||
| // | ||
| // local kube = require("kube") | ||
| // | ||
| // Then you can call functions in this library by: | ||
| // | ||
| // kube.xxx() | ||
| // | ||
| // This library Contains: | ||
| // - function resourceAdd(r1, r2, ...) | ||
| // accruing the quantity of resources. Example: | ||
| // cpu = kube.resourceAdd(r1.cpu, r2.cpu, r3.cpu) | ||
| // - function accuratePodRequirements(pod) requirements | ||
| // accurate total resource requirements for pod. Example: | ||
| // requirements = kube.accuratePodRequirements(pod) | ||
| func KubeLoader(ls *lua.LState) int { | ||
| mod := ls.SetFuncs(ls.NewTable(), kubeFuncs) | ||
| ls.Push(mod) | ||
| return 1 | ||
| } | ||
|
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| var kubeFuncs = map[string]lua.LGFunction{ | ||
| "resourceAdd": resourceAdd, | ||
| "accuratePodRequirements": accuratePodRequirements, | ||
| } | ||
|
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| func resourceAdd(ls *lua.LState) int { | ||
| res := resource.Quantity{} | ||
| n := ls.GetTop() | ||
| for i := 1; i <= n; i++ { | ||
| q := checkResourceQuantity(ls, i) | ||
| res.Add(q) | ||
| } | ||
|
|
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| s := res.String() | ||
| ls.Push(lua.LString(s)) | ||
| return 1 | ||
| } | ||
|
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| func accuratePodRequirements(ls *lua.LState) int { | ||
| n := ls.GetTop() | ||
| if n != 1 { | ||
| ls.RaiseError("getPodRequirements only accepts one argument") | ||
| return 0 | ||
| } | ||
|
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| v := ls.CheckTable(1) | ||
| pod := &corev1.PodTemplateSpec{} | ||
| err := ConvertLuaResultInto(v, pod) | ||
| if err != nil { | ||
| ls.RaiseError("fail to convert lua value %#v to PodTemplateSpec: %v", v, err) | ||
| return 0 | ||
| } | ||
|
|
||
| requirements := helper.GenerateReplicaRequirements(pod) | ||
| retValue, err := decodeValue(ls, requirements) | ||
| if err != nil { | ||
| ls.RaiseError("fail to convert %#v to Lua value: %v", requirements, err) | ||
| return 0 | ||
| } | ||
|
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||
| ls.Push(retValue) | ||
| return 1 | ||
| } | ||
|
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| func checkResourceQuantity(ls *lua.LState, n int) resource.Quantity { | ||
| v := ls.Get(n) | ||
| switch typ := v.Type(); typ { | ||
| case lua.LTNil: | ||
| return resource.Quantity{} | ||
| case lua.LTString: | ||
| s := string(v.(lua.LString)) | ||
| return resource.MustParse(s) | ||
| default: | ||
| ls.TypeError(n, lua.LTString) | ||
| return resource.Quantity{} | ||
| } | ||
| } |
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