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Main.elm
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Main.elm
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import Html exposing (..)
import Html.Attributes exposing (..)
import Html.Events exposing (..)
import Http
import Json.Decode as Decode
import Json.Decode.Extra as Decode exposing ((|:))
import Update.Extra exposing (andThen)
import Time
import Svg
import Svg.Attributes
import Collage
import Collage.Layout
import Collage.Render
import Collage.Text
import Color
import Dict
import String.Extra
import Debug
main =
Html.program
{ init = init
, view = view
, update = update
, subscriptions = subscriptions
}
-- VARS
api_server = "http://localhost:8001/k8s-api"
namespace = "default"
end_deployments = api_server ++ "/apis/apps/v1beta2/namespaces/" ++ namespace ++ "/deployments"
end_pods = api_server ++ "/api/v1/namespaces/" ++ namespace ++ "/pods"
end_replicasets = api_server ++ "/apis/apps/v1beta2/namespaces/" ++ namespace ++ "/replicasets"
end_svcs = api_server ++ "/api/v1/namespaces/" ++ namespace ++ "/services"
end_ings = api_server ++ "/apis/extensions/v1beta1/namespaces/" ++ namespace ++ "/ingresses"
pod_margin = 25
pod_width = 100
-- MODEL
type alias Metadata =
{ name: String
}
type alias Pods =
List Pod
type alias Svcs =
List Svc
type alias Pod =
{ name: String
, labels: Dict.Dict String String
, owner: String
, phase: String
, conditions: List (Dict.Dict String String)
, deletionTimestamp: Maybe String
}
type alias Ing =
{ name: String,
http_paths: List (List IngPath)
}
type alias IngPath =
{
path: String,
backend: String
}
type alias Svc =
{ name: String
, selectors: Maybe (Dict.Dict String String)
}
type alias Model =
{ deployments: List String
, replicasets: List String
, pods : List Pod
, svcs : List Svc
, ings : List Ing
}
emptyPod = { name = ""
, labels = Dict.empty
, owner = ""
, phase = ""
, conditions = []
}
init : (Model, Cmd Msg)
init =
( Model [] [] [] [] [],
getPods
)
-- UPDATE
type Msg
= Refresh
| Tick Time.Time
| GetPods
| GetSvcs
| GetIngs
| GetDeployments
| GetReplicaSets
| NewPods (Result Http.Error (Pods))
| NewSvcs (Result Http.Error (Svcs))
| NewIngs (Result Http.Error (List Ing))
| NewDeployments (Result Http.Error (List String))
| NewReplicaSets (Result Http.Error (List String))
update : Msg -> Model -> (Model, Cmd Msg)
update msg model =
case msg of
Refresh ->
model ! []
|> andThen update GetPods
|> andThen update GetDeployments
|> andThen update GetReplicaSets
|> andThen update GetSvcs
|> andThen update GetIngs
Tick time ->
model ! []
|> andThen update GetPods
|> andThen update GetDeployments
|> andThen update GetReplicaSets
|> andThen update GetSvcs
|> andThen update GetIngs
GetDeployments ->
(model, getDeployments)
GetPods ->
(model, getPods)
GetSvcs ->
(model, getSvcs)
GetIngs ->
(model, getIngs)
GetReplicaSets ->
(model, getReplicaSets)
NewPods (Ok value) ->
({model | pods = value}, Cmd.none)
NewPods (Err _) ->
(model, Cmd.none)
NewSvcs (Ok value) ->
( {model | svcs = value}, Cmd.none)
NewSvcs (Err _) ->
(model, Cmd.none)
NewIngs (Ok value) ->
( {model | ings = value}, Cmd.none)
NewIngs (Err _) ->
(model, Cmd.none)
NewDeployments (Ok value) ->
({model | deployments = value}, Cmd.none)
NewDeployments (Err _) ->
(model, Cmd.none)
NewReplicaSets (Ok value) ->
({model | replicasets = value}, Cmd.none)
NewReplicaSets (Err _) ->
(model, Cmd.none)
-- VIEW
view : Model -> Html Msg
view model =
div [ class "lists" ]
[ renderList "Services" (List.map .name model.svcs)
, renderList "Ingresses" (List.map .name model.ings)
, renderList "Deployments: " model.deployments
, renderList "ReplicaSets: " model.replicasets
, renderList "Pods: " (List.map .name model.pods)
, renderAll model.deployments model.replicasets model.pods model.svcs model.ings
]
renderList name lst =
div []
[ div [] [ text name]
, ul [] (List.map (\l -> li [] [ text l ]) lst)
]
filterPods: Dict.Dict String String -> Pods -> Pods
filterPods labels pods =
if not (Dict.isEmpty labels) then
pods
|> List.filter (hasLabels labels)
|> List.filter (\l -> l.deletionTimestamp == Nothing)
|> List.filter (\l -> l.phase == "Running")
else
[]
hasLabels: Dict.Dict String String -> Pod -> Bool
hasLabels labels pod =
let
kv_present: String -> String -> Bool
kv_present key value =
(Maybe.withDefault "" (Dict.get key pod.labels)) == value
in
labels
|> Dict.filter kv_present
|> Dict.isEmpty
|> not
renderAll : List String -> List String -> Pods -> Svcs -> List Ing -> Html.Html msg
renderAll deployments replicasets pods svcs ings =
let
deps =
List.map (renderDeployment replicasets pods) deployments
|> wrapH
resources =
[ renderIngs ings, renderSvcs svcs, deps ]
|> wrapV
traffic =
[ renderSvcs2Pods pods svcs resources ]
++ [ renderIng2Svcs ings resources ]
in
traffic
++ [ resources ]
|> Collage.Layout.stack
|> Collage.Render.svg
renderSvcs: Svcs -> Collage.Collage msg
renderSvcs svcs =
svcs
|> List.map (\l -> renderEmptyFrame 200 50 "svc-" l.name)
|> wrapH
renderIngPaths: Ing -> Collage.Collage msg
renderIngPaths ing =
ing.http_paths
|> List.foldr (++) []
|> List.sortBy .path
|> List.map (\l -> renderEmptyFrame 100 25 "ing-path-" l.path)
|> wrapH
renderEmptyFrame: Float -> Float -> String -> String -> Collage.Collage msg
renderEmptyFrame x y prefix name =
let
san_name =
String.Extra.replace "/" "" name
frame =
Collage.rectangle x y
|> Collage.filled (Collage.transparent)
|> Collage.Layout.name (prefix ++ san_name)
|> Collage.Layout.center
label =
Collage.Text.fromString name
|> Collage.rendered
|> Collage.Layout.name ("label-" ++ prefix ++ san_name)
|> Collage.Layout.center
in
[ label, frame ]
|> List.map (Collage.Layout.center)
|> Collage.Layout.stack
renderFrameAround: String -> String -> Collage.Collage msg -> Collage.Collage msg
renderFrameAround prefix name inner_content =
let
san_name =
String.Extra.replace "/" "" name
frame =
Collage.rectangle (Collage.Layout.width content) (Collage.Layout.height content)
|> Collage.filled (Collage.transparent)
|> Collage.Layout.name (prefix ++ san_name)
|> Collage.Layout.center
label =
Collage.Text.fromString name
|> Collage.rendered
|> Collage.Layout.name ("label-" ++ prefix ++ san_name)
|> Collage.Layout.center
content =
[ label, inner_content ]
|> Collage.Layout.vertical
in
[ content, frame ]
|> List.map (Collage.Layout.center)
|> Collage.Layout.stack
renderIngs: List Ing -> Collage.Collage msg
renderIngs ings =
let
render_ing ing =
let
paths = renderIngPaths ing
|> Collage.Layout.center
in
renderFrameAround "ing-" ing.name paths
in
ings
|> List.map render_ing
|> wrapH
|> Collage.Layout.center
renderSvcs2Pods: Pods -> Svcs -> Collage.Collage msg -> Collage.Collage msg
renderSvcs2Pods pods svcs collage =
let
get_points svc =
List.map (\l -> Collage.Layout.locate ("pod-" ++ l) Collage.Layout.top collage) (List.map .name (selected_pods svc))
get_start svc =
Collage.Layout.locate ("svc-" ++ svc.name) Collage.Layout.bottom collage
selected_pods svc =
filterPods (Maybe.withDefault Dict.empty svc.selectors) pods
render_svc2pods svc =
List.map (Collage.segment (Maybe.withDefault (0,0) (get_start svc))) (List.map (Maybe.withDefault (0,0)) (get_points svc))
|> List.map (Collage.traced (Collage.dot Collage.thick (Collage.uniform Color.yellow)))
|> Collage.Layout.stack
|> Collage.Layout.name ("svc2pods-" ++ svc.name)
in
svcs
|> List.map render_svc2pods
|> Collage.Layout.stack
renderIng2Svcs: List Ing -> Collage.Collage msg -> Collage.Collage msg
renderIng2Svcs ings collage =
let
render_ing2svcs ing =
let
san_name name =
String.Extra.replace "/" "" name
start path =
Collage.Layout.locate ("ing-path-" ++ san_name(path.path)) Collage.Layout.bottom collage
end path =
Collage.Layout.locate ("svc-" ++ path.backend) Collage.Layout.top collage
render_path2svc path =
Collage.segment (Maybe.withDefault (0,0) (start path)) (Maybe.withDefault (0,0) (end path))
|> Collage.traced (Collage.dot Collage.thick (Collage.uniform Color.yellow))
|> Collage.Layout.name ("ing2svcs-" ++ (san_name path.path))
in
ing.http_paths
|> List.foldr (++) []
|> List.map render_path2svc
|> Collage.Layout.stack
in
ings
|> List.map render_ing2svcs
|> Collage.Layout.stack
renderDeployment : List String -> Pods -> String -> Collage.Collage msg
renderDeployment replicasets pods name =
let
rs =
List.map (renderReplicaSet (filterNamePods name pods)) (filterNamePrefix name replicasets)
|> wrapH
in
renderFrameAround "dep-" name rs
greater : Float -> Float -> Float
greater a b =
if a > b then
a
else
b
wrapH : List (Collage.Collage msg) -> Collage.Collage msg
wrapH list =
let
space =
Collage.Layout.spacer pod_margin pod_margin
-- |> Collage.Layout.debug
in
[ space ]
++ (List.intersperse space list)
++ [ space ]
|> List.map (Collage.Layout.align Collage.Layout.top)
|> Collage.Layout.horizontal
|> wrapItem
|> List.map (Collage.Layout.align Collage.Layout.left)
|> Collage.Layout.vertical
|> Collage.Layout.center
wrapV : List (Collage.Collage msg) -> Collage.Collage msg
wrapV list =
let
space =
Collage.Layout.spacer pod_margin pod_margin
-- |> Collage.Layout.debug
in
[ space ]
++ (List.intersperse space list)
++ [ space ]
|> List.map (Collage.Layout.align Collage.Layout.top)
|> Collage.Layout.vertical
|> wrapItem
|> List.map (Collage.Layout.align Collage.Layout.left)
|> Collage.Layout.horizontal
|> Collage.Layout.center
wrap : List (Collage.Collage msg) -> List (Collage.Collage msg)
wrap list =
let
space =
Collage.Layout.spacer pod_margin pod_margin
-- |> Collage.Layout.debug
in
[ space ]
++ (List.intersperse space list)
++ [ space ]
wrapItem : Collage.Collage msg -> List (Collage.Collage msg)
wrapItem item =
let
space =
Collage.Layout.spacer pod_margin pod_margin
-- |> Collage.Layout.debug
in
[ space, item, space ]
renderReplicaSet : Pods -> String -> Collage.Collage msg
renderReplicaSet pods name =
let
podsc =
List.map renderPod (filterNamePods name pods)
|> wrap
|> Collage.Layout.horizontal
|> wrapItem
|> Collage.Layout.vertical
|> Collage.Layout.align Collage.Layout.base
rs =
Collage.rectangle (greater (Collage.Layout.width podsc) (Collage.Layout.width label)) (Collage.Layout.height podsc)
|> Collage.filled (Collage.transparent)
|> Collage.Layout.align Collage.Layout.base
|> Collage.Layout.name ("rs-" ++ name)
label =
Collage.Text.fromString name
|> Collage.rendered
|> Collage.shiftY ((Collage.Layout.height podsc) / 2 - (pod_margin / 2))
|> Collage.Layout.name ("label-rs-" ++ name)
in
[label, podsc, rs]
|> Collage.Layout.stack
-- |> Collage.Layout.debug
renderPod : Pod -> Collage.Collage msg
renderPod pod =
let
podc =
Collage.rectangle pod_width pod_width
|> Collage.filled (Collage.transparent)
|> Collage.Layout.name ("pod-" ++ pod.name)
get_status =
if (pod.deletionTimestamp == Nothing) then
"good"
else
"bad"
in
[podc]
|> Collage.group
|> Collage.Layout.name ("pod-" ++ pod.phase ++ "-" ++ get_status ++ "-" ++ pod.name)
-- |> Collage.Layout.debug
filterNamePrefix : String -> List String -> List String
filterNamePrefix prefix list =
list
|> List.filter (String.startsWith prefix)
filterNamePods : String -> Pods -> Pods
filterNamePods prefix list =
list
|> List.filter (\m -> String.startsWith prefix m.name )
-- SUBSCRIPTIONS
subscriptions : Model -> Sub Msg
subscriptions model =
Time.every Time.second Tick
-- HTTP
getPods : Cmd Msg
getPods =
Http.send NewPods (Http.get end_pods podDecoder)
getSvcs : Cmd Msg
getSvcs =
Http.send NewSvcs (Http.get end_svcs svcDecoder)
getIngs : Cmd Msg
getIngs =
Http.send NewIngs (Http.get end_ings ingDecoder)
getReplicaSets : Cmd Msg
getReplicaSets =
Http.send NewReplicaSets (Http.get end_replicasets itemsNameDecoder)
getDeployments : Cmd Msg
getDeployments =
Http.send NewDeployments (Http.get end_deployments itemsNameDecoder)
itemsNameDecoder : Decode.Decoder (List String)
itemsNameDecoder =
Decode.field "items" (Decode.list (Decode.at ["metadata","name"] Decode.string))
type alias PodLight =
{ name: String
, labels: Dict.Dict String String
, owner: String
}
podDecoder : Decode.Decoder (Pods)
podDecoder =
Decode.field "items"
(Decode.list
(Decode.map6 Pod
(Decode.at ["metadata", "name"] Decode.string)
(Decode.at ["metadata", "labels"] (Decode.dict Decode.string))
(Decode.at ["metadata", "ownerReferences"] (Decode.index 0 (Decode.field "name" Decode.string)))
(Decode.at ["status", "phase"] Decode.string)
(Decode.at ["status", "conditions"] (Decode.list (Decode.dict (Decode.oneOf [Decode.string, Decode.null ""]))))
(Decode.maybe (Decode.at ["metadata", "deletionTimestamp"] Decode.string))
)
)
svcDecoder : Decode.Decoder (Svcs)
svcDecoder =
Decode.field "items"
(Decode.list
(Decode.map2 Svc
(Decode.at ["metadata", "name"] Decode.string)
(Decode.maybe
(Decode.at ["spec", "selector"] (Decode.dict Decode.string))
)
)
)
ingDecoder : Decode.Decoder (List Ing)
ingDecoder =
Decode.field "items"
(Decode.list
(Decode.map2 Ing
(Decode.at ["metadata", "name"] Decode.string)
(Decode.at ["spec", "rules"]
(Decode.list
(Decode.at ["http", "paths"]
(Decode.list
(Decode.map2 IngPath
(Decode.field "path" Decode.string)
(Decode.at ["backend", "serviceName"] Decode.string)
)
)
)
)
)
)
)