投稿時間:2022-08-11 18:24:54 RSSフィード2022-08-11 18:00 分まとめ(30件)

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python	Pythonタグが付けられた新着投稿 - Qiita	GoogleDrive のファイル操作（アップロード／ダウンロード）を自動化する	https://qiita.com/jun_knd_1300/items/b4c851211d768a0f1212	googlecloudprojec	2022-08-11 17:31:54
python	Pythonタグが付けられた新着投稿 - Qiita	【Selenium】headlessで実行した際に要素が見付かれないエラーについて	https://qiita.com/div_naoki/items/60561aa39b1178f43a2c	headless	2022-08-11 17:21:16
python	Pythonタグが付けられた新着投稿 - Qiita	[IronPython] PowerPointの図形描画をコンソールから自在に行う	https://qiita.com/Mt_SQ/items/9025d26b5709ca0648c6	ironpython	2022-08-11 17:19:12
python	Pythonタグが付けられた新着投稿 - Qiita	matplotlibのsubplotsのcolorbarを共有する	https://qiita.com/nabenabe0928/items/7bc9626c7410777b5625	colorbar	2022-08-11 17:15:48
Docker	dockerタグが付けられた新着投稿 - Qiita	【Docker】勉強したことをまとめる	https://qiita.com/monaka33/items/23826223cf5a730743e5	docker	2022-08-11 17:57:22
Ruby	Railsタグが付けられた新着投稿 - Qiita	いいね数が多い順番に並び替え	https://qiita.com/6heouP1HUKGRAJe/items/4306ad2866c1430f53a4	atendofdayfromtoday	2022-08-11 17:33:03
Ruby	Railsタグが付けられた新着投稿 - Qiita	カート機能についての理解	https://qiita.com/6heouP1HUKGRAJe/items/8ac0529a138681958458	成り立ち	2022-08-11 17:20:01
Ruby	Railsタグが付けられた新着投稿 - Qiita	rails sをしたら、PGSQL.5432エラーが出力された件	https://qiita.com/taramu/items/3ce9fab52527e99cf036	pgsql	2022-08-11 17:17:19
海外TECH	DEV Community	Just-in-time Worker Nodes with Karpenter	https://dev.to/makendrang/just-in-time-worker-nodes-with-karpenter-1711	Just in time Worker Nodes with KarpenterWith Kubernetes the ability to dynamically scale infrastructure based on demand is a major benefit It provides multiple layers of autoscaling functionality a horizontal pod autoscaler HPA and a vertical pod autoscaler VPA as a pod and a cluster autoscaler as a node However setting up cluster autoscaling with existing Kubernetes solutions can be difficult and restrictive For example in an AWS EKS cluster you cannot manage nodes directly Instead we need to use additional orchestration mechanisms such as node groups Suppose we have defined t large as instance type of nodegroup When a new node needs to be provisioned for the cluster Kubernetes Cluster Autoscaler creates a new instance of type t large regardless of resource requirements Although we can use mixed instances in node groups it is not always possible to meet resource demands and be cost effective Kubernetes AutoscalingKS Autoscaling helps us to scale horizontally or in our applications Pod based or HPA based scaling is a great first step However the problem is when we need multiple KS nodes to hold our PODs KarpenterKarpenter is a node based scaling solution created for KS and aims to improve efficiency and costs It s a great solution because we don t have to configure instance types or create node pools which drastically simplifies configuration On the other hand integration with Spot instances is painless and allows us to reduce our costs up to less than On Demand instances Karpenter is an open source node deployment project designed for Kubernetes Adding Karpenter to a Kubernetes cluster can significantly improve the efficiency and cost of running workloads on that cluster Features of KarpenterBeware of pods that the Kubernetes scheduler has marked as unschedulable Evaluate scheduling constraints resource requirements node selectors affinities tolerances and topology distribution constraints Demanded by pods deployment nodes that meet pod needs Schedule pods to run on new nodes Delete nodes when nodes are no longer needed Control Loops of KarpenterKarpenter has two control loops that maximize the availability and efficiency of your cluster AllocatorFast acting controller that ensures pods are scheduled as quickly as possible ReallocatorSlow acting controller replaces nodes as pod capacity changes over time Cluster AutoscalerCluster Autoscaler is a Kubernetes utility that increases or decreases the size of a Kubernetes cluster by adding or removing nodes based on the presence of pending pods and node utilization metrics Automatically resize the Kubernetes cluster when one of the following conditions is met There are pods that cannot run on the cluster due to insufficient resources There are nodes in the cluster that have been underused for a long period of time and their pods can be placed on other existing nodes A Kubernetes node autoscaling solution is a tool that automatically scales the Kubernetes cluster based on the demands of our workloads Therefore there is no need to manually create or delete a new Kubernetes node every time we need it Karpenter automatically provides new nodes in response to non programmable pods It does this by observing events within the Kubernetes cluster and then sending commands to the underlying cloud provider It is designed to work with any Kubernetes cluster in any environment Architecture of Cluster AutoscalerThe cluster autoscaler looks for pods that cannot be scheduled and nodes that are underutilized It then simulates adding or removing nodes before applying the change to your cluster The AWS cloud provider implementation in Cluster Autoscaler controls the DesiredReplicas field of your EC Auto Scaling groups The Kubernetes cluster autoscaler automatically adjusts the number of nodes in your cluster when pods fail or are rescheduled to other nodes The cluster autoscaler is typically installed as a deployment on your cluster Architecture of KarpenterKarpenter works with the Kubernetes scheduler observing incoming pods throughout the lifetime of the cluster It starts or stops nodes to optimize application availability and cluster utilization When there is enough capacity in the cluster the Kubernetes scheduler will place the incoming pods as usual When pods are started that cannot be scheduled using existing cluster capacity Karpenter bypasses the Kubernetes scheduler and works directly with your provider s compute service to start the minimum compute resources needed in those pods and associate pods with provisioning nodes When pods are removed Karpenter looks for opportunities to terminate underutilized nodes Karpenter claims to offer the following enhancements Designed to handle the full flexibility of the cloudKarpenter has the ability to efficiently address the full range of instance types available through AWS Cluster Autoscaler was not originally built with the flexibility to manage hundreds of instance types zones and purchasing options Node provisioning without groupsKarpenter manages each instance directly without using additional orchestration mechanisms such as node groups This allows you to retry in milliseconds instead of minutes when capacity is not available It also allows Karpenter to take advantage of different types of instances Availability Zones and purchasing options without creating hundreds of node groups Applying PlanningCluster Autoscaler does not associate pods with nodes it creates Instead it relies on the kube scheduler to make the same scheduling decision after the node is online The kubelet does not need to wait for the scheduler or the node to prepare It can immediately start preparing the container runtime environment including pre fetching the image This can reduce node startup latency by a few seconds In this tutorial you will learn how to Create EKS cluster for Karpenter Configure AWS Roles Install Karpenter Configure Karpenter Provisioner Karpenter node automatic resizing test RequirementsAWS CLIeksctlkubectlhelm Create EKS cluster for KarpenterBefore we continue we need to configure some environment variablesexport CLUSTER NAME YOUR CLUSTER NAMEexport AWS ACCOUNT ID YOUR ACCOUNT IDCreating a cluster with eksctl is the easiest way to do this on AWS First we need to create a yaml file For example test demo yamlcat lt lt EOF gt test demo yaml apiVersion eksctl io valphakind ClusterConfigmetadata name CLUSTER NAME region us east version tags karpenter sh discovery CLUSTER NAME managedNodeGroups instanceType t medium amiFamily AmazonLinux name CLUSTER NAME ng desiredCapacity minSize maxSize iam withOIDC trueEOFCreate the cluster using the generated fileeksctl create cluster f test demo yaml Configure AWS RolesTo use Karpenter on AWS we need to configure permissions KarpenterNode IAM roleInstance profile with permissions to run containers and configure networks Creating the KarpenterNode IAM RoleYou need to create the IAM resources using AWS CloudFormation We need to download the cloud formation stack from the karpenter site and deploy it with our cluster name information curl fsSL gt cloudformation tmp ec user ip aws cloudformation deploy stack name CLUSTER NAME template file cloudformation tmp capabilities CAPABILITY NAMED IAM parameter overrides ClusterName CLUSTER NAME Waiting for changeset to be created Waiting for stack create update to completeSuccessfully created updated stack makendranYou need to grant access to the instances by using the profile to connect to the cluster This command adds the Karpenter node role to the aws auth configuration directory so that nodes with this role can connect to the cluster ec user ip eksctl create iamidentitymapping username system node ECPrivateDNSName cluster CLUSTER NAME arn arn aws iam AWS ACCOUNT ID role KarpenterNodeRole CLUSTER NAME group system bootstrappers group system nodes adding identity arn aws iam role KarpenterNodeRole makendran to auth ConfigMapKarpenter can now launch new EC instances and those instances can connect to your cluster KarpenterController IAM roleAuthorization to launch instances Create IAM KarpenterController roleCreate AWS IAM role and Kubernetes service account and associate them via IAM roles for the service accounts ec user ip eksctl create iamserviceaccount cluster CLUSTER NAME name karpenter namespace karpenter attach policy arn arn aws iam AWS ACCOUNT ID policy KarpenterControllerPolicy CLUSTER NAME approve existing iamserviceaccount s kube system aws node will be excluded iamserviceaccount karpenter karpenter was included based on the include exclude rules serviceaccounts that exist in Kubernetes will be excluded use override existing serviceaccounts to override task sequential sub tasks create IAM role for serviceaccount karpenter karpenter create serviceaccount karpenter karpenter building iamserviceaccount stack eksctl makendran addon iamserviceaccount karpenter karpenter deploying stack eksctl makendran addon iamserviceaccount karpenter karpenter waiting for CloudFormation stack eksctl makendran addon iamserviceaccount karpenter karpenter waiting for CloudFormation stack eksctl makendran addon iamserviceaccount karpenter karpenter created namespace karpenter created serviceaccount karpenter karpenter Role associated with EC Spot serviceTo run EC Spot in our account EC Spot instance is an unused EC instance available for less than the price on request Create the role associated with the EC Spot serviceThis step is only required if this is your first time using EC Spot in this account ec user ip aws iam create service linked role aws service name spot amazonaws com Role Path aws service role spot amazonaws com RoleName AWSServiceRoleForECSpot RoleId AROATDHGFJRNLIPO Arn arn aws iam role aws service role spot amazonaws com AWSServiceRoleForECSpot CreateDate T AssumeRolePolicyDocument Version Statement Action sts AssumeRole Effect Allow Principal Service spot amazonaws com Install KarpenterWe can use Helm to install Karpenter helm repo add karpenter helm repo updatehelm upgrade install karpenter karpenter karpenter namespace karpenter create namespace set serviceAccount create false version v set controller clusterName CLUSTER NAME set controller clusterEndpoint aws eks describe cluster name CLUSTER NAME query cluster endpoint output json wait for the defaulting webhook to install before creating a ProvisionerCheck out Karpenter s resources on KS ec user ip kubectl get all n karpenterNAME READY STATUS RESTARTS AGEpod karpenter controller dfb sntgb Running mspod karpenter webhook fdbd tcd Running msNAME TYPE CLUSTER IP EXTERNAL IP PORT S AGEservice karpenter metrics ClusterIP lt none gt TCP msservice karpenter webhook ClusterIP lt none gt TCP msNAME READY UP TO DATE AVAILABLE AGEdeployment apps karpenter controller msdeployment apps karpenter webhook msNAME DESIRED CURRENT READY AGEreplicaset apps karpenter controller ddf msreplicaset apps karpenter controller dfb msreplicaset apps karpenter webhook fdbd msreplicaset apps karpenter webhook ddd ms Configure Karpenter provisionerA Karpenter framework is to manage various provisioning decisions based on pod attributes such as labels and affinities cat lt lt EOF gt provisioner yaml apiVersion karpenter sh valphakind Provisionermetadata name defaultspec requirements key karpenter sh capacity type operator In values spot limits resources cpu provider subnetSelector karpenter sh discovery CLUSTER NAME securityGroupSelector karpenter sh discovery CLUSTER NAME instanceProfile KarpenterNodeInstanceProfile CLUSTER NAME ttlSecondsAfterEmpty EOFkubectl apply f provisioner yamlKarpenter is ready to start provisioning nodes Karpenter Node Autoscaling TestThis implementation uses the pause image and starts with zero replicas cat lt lt EOF gt deployment yaml apiVersion apps vkind Deploymentmetadata name inflatespec replicas selector matchLabels app inflate template metadata labels app inflate spec terminationGracePeriodSeconds containers name inflate image public ecr aws eks distro kubernetes pause resources requests cpu EOFkubectl apply f deployment yamlNow we can scale the distribution to replicaskubectl scale deployment inflate replicas Now we can check Karpenter s logs kubectl logs f n karpenter k get pods n karpenter l karpenter controller o name T Z INFO controller provisioning Launched instance i deaeebc hostname ip ec internal type txlarge zone us east c capacityType spot commit bb provisioner default T Z INFO controller provisioning Bound pod s to node ip ec internal commit bb provisioner default T Z INFO controller provisioning Waiting for unschedulable pods commit bb provisioner default Karpenter created a new instance Instance i deaeebcHost name ip ec internalType txlargeZone us east cWe can check the nodes ec user ip kubectl get nodesNAME STATUS ROLES AGE VERSIONip ec internal Ready lt none gt ms v eks cfip ec internal Ready lt none gt m v eks cfWe now have a new worker node The node is an EC Spot instance We can check the SpotPrice ec user ip aws ec describe spot instance requests grep InstanceType InstanceId SpotPrice InstanceId i deaeebc InstanceType txlarge SpotPrice Finally we can resize the distribution to to check if the node has been removedkubectl scale deployment inflate replicas Karpenter cordoned the node and then removed it kubectl logs f n karpenter kubectl get pods n karpenter l karpenter controller o name T Z INFO controller provisioning Waiting for unschedulable pods commit bb provisioner default T Z INFO controller node Added TTL to empty node commit bb node ip ec internal T Z INFO controller node Triggering termination after s for empty node commit bb node ip ec internal T Z INFO controller termination Cordoned node commit bb node ip ec internal T Z INFO controller termination Deleted node commit bb node ip ec internal Check the nodes again The second node has been removed ec user ip kubectl get nodesNAME STATUS ROLES AGE VERSIONip ec internal Ready lt none gt m v eks cf CleanupTo avoid additional costs remove the demo infrastructure from your AWS account helm uninstall karpenter namespace karpentereksctl delete iamserviceaccount cluster CLUSTER NAME name karpenter namespace karpenteraws cloudformation delete stack stack name Karpenter CLUSTER NAME aws ec describe launch templates jq r LaunchTemplates LaunchTemplateName grep i Karpenter CLUSTER NAME xargs I aws ec delete launch template launch template name eksctl delete cluster name CLUSTER NAME ConclusionKarpenter is a great tool for configuring the autoscaling of Kubernetes nodes it s pretty new However it has integration with Spot Fargate serverless instances and other great features The best part is that you don t need to configure the node pools or choose the size of the instances it s also very fast it takes about minute to deploy the pods to the new node Gratitude for perusing my article till end I hope you realized something unique today If you enjoyed this article then please share to your buddies and if you have suggestions or thoughts to share with me then please write in the comment box Follow me and share your thoughts GitHubLinkedInTwitter	2022-08-11 08:00:33
海外科学	BBC News - Science & Environment	Is the UK heading for a drought and will there be more hosepipe bans?	https://www.bbc.co.uk/news/science-environment-62298430?at_medium=RSS&at_campaign=KARANGA	multiple	2022-08-11 08:01:16
海外ニュース	Japan Times latest articles	Unification Church ties likely to weigh on Cabinet despite Kishida’s bid for stability	https://www.japantimes.co.jp/news/2022/08/11/national/politics-diplomacy/new-cabinet-kishida-church-scandal/	Unification Church ties likely to weigh on Cabinet despite Kishida s bid for stabilityThe changes to the Cabinet lineup may do little for the Kishida administration s falling popularity ratings and could impact its efforts to deal with primary	2022-08-11 17:45:05
海外ニュース	Japan Times latest articles	Health panel issues warning over COVID-19 in Japan	https://www.japantimes.co.jp/news/2022/08/11/national/science-health/covid-panel-warning/	heavy	2022-08-11 17:06:40
海外ニュース	Japan Times latest articles	Nick Kyrgios not surprised by win over No. 1 Daniil Medvedev	https://www.japantimes.co.jp/sports/2022/08/11/tennis/kyrgios-medvedev-canada/	medvedev	2022-08-11 17:27:59
海外ニュース	Japan Times latest articles	Germany looks like it is ready to begin a fourth nuclear exit	https://www.japantimes.co.jp/opinion/2022/08/11/commentary/world-commentary/germany-nuclear-power-problem/	germany	2022-08-11 17:38:17
海外ニュース	Japan Times latest articles	What led to the key appointments in Kishida’s new ‘unity Cabinet’	https://www.japantimes.co.jp/opinion/2022/08/11/commentary/japan-commentary/cabinet-reshuffle-objectives/	implications	2022-08-11 17:25:18
ニュース	BBC News - Home	UK heatwave: Four-day extreme heat warning comes into effect	https://www.bbc.co.uk/news/uk-62499044?at_medium=RSS&at_campaign=KARANGA	disrupt	2022-08-11 08:24:31
ニュース	BBC News - Home	Man killed during string of attacks around Skye is named	https://www.bbc.co.uk/news/uk-scotland-highlands-islands-62503691?at_medium=RSS&at_campaign=KARANGA	nameda	2022-08-11 08:27:40
ニュース	BBC News - Home	Ramsgate: Car crashes into family, killing man and woman	https://www.bbc.co.uk/news/uk-england-kent-62502355?at_medium=RSS&at_campaign=KARANGA	injuries	2022-08-11 08:05:38
ニュース	BBC News - Home	Why have so many children's homes opened in Blackpool?	https://www.bbc.co.uk/news/uk-62479564?at_medium=RSS&at_campaign=KARANGA	blackpool	2022-08-11 08:09:15
ニュース	BBC News - Home	Is the UK heading for a drought and will there be more hosepipe bans?	https://www.bbc.co.uk/news/science-environment-62298430?at_medium=RSS&at_campaign=KARANGA	multiple	2022-08-11 08:01:16
北海道	北海道新聞	バスケ日本女子、ラトビアに快勝　強化試合、８３―５４	https://www.hokkaido-np.co.jp/article/716804/	強化試合	2022-08-11 17:40:00
北海道	北海道新聞	東京で３万１２４７人感染　３０代が最多、死亡は２２人	https://www.hokkaido-np.co.jp/article/716803/	新型コロナウイルス	2022-08-11 17:38:00
北海道	北海道新聞	日３―２西（１１日）　日本ハムの清水がサヨナラ打	https://www.hokkaido-np.co.jp/article/716802/	日本ハム	2022-08-11 17:29:00
北海道	北海道新聞	オ６―１楽（１１日）　オリックスが３位浮上	https://www.hokkaido-np.co.jp/article/716801/	頓宮	2022-08-11 17:26:00
北海道	北海道新聞	徳島で阿波おどり前夜祭　新型コロナ対策講じ開幕へ	https://www.hokkaido-np.co.jp/article/716800/	夏の風物詩	2022-08-11 17:26:00
北海道	北海道新聞	中国の新車販売台数３０％増　回復基調続き、７月では最高	https://www.hokkaido-np.co.jp/article/716799/	新車販売台数	2022-08-11 17:26:00
北海道	北海道新聞	北海道内７６６０人感染　１０日に次ぎ過去２番目　死者１０人　新型コロナ	https://www.hokkaido-np.co.jp/article/716773/	北海道内	2022-08-11 17:25:19
北海道	北海道新聞	夏巡業、高安は逸ノ城初Ｖに刺激　若隆景らも気合	https://www.hokkaido-np.co.jp/article/716796/	茨城県古河市	2022-08-11 17:15:00
北海道	北海道新聞	道南６０６人感染　新型コロナ	https://www.hokkaido-np.co.jp/article/716793/	道南	2022-08-11 17:13:00
IT	週刊アスキー	富士そばで「冷し味玉そば」＋「ミニカレー」550円　8月末までのお得なセット	https://weekly.ascii.jp/elem/000/004/101/4101567/	富士そば	2022-08-11 17:30:00