{"id":6780,"date":"2021-07-30T16:09:12","date_gmt":"2021-07-30T23:09:12","guid":{"rendered":"https:\/\/blogs.infoblox.com\/?p=6780"},"modified":"2021-08-02T09:03:54","modified_gmt":"2021-08-02T16:03:54","slug":"devops-containers-networking-and-kubernetes","status":"publish","type":"post","link":"https:\/\/www.infoblox.com\/blog\/community\/devops-containers-networking-and-kubernetes\/","title":{"rendered":"DevOps Containers, Networking and Kubernetes"},"content":{"rendered":"<p>One notable outcome of the Covid-19 pandemic is the impact of digital transformation and network migration to cloud-native architectures.\u00a0 By 2022, Gartner predicts more than 75% of global organizations will be running containerized applications in production, a substantial increase from less than 30% today. Michael Warrilow, research vice-president at Gartner, says, \u201cUnderstanding of \u2018cloud-native\u2019 varies, but it has significant potential benefits over traditional, monolithic application design, such as scalability, elasticity and agility. It is also strongly associated with the use of containers.\u201d (Source: <a href=\"https:\/\/www.computerweekly.com\/feature\/Containers-for-a-post-pandemic-IT-architecture\">https:\/\/www.computerweekly.com\/feature\/Containers-for-a-post-pandemic-IT-architecture<\/a>)<\/p>\n<p>The analyst\u2019s figures are reflected in the latest Red Hat Enterprise Open-Source Report (2021), which shows container adoption is already widespread. Of the 1,250 IT leaders surveyed, just under 50% said they use containers in production to at least some degree. A further 37% use containers for development only, while only 16% are still evaluating or researching container adoption, according to Red Hat.<\/p>\n<p>\u201cContainers are not a nascent trend any longer,\u201d says Red Hat technology evangelist Gordon Haff. \u201cIn this past year, we have seen a lot of companies go to containers.\u201d So, what exactly are some of the key factors to consider with containers and networking?<\/p>\n<h3><strong>Container Networking Considerations<\/strong><strong>\u00a0<\/strong><\/h3>\n<ul>\n<li>\n<h4><strong>Complexity<\/strong><\/h4>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\">Running multiple container environments (e.g., on-premises, and in private, public and hybrid cloud environments) adds complexity, making it more difficult to manage. Running containers in production can be a massive effort. For example, a single application can have 1000s of containers and there can be many such applications all running in production. Apps deployed in multiple environments generate substantially more IPs to manage than in traditional deployments.<\/p>\n<ul>\n<li>\n<h4><strong>Dynamic Scalability<\/strong><\/h4>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\">Unlike traditional IP networking, container-based networking is dynamic and highly scalable. Nothing is static. Configurations are constantly spinning up and down which creates some interesting operational challenges.<strong>\u00a0<\/strong><\/p>\n<ul>\n<li>\n<h4><strong>Microservices Communications<\/strong><\/h4>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\">Another key challenge with containerized networking is communication between the various microservices running on them. For example, containers need to communicate with other containers, some of which are internal only while others are external, and so on.<\/p>\n<ul>\n<li>\n<h4><strong>Multiple Environments<\/strong><\/h4>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\">Many organizations deploy container environments on-premises and across multiple cloud providers, and each of these providers define their own networking policies. This requires additional consideration to successfully navigate disparate environments.<\/p>\n<ul>\n<li>\n<h4><strong>Security<\/strong><\/h4>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\">Statically allocated IPs and ports won\u2019t work in a container environment, which makes network security more involved. There are also increased runtime security risks such as crypto currency mining that creates additional security exposure.<strong>\u00a0<\/strong><\/p>\n<ul>\n<li>\n<h4><strong>Visibility and Monitoring Challenges<\/strong><\/h4>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\">With multi-platforms running multi-apps and a myriad of IPs, there are bound to be visibility and monitoring challenges. It is extremely difficult to have a clear picture of all the apps, associated containers, and keep track of container health.<\/p>\n<h3><strong>Kubernetes \u2013 Is it the Complete Solution?<\/strong><\/h3>\n<p>Kubernetes can solve many of the networking issues that come with containers, but does it really address all the challenges? If not, where does it fall short?<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-6784\" src=\"https:\/\/blogs.infoblox.com\/wp-content\/uploads\/DevOps-2.png\" alt=\"\" width=\"1174\" height=\"418\" srcset=\"https:\/\/www.infoblox.com\/blog\/wp-content\/uploads\/DevOps-2.png 1174w, https:\/\/www.infoblox.com\/blog\/wp-content\/uploads\/DevOps-2-300x107.png 300w, https:\/\/www.infoblox.com\/blog\/wp-content\/uploads\/DevOps-2-1024x365.png 1024w, https:\/\/www.infoblox.com\/blog\/wp-content\/uploads\/DevOps-2-768x273.png 768w\" sizes=\"auto, (max-width: 1174px) 100vw, 1174px\" \/><\/p>\n<p style=\"text-align: center;\">Traditional, Virtualized and Container Deployment Models<\/p>\n<p style=\"text-align: center;\"><em>(Source: <\/em><a href=\"https:\/\/kubernetes.io\/docs\/concepts\/overview\/what-is-kubernetes\/\"><em>Kubernetes<\/em><\/a><em>)<\/em><\/p>\n<p>In general, Kubernetes simplifies container networking. Containers are grouped into pods, each with a shared namespace. All containers in a pod have the same port, IP address and port space. Containers within a pod can use localhost to communicate with each other since they all operate in the same namespace. You can also configure pod-to-pod, pod-to-service and internet-to-service communications. Kubernetes presents several key advantages:<\/p>\n<ul>\n<li>\n<h4><strong>Easier Deployment Automation and Management<\/strong><\/h4>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\">Kubernetes allows you to manage and automate deployments and container workloads\/operations on-prem or in the cloud.<\/p>\n<ul>\n<li>\n<h4><strong>High Availability<\/strong><\/h4>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\">Kubernetes enables traffic routing to containers and load balancing support to distribute traffic across pods.<\/p>\n<ul>\n<li>\n<h4><strong>Scalability<\/strong><\/h4>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\">Kubernetes allows you to manage and automate deployments and container workloads\/operations on-prem or in the cloud.<\/p>\n<ul>\n<li>\n<h4><strong>Visibility<\/strong><\/h4>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\">Kubernetes provides cluster and pod monitoring methods.<\/p>\n<h3><strong>What Limits Exist with Kubernetes?<\/strong><\/h3>\n<p>While all of this sounds great, there are limits. Managing Kubernetes across multiple environments (e.g., multi-clouds, multiple continuous integration, delivery and deployment (CI\/CD) pipelines) can be difficult. Security is another challenge. If a single Kubernetes cluster is compromised, vulnerabilities in other clusters may be exposed. Additionally, Kubernetes has some limits that are helpful to keep in mind when considering containerized networking:<\/p>\n<ul>\n<li><strong>Application-Level Services<\/strong>: Message buses, data processing, databases, caches, cluster storage, and application-level services are not provided as built-in services.<\/li>\n<\/ul>\n<ul>\n<li><strong>Alerting:<\/strong> Kubernetes does not define alerting, logging or monitoring solutions but there are methods for gathering and exporting metrics.<\/li>\n<\/ul>\n<ul>\n<li><strong>Configuration<\/strong>: Kubernetes does not deliver or require a configuration system or language but offers an API that can work with various specifications.<\/li>\n<\/ul>\n<ul>\n<li><strong>Management<\/strong>: Kubernetes does not provide any comprehensive configuration, maintenance, management or self-healing systems.<\/li>\n<\/ul>\n<ul>\n<li><strong>Orchestration: <\/strong>Kubernetes is not only an orchestration system, but includes a set of independent, customizable control processes that manage current workflows toward a desired state. It does not require centralized control or execution of a defined workflow, which enables a system that is easier to use, extensible, robust, powerful and resilient.<strong>\u00a0<\/strong><\/li>\n<\/ul>\n<ul>\n<li><strong>PaaS:<\/strong> While Kubernetes is not a conventional PaaS system, it does allow deployment, scaling, load balancing, logging, monitoring and alerting \u2014 all optional with plugins \u2014 to ensure flexibility and user choice as needed.<\/li>\n<\/ul>\n<ul>\n<li><strong>Source Code:<\/strong> Kubernetes does not build applications or deploy source code, enabling flexibility in organizational technical requirements and preferences.<\/li>\n<\/ul>\n<p>Like any solution, Kubernetes operates within defined limits, but can also solve many issues in containerized networking. Most importantly, it allows all containers running on a cluster to communicate with containers on that cluster. It also solves for internal and external microservices as well through load balancers, and DNS, CoreDNS and external DNS plugins.<\/p>\n<p>Much more can be said about Kubernetes, but if you\u2019d like additional information or assistance in planning and deploying traditional, virtualized, container or hybrid solutions on your network, visit <a href=\"http:\/\/www.Infoblox.com\">www.Infoblox.com<\/a> or contact your Infoblox Solution Architect or Account Manager today.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One notable outcome of the Covid-19 pandemic is the impact of digital transformation and network migration to cloud-native architectures.\u00a0 By 2022, Gartner predicts more than 75% of global organizations will be running containerized applications in production, a substantial increase from less than 30% today. Michael Warrilow, research vice-president at Gartner, says, \u201cUnderstanding of \u2018cloud-native\u2019 varies, [&hellip;]<\/p>\n","protected":false},"author":168,"featured_media":1669,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[3],"tags":[71,546,31,158,16,30],"class_list":{"0":"post-6780","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-community","8":"tag-devops","9":"tag-containers","10":"tag-networking","11":"tag-kubernetes","12":"tag-infoblox","13":"tag-dns","14":"entry"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>DevOpsContainers, Networking and Kubernetes<\/title>\n<meta name=\"description\" content=\"DevOpsContainers, Networking and Kubernetes. One notable outcome of the Covid-19 pandemic is the impact of digital transformation and network migration to cloud-native architectures. By 2022, Gartner predicts more than 75% of global organizations will be running containerized applications in production, a substantial increase from less than 30% today. Michael Warrilow, research vice-president at Gartner, says, \u201cUnderstanding of \u2018cloud-native\u2019 varies, but it has significant potential benefits over traditional, monolithic application design, such as scalability, elasticity and agility. It is also strongly associated with the use of containers.\u201d (Source: https:\/\/www.computerweekly.com\/feature\/Containers-for-a-post-pandemic-IT-architecture)\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.infoblox.com\/blog\/community\/devops-containers-networking-and-kubernetes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DevOps Containers, Networking and Kubernetes\" \/>\n<meta property=\"og:description\" content=\"DevOpsContainers, Networking and Kubernetes. One notable outcome of the Covid-19 pandemic is the impact of digital transformation and network migration to cloud-native architectures. By 2022, Gartner predicts more than 75% of global organizations will be running containerized applications in production, a substantial increase from less than 30% today. Michael Warrilow, research vice-president at Gartner, says, \u201cUnderstanding of \u2018cloud-native\u2019 varies, but it has significant potential benefits over traditional, monolithic application design, such as scalability, elasticity and agility. 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This includes 14 years in technology (DDI, RPA, fintech, wireless and mobile apps, GIS and biometrics), 9 years in financial services, 3 years in healthcare and 2 years in manufacturing. He did his post-graduate work in Project Management and Quality and holds a Marketing Management BBA from Pacific Lutheran University in Tacoma, WA. He spends his personal time engaged in adult and youth ministries, coaching and watching soccer (go Liverpool FC &amp; Sounders FC), sailing, camping, and listening to a variety of Christian, jazz and instrumental music.\",\"url\":\"https:\\\/\\\/www.infoblox.com\\\/blog\\\/author\\\/bob-rose\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"DevOpsContainers, Networking and Kubernetes","description":"DevOpsContainers, Networking and Kubernetes. One notable outcome of the Covid-19 pandemic is the impact of digital transformation and network migration to cloud-native architectures. 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It is also strongly associated with the use of containers.\u201d (Source: https:\/\/www.computerweekly.com\/feature\/Containers-for-a-post-pandemic-IT-architecture)","og_url":"https:\/\/www.infoblox.com\/blog\/community\/devops-containers-networking-and-kubernetes\/","og_site_name":"Infoblox Blog","article_published_time":"2021-07-30T23:09:12+00:00","article_modified_time":"2021-08-02T16:03:54+00:00","og_image":[{"width":660,"height":454,"url":"https:\/\/www.infoblox.com\/blog\/wp-content\/uploads\/community-banner-13.jpg","type":"image\/jpeg"}],"author":"Bob Rose","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Bob Rose","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.infoblox.com\/blog\/community\/devops-containers-networking-and-kubernetes\/#article","isPartOf":{"@id":"https:\/\/www.infoblox.com\/blog\/community\/devops-containers-networking-and-kubernetes\/"},"author":{"name":"Bob Rose","@id":"https:\/\/www.infoblox.com\/blog\/#\/schema\/person\/e3a21a946a9f6a3cc19856eabf95c687"},"headline":"DevOps Containers, Networking and Kubernetes","datePublished":"2021-07-30T23:09:12+00:00","dateModified":"2021-08-02T16:03:54+00:00","mainEntityOfPage":{"@id":"https:\/\/www.infoblox.com\/blog\/community\/devops-containers-networking-and-kubernetes\/"},"wordCount":955,"publisher":{"@id":"https:\/\/www.infoblox.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.infoblox.com\/blog\/community\/devops-containers-networking-and-kubernetes\/#primaryimage"},"thumbnailUrl":"https:\/\/www.infoblox.com\/blog\/wp-content\/uploads\/community-banner-13.jpg","keywords":["DevOps","containers","Networking","Kubernetes","Infoblox","DNS"],"articleSection":["Community"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.infoblox.com\/blog\/community\/devops-containers-networking-and-kubernetes\/","url":"https:\/\/www.infoblox.com\/blog\/community\/devops-containers-networking-and-kubernetes\/","name":"DevOpsContainers, Networking and Kubernetes","isPartOf":{"@id":"https:\/\/www.infoblox.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.infoblox.com\/blog\/community\/devops-containers-networking-and-kubernetes\/#primaryimage"},"image":{"@id":"https:\/\/www.infoblox.com\/blog\/community\/devops-containers-networking-and-kubernetes\/#primaryimage"},"thumbnailUrl":"https:\/\/www.infoblox.com\/blog\/wp-content\/uploads\/community-banner-13.jpg","datePublished":"2021-07-30T23:09:12+00:00","dateModified":"2021-08-02T16:03:54+00:00","description":"DevOpsContainers, Networking and Kubernetes. One notable outcome of the Covid-19 pandemic is the impact of digital transformation and network migration to cloud-native architectures. By 2022, Gartner predicts more than 75% of global organizations will be running containerized applications in production, a substantial increase from less than 30% today. Michael Warrilow, research vice-president at Gartner, says, \u201cUnderstanding of \u2018cloud-native\u2019 varies, but it has significant potential benefits over traditional, monolithic application design, such as scalability, elasticity and agility. 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This includes 14 years in technology (DDI, RPA, fintech, wireless and mobile apps, GIS and biometrics), 9 years in financial services, 3 years in healthcare and 2 years in manufacturing. He did his post-graduate work in Project Management and Quality and holds a Marketing Management BBA from Pacific Lutheran University in Tacoma, WA. 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