{"id":394,"date":"2018-10-16T19:35:51","date_gmt":"2018-10-16T19:35:51","guid":{"rendered":"https:\/\/www.appservgrid.com\/paw93\/?p=394"},"modified":"2018-10-17T09:13:52","modified_gmt":"2018-10-17T09:13:52","slug":"roundup-jetstackhqs-tuesday-twitter-tips-for-kubernetes","status":"publish","type":"post","link":"https:\/\/www.appservgrid.com\/paw93\/index.php\/2018\/10\/16\/roundup-jetstackhqs-tuesday-twitter-tips-for-kubernetes\/","title":{"rendered":"Roundup – @JetstackHQ’s Tuesday Twitter Tips for Kubernetes \/"},"content":{"rendered":"

By Matt Bates<\/a><\/p>\n

Last year we were successful with a series of Kubernetes tips shared via Twitter <\/a>: it was called Tuesday Tips. Following a bit of a hiatus,
\nwe\u2019d like to bring it back. We\u2019re starting with a roundup of our previous tips (those that are still valid anyway!)<\/p>\n

This blog post compiles a summary of them, and ranks them according to popularity. Looking back it\u2019s amazing how much the project has changed, so we\u2019re exploring new features and running another series.<\/p>\n

First time around the top tip was:<\/p>\n

#1 Software engineers love shell auto-completion because it saves time and keystrokes – this tweet shows how to enable it for the kubectl command.<\/h3>\n

Add kubectl shell auto-completion for bash\/zsh in 1.3+ by sourcing kubectl completion . #tuesdaytip<\/a> #k8s<\/a> https:\/\/t.co\/bb5s6J9NZN<\/a><\/p>\n

\u2014 Jetstack (@JetstackHQ) July 26, 2016<\/a><\/p><\/blockquote>\n

#2 You don\u2019t have to do anything special to get your service distributed across nodes.<\/h3>\n

Create a service prior to a RC\/RS and pods will spread across nodes. The default scheduler has service anti-affinity. #tuesdaytip<\/a><\/p>\n

\u2014 Jetstack (@JetstackHQ) June 21, 2016<\/a><\/p><\/blockquote>\n

#3 We showed you a new and easy way to spin up a Job.<\/h3>\n

Use kubectl run with \u2018–restart=Never\u2019 and it\u2019ll spin up a Job (vs Deployment+RS with default restart policy of Always) #tuesdaytip<\/a><\/p>\n

\u2014 Jetstack (@JetstackHQ) June 7, 2016<\/a><\/p><\/blockquote>\n

#4 You need to be able to access certain types of pod using a predictable network identity – you can declare the DNS entry using PodSpec. This was a two-part tip – we gave you the annotations to achieve this in the previous version too.<\/h3>\n

As of #k8s<\/a> v1.3, you can modify a pod’s hostname and subdomain via new field in the PodSpec: https:\/\/t.co\/Gw8br7Y1Dg<\/a> #tuesdaytip<\/a><\/p>\n

\u2014 Jetstack (@JetstackHQ) July 12, 2016<\/a><\/p><\/blockquote>\n

To achieve the same behaviour in 1.2 you can use the https:\/\/t.co\/TbFWey17Ha<\/a> + https:\/\/t.co\/V1zOJ2SA4S<\/a> annotations #tuesdaytip<\/a><\/p>\n

\u2014 Jetstack (@JetstackHQ) July 12, 2016<\/a><\/p><\/blockquote>\n

#5 A bash one-liner for copying resources from one namespace to another. This deserved to place higher.<\/h3>\n

Use kubectl\u2019s standard streams to easily copy resources across namespaces #K8s<\/a> #TuesdayTip<\/a> https:\/\/t.co\/zDZCPUjkeG<\/a> pic.twitter.com\/kKr3VRN4t2<\/a><\/p>\n

\u2014 Jetstack (@JetstackHQ) August 2, 2016<\/a><\/p><\/blockquote>\n

#6 DaemonSets run on all nodes – even those where scheduling is disabled for maintenance.<\/h3>\n

Nodes that are marked with \u201cSchedulingDisabled\u201d will still run pods from DaemonSets #TuesdayTip<\/a> #Kubernetes<\/a><\/p>\n

\u2014 Jetstack (@JetstackHQ) August 9, 2016<\/a><\/p><\/blockquote>\n

#7 Add a record of what has been done to your resource annotation.<\/h3>\n

kubectl has a –record flag to store create\/update commands as a resource annotation, useful for introspection #tuesdaytip<\/a> #kubernetes<\/a><\/p>\n

\u2014 Jetstack (@JetstackHQ) August 23, 2016<\/a><\/p><\/blockquote>\n

#8 This is an important one – use kubectl drain to decommission nodes prior to maintenance (but see #6!).<\/h3>\n

Use kubectl drain to decommission a #k8s<\/a> node prior to upgrade\/maintenance; cordons the node (unschedulable) + deletes all pods #tuesdaytip<\/a><\/p>\n

\u2014 Jetstack (@JetstackHQ) June 14, 2016<\/a><\/p><\/blockquote>\n

#9 A guest tweet and a valuable one.<\/h3>\n

This week’s #Kubernetes<\/a> #TuesdayTip<\/a>, courtesy of @asynchio<\/a>!! https:\/\/t.co\/jwnGItvf74<\/a><\/p>\n

\u2014 Jetstack (@JetstackHQ) August 16, 2016<\/a><\/p><\/blockquote>\n

#10 Last, but certainly not least, as it\u2019s still really useful for keeping track of your infrastructure.<\/h3>\n

Add your own custom labels to nodes using kubelet param –node-labels= Eg use a node-label for role (master\/worker) #tuesdaytip<\/a> #kubernetes<\/a><\/p>\n

\u2014 Jetstack (@JetstackHQ) July 5, 2016<\/a><\/p><\/blockquote>\n

Source<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

By Matt Bates Last year we were successful with a series of Kubernetes tips shared via Twitter : it was called Tuesday Tips. Following a bit of a hiatus, we\u2019d like to bring it back. We\u2019re starting with a roundup of our previous tips (those that are still valid anyway!) This blog post compiles a … <\/p>\n

Continue reading “Roundup – @JetstackHQ’s Tuesday Twitter Tips for Kubernetes \/”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-394","post","type-post","status-publish","format-standard","hentry","category-kubernetes"],"_links":{"self":[{"href":"https:\/\/www.appservgrid.com\/paw93\/index.php\/wp-json\/wp\/v2\/posts\/394","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appservgrid.com\/paw93\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appservgrid.com\/paw93\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appservgrid.com\/paw93\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appservgrid.com\/paw93\/index.php\/wp-json\/wp\/v2\/comments?post=394"}],"version-history":[{"count":1,"href":"https:\/\/www.appservgrid.com\/paw93\/index.php\/wp-json\/wp\/v2\/posts\/394\/revisions"}],"predecessor-version":[{"id":540,"href":"https:\/\/www.appservgrid.com\/paw93\/index.php\/wp-json\/wp\/v2\/posts\/394\/revisions\/540"}],"wp:attachment":[{"href":"https:\/\/www.appservgrid.com\/paw93\/index.php\/wp-json\/wp\/v2\/media?parent=394"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appservgrid.com\/paw93\/index.php\/wp-json\/wp\/v2\/categories?post=394"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appservgrid.com\/paw93\/index.php\/wp-json\/wp\/v2\/tags?post=394"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}