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#94 indicate outdated cluster data by pulsating

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This commit is contained in:
Henning Jacobs
2017-01-15 22:14:53 +01:00
parent 17d9c1e1a2
commit 08dff18928
5 changed files with 99 additions and 7 deletions
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53
app/src/app.js
View File

@@ -25,7 +25,10 @@ export default class App {
this.keepAliveSeconds = 20
// always reconnect after 5 minutes
this.maxConnectionLifetimeSeconds = 300
// consider cluster data older than 1 minute outdated
this.maxDataAgeSeconds = 60
this.clusters = new Map()
this.clusterStatuses = new Map()
}
parseLocationHash() {
@@ -122,6 +125,8 @@ export default class App {
addEventListener(
'keydown', downHandler.bind(this), false
)
setInterval(this.pruneUnavailableClusters.bind(this), 5 * 1000)
}
draw() {
@@ -313,12 +318,14 @@ export default class App {
for (const cluster of clusters) {
if (!this.selectedClusters.size || this.selectedClusters.has(cluster.id)) {
clusterIds.add(cluster.id)
const status = this.clusterStatuses.get(cluster.id)
let clusterBox = clusterComponentById[cluster.id]
if (!clusterBox) {
clusterBox = new Cluster(cluster, this.tooltip)
clusterBox = new Cluster(cluster, status, this.tooltip)
this.viewContainer.addChild(clusterBox)
} else {
clusterBox.cluster = cluster
clusterBox.status = status
}
clusterBox.draw()
clusterBox.x = 0
@@ -391,6 +398,23 @@ export default class App {
}
}
pruneUnavailableClusters() {
let updateNeeded = false
const nowSeconds = Date.now() / 1000
for (const [clusterId, statusObj] of this.clusterStatuses.entries()) {
const lastQueryTime = statusObj.last_query_time || 0
if (lastQueryTime < nowSeconds - this.maxDataAgeSeconds) {
this.clusters.delete(clusterId)
updateNeeded = true
} else if (lastQueryTime < nowSeconds - 20) {
updateNeeded = true
}
}
if (updateNeeded) {
this.update()
}
}
disconnect() {
if (this.eventSource != null) {
this.eventSource.close()
@@ -399,6 +423,15 @@ export default class App {
}
}
refreshLastQueryTime(clusterId) {
let statusObj = this.clusterStatuses.get(clusterId)
if (!statusObj) {
statusObj = {}
}
statusObj.last_query_time = Date.now() / 1000
this.clusterStatuses.set(clusterId, statusObj)
}
connect() {
// first close the old connection
this.disconnect()
@@ -425,13 +458,21 @@ export default class App {
that._errors = 0
that.keepAlive()
const cluster = JSON.parse(event.data)
that.clusters.set(cluster.id, cluster)
that.update()
const status = that.clusterStatuses.get(cluster.id)
const nowSeconds = Date.now() / 1000
if (status && status.last_query_time < nowSeconds - that.maxDataAgeSeconds) {
// outdated data => ignore
} else {
that.clusters.set(cluster.id, cluster)
that.update()
}
})
eventSource.addEventListener('clusterdelta', function(event) {
that._errors = 0
that.keepAlive()
const data = JSON.parse(event.data)
// we received some delta => we know that the cluster query succeeded!
that.refreshLastQueryTime(data.cluster_id)
let cluster = that.clusters.get(data.cluster_id)
if (cluster && data.delta) {
// deep copy cluster object (patch function mutates inplace!)
@@ -441,6 +482,12 @@ export default class App {
that.update()
}
})
eventSource.addEventListener('clusterstatus', function(event) {
that._errors = 0
that.keepAlive()
const data = JSON.parse(event.data)
that.clusterStatuses.set(data.cluster_id, data.status)
})
this.connectTime = Date.now()
}

37
app/src/cluster.js
View File

@@ -4,12 +4,25 @@ import App from './app.js'
const PIXI = require('pixi.js')
export default class Cluster extends PIXI.Graphics {
constructor (cluster, tooltip) {
constructor (cluster, status, tooltip) {
super()
this.cluster = cluster
this.status = status
this.tooltip = tooltip
}
destroy() {
if (this.tick) {
PIXI.ticker.shared.remove(this.tick, this)
}
super.destroy()
}
pulsate(_time) {
const v = Math.sin((PIXI.ticker.shared.lastTime % 1000) / 1000. * Math.PI)
this.alpha = 0.4 + (v * 0.6)
}
draw () {
this.removeChildren()
this.clear()
@@ -80,7 +93,7 @@ export default class Cluster extends PIXI.Graphics {
const width = Math.max(masterWidth, workerWidth)
this.drawRect(0, 0, width, top + masterHeight + workerHeight)
var topHandle = new PIXI.Graphics()
const topHandle = this.topHandle = new PIXI.Graphics()
topHandle.beginFill(App.current.theme.primaryColor, 1)
topHandle.drawRect(0, 0, width, 15)
topHandle.endFill()
@@ -90,11 +103,29 @@ export default class Cluster extends PIXI.Graphics {
topHandle.on('click', function(_event) {
App.current.toggleCluster(that.cluster.id)
})
var text = new PIXI.Text(this.cluster.api_server_url, {fontFamily: 'ShareTechMono', fontSize: 10, fill: 0x000000})
const text = new PIXI.Text(this.cluster.api_server_url, {fontFamily: 'ShareTechMono', fontSize: 10, fill: 0x000000})
text.x = 2
text.y = 2
topHandle.addChild(text)
this.addChild(topHandle)
let newTick = null
const nowSeconds = Date.now() / 1000
if (this.status && this.status.last_query_time < nowSeconds - 20) {
newTick = this.pulsate
}
if (newTick && newTick != this.tick) {
this.tick = newTick
// important: only register new listener if it does not exist yet!
// (otherwise we leak listeners)
PIXI.ticker.shared.add(this.tick, this)
} else if (!newTick && this.tick) {
PIXI.ticker.shared.remove(this.tick, this)
this.tick = null
this.alpha = 1
this.tint = 0xffffff
}
}
}

7
kube_ops_view/kubernetes.py
View File

@@ -110,4 +110,9 @@ def query_kubernetes_cluster(cluster):
container['resources']['usage'] = container_metrics['usage']
except Exception as e:
logger.warning('Failed to query pod metrics for cluster {}: {}'.format(cluster.id, get_short_error_message(e)))
return {'id': cluster_id, 'api_server_url': api_server_url, 'nodes': nodes, 'unassigned_pods': unassigned_pods}
return {
'id': cluster_id,
'api_server_url': api_server_url,
'nodes': nodes,
'unassigned_pods': unassigned_pods
}

6
kube_ops_view/main.py
View File

@@ -88,9 +88,15 @@ def event(cluster_ids: set):
# first sent full data once
for cluster_id in app.store.get_cluster_ids():
if not cluster_ids or cluster_id in cluster_ids:
status = app.store.get_cluster_status(cluster_id)
if status:
# send the cluster status including last_query_time BEFORE the cluster data
# so the UI knows how to render correctly from the start
yield 'event: clusterstatus\ndata: ' + json.dumps({'cluster_id': cluster_id, 'status': status}, separators=(',', ':')) + '\n\n'
cluster = app.store.get_cluster_data(cluster_id)
if cluster:
yield 'event: clusterupdate\ndata: ' + json.dumps(cluster, separators=(',', ':')) + '\n\n'
while True:
for event_type, event_data in app.store.listen():
# hacky, event_data can be delta or full cluster object

3
kube_ops_view/update.py
View File

@@ -55,6 +55,7 @@ def update_clusters(cluster_discoverer, query_cluster: callable, store, query_in
except Exception as e:
backoff = handle_query_failure(e, cluster, backoff)
status['backoff'] = backoff
store.publish('clusterstatus', {'cluster_id': cluster.id, 'status': status})
else:
status['last_query_time'] = now
if backoff:
@@ -70,6 +71,8 @@ def update_clusters(cluster_discoverer, query_cluster: callable, store, query_in
store.set_cluster_data(cluster.id, data)
else:
logger.info('Discovered new cluster {} ({}).'.format(cluster.id, cluster.api_server_url))
# first send status with last_query_time!
store.publish('clusterstatus', {'cluster_id': cluster.id, 'status': status})
store.publish('clusterupdate', data)
store.set_cluster_data(cluster.id, data)
store.set_cluster_status(cluster.id, status)