{"id":997,"date":"2021-04-09T06:26:58","date_gmt":"2021-04-09T06:26:58","guid":{"rendered":"https:\/\/blog.ngocha.biz\/?p=997"},"modified":"2021-04-09T06:26:58","modified_gmt":"2021-04-09T06:26:58","slug":"kubernetes-v1-21-released","status":"publish","type":"post","link":"https:\/\/blog.ngocha.biz\/?p=997","title":{"rendered":"Kubernetes v1.21 Released: Here is What you should know"},"content":{"rendered":"

In this blog, we will look at the key changes in the Kubernetes v1.21 release.<\/p>\n

Here is a highlevel release changes.<\/p>\n

    \n
  1. Total 51 enhancements<\/li>\n
  2. 13 enhancements moved to stable<\/li>\n
  3. 16 enhancements moved to beta<\/li>\n
  4. 20 enhancements moved to alpha<\/li>\n
  5. 2 deprecated features<\/li>\n<\/ol>\n

    PodSecurityPolicy Deprecated<\/h2>\n

    As per the official Kubernetes blog<\/a> PSP (Pod Security Policy) is Deprecated in v1.21.<\/p>\n

    It doesn’t mean that it will be removed in v1.2. PSP feature will continue to exist till version 1.25 as per the current plan.<\/p>\n

    You can look into options like K-Rail<\/a>, Kyverno<\/a>, and OPA\/Gatekeeper<\/a> which has better user experience for implementing security policies.<\/p>\n

    PSP Replacement Policy<\/h2>\n

    Kubernetes Developer community is working on a feature which is now called the “PSP Replacement Policy” is expected to have an Alpha release in Kubernetes version 1.22.<\/p>\n

    Use cases covered by PodSecurityPolicy will be covered by the PSP Replacement Policy.<\/p>\n

    Here is the KEP<\/a> and also take a look at the Proposal document <\/a>to know more details<\/p>\n

    TopologyKeys Deprecated<\/h2>\n

    topologyKeys<\/code> alpha is deprecated. Topology-aware routing is implemented as topology-aware hints<\/a>. It is in the Alpha version.<\/p>\n

    \n
    You Might Like: Kubernetes Tutorials<\/a><\/div>\n<\/div>\n

    Other Changes<\/h2>\n

    Following are the minor changes in V1.21<\/p>\n

      \n
    1. CronJobs<\/a> Object is made Stable.<\/li>\n
    2. Immutable Secrets & Configmaps is made stable: If the immutable flag is enabled, it cannot be reverted.<\/li>\n
    3. IPv4\/IPv6 dual-stack support <\/a>is made beta.<\/li>\n
    4. Graceful node shutdown<\/a> is made beta. It is one of the required features in Kubernetes as many implementations use custom solutions to gracefully shut down the workloads during node termination.<\/li>\n
    5. Alpha release of PersistentVolume Health Monitor: You can monitor the health of PVs<\/li>\n<\/ol>\n

      Further Reading<\/h2>\n
        \n
      1. Kubernetes v1.21 release announcement<\/a><\/li>\n
      2. Cronjob GA<\/a><\/li>\n
      3. PSP – Past Present and Future<\/a><\/li>\n<\/ol>\n
        \n

        Ngu\u1ed3n:<\/strong> Kubernetes v1.21 Released: Here is What you should know \u2014 DevOpsCube<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

        Source: https:\/\/devopscube.com\/kubernetes-v1-21-released\/<\/p>\n","protected":false},"author":1,"featured_media":998,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-997","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-devops"],"_links":{"self":[{"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/posts\/997","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=997"}],"version-history":[{"count":0,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/posts\/997\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/media\/998"}],"wp:attachment":[{"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=997"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=997"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}