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unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["containers","docker","kubernetes","swarm","tutorials"],"created_at":"2024-10-14T19:26:21.181Z","updated_at":"2026-05-18T07:35:19.652Z","avatar_url":"https://github.com/bitsofinfo.png","language":null,"funding_links":[],"categories":[],"sub_categories":[],"readme":"# kubernetes-vs-swarm\n\nThis project presents a very simple tutorial demonstrating deploying an app to both\nKubernetes and Docker Swarm to demonstrate the differences.\n\n![Diagram](/diag.png \"Diagram1\")\n\nhttps://bitsofinfo.wordpress.com/2019/01/16/kubernetes-vs-swarm-the-most-basic-primer/\n\nThis example launches the following:\n* Docker Service named `nginx1_app` available at published Swarm port: `30080`\n* Kubernetes Deployment named `nginx1` available on `NodePort` `30081`\n\nEach app has the following characteristics:\n* 2+ replicas\n* Published on a fixed high port on all nodes\n* Mounting an external volume\n* Access to a \"secret\"\n* Configured with a *\"healthcheck\"*\n\n## Prerequisites\n\nYou should have Docker for Mac/Windows installed with Kubernetes enabled.\n\nDO NOT enable the *\"Deploy Docker Stacks to Kubernetes by Default\"* option\n\nYou've done `swarm init` on your local Docker \n\n## Example\n\n### Prep the NGINX doc root volumes\n```\nmkdir -p /tmp/k8-nginxdocroot\necho \"k8 nginx\" \u003e /tmp/k8-nginxdocroot/index.html\n\nmkdir -p /tmp/swarm-nginxdocroot\necho \"swarm nginx\" \u003e /tmp/swarm-nginxdocroot/index.html\n```\n\n### Create our \"secret\" values:\n\nDocker Secret\n```\ndocker secret create nginx1_secret ./secret.txt\ndocker secret ls\n```\n\nKubernetes\n```\nkubectl create secret generic mynginx-secret --from-file=./secret.txt\nkubectl get secret mynginx-secret -o yaml\nkubectl describe secret mynginx-secret\n```\n\n### Launch our app on Docker Swarm as a Service, view and check logs\n\nDocker Service (via stack)\n```\ndocker stack deploy -c swarm-nginx1.yaml nginx1\ndocker service ls\ndocker service inspect nginx1_app\ndocker service logs --tail 100 --follow $(docker service ps nginx1_app | grep nginx1 | awk '{print $1; exit}')\n```\n\nKubernetes\n```\nkubectl create -f kubernetes-nginx1.yaml\nkubectl get all\nkubectl describe pod nginx1\nkubectl logs --tail 100 --follow $(kubectl get pods | grep nginx1 | awk '{print $1; exit}')\n```\n\n### Shell into one of the replicas:\n\nDocker Swarm\n```\ndocker exec -it $(docker ps | grep nginx1_app | awk '{print $1; exit}') /bin/bash\n```\n\nKubernetes\n```\nkubectl exec -it $(kubectl get pods | grep nginx1 | awk '{print $1; exit}') -- /bin/bash\n```\n\nOnce inside a container\nFrom within see ENV vars + secret value\n```\nenv | grep SOME_ENV_VAR\nenv | grep SECRET_PATH\ncat $SECRET_PATH\n```\n\n### Curl it!\n\nDocker Swarm\n```\ncurl http://localhost:30080\n```\n\nKubernetes\n```\ncurl http://localhost:30081\n```\n\n### Scale it\n\nDocker Swarm\n```\ndocker service scale nginx1_app=3\ndocker service ps nginx1_app\n```\n\nKubernetes\n```\nkubectl scale deployment nginx1 --replicas=3\nkubectl get pods\nkubectl describe deployment nginx1\n```\n\n### Remove\n\nDocker Swarm\n```\ndocker service rm nginx1_app\ndocker secret rm nginx1_secret\ndocker service ls\nrm -rf /tmp/swarm-nginxdocroot\n```\n\nKubernetes\n```\nkubectl delete -f kubernetes-nginx1.yaml\nkubectl delete secret mynginx-secret\nkubectl get all\nrm -rf /tmp/k8-nginxdocroot/\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fbitsofinfo%2Fkubernetes-vs-swarm","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fbitsofinfo%2Fkubernetes-vs-swarm","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fbitsofinfo%2Fkubernetes-vs-swarm/lists"}