\ud83d\udc49\ud83c\udffb \ub864\ub9c1 \uc5c5\ub370\uc774\ud2b8 \/ Rolling Update<\/p>\n\n\n\n
\u2714\ufe0f \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \ubb34\uc911\ub2e8\uc73c\ub85c \uc810\uc9c4\uc801\uc73c\ub85c \uc0c8\ub85c\uc6b4 \ubc84\uc804\uc73c\ub85c \uad50\uccb4\ud558\ub294 \uacfc\uc815\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.
It refers to the process of gradually replacing an application with a new version without interruption.<\/p>\n\n\n\n
\ud83d\udc49\ud83c\udffb \uc2a4\ucf00\uc77c\ub9c1 \/ Scaling<\/p>\n\n\n\n
\u2714\ufe0f \uc2dc\uc2a4\ud15c\uc774\ub098 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uc790\uc6d0\uc758 \uc591\uc744 \ub298\ub9ac\uac70\ub098 \uc904\uc5ec\uc11c \ucc98\ub9ac \ub2a5\ub825\uc774\ub098 \uc131\ub2a5\uc744 \uc870\uc808\ud558\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.
It refers to adjusting processing power or performance in a system or application by increasing or decreasing the amount of resources.<\/p>\n\n\n\n
\ud83d\udc49\ud83c\udffb ClusterIP\uc640 NodePort\uc758 \ucc28\uc774
Difference between ClusterIP and NodePort<\/p>\n\n\n\n
\u2714\ufe0f ClusterIP <\/p>\n\n\n\n
— \uae30\ubcf8 \uc11c\ube44\uc2a4 \ud0c0\uc785\uc785\ub2c8\ub2e4. \/ This is the basic service type.<\/p>\n\n\n\n
— \uc678\ubd80\uc5d0\uc11c \uc9c1\uc811 \uc811\uadfc\ud560 \uc218 \uc5c6\uace0, \ud074\ub7ec\uc2a4\ud130 \ub0b4\ubd80 \ud1b5\uc2e0\uc6a9\uc73c\ub85c \uc8fc\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.
It cannot be accessed directly from the outside and is primarily used for internal cluster communication.<\/p>\n\n\n\n
\u2714\ufe0f NodePort<\/p>\n\n\n\n
— \ud074\ub7ec\uc2a4\ud130 \ub0b4\ubd80\ubfd0 \uc544\ub2c8\ub77c, \uac01 \uc6cc\ucee4 \ub178\ub4dc\uc5d0\uc11c \uc9c0\uc815\ub41c \ud3ec\ud2b8(30000 ~ 32767 \ubc94\uc704)\ub97c \ud1b5\ud574 \uc678\ubd80\uc5d0\uc11c \ub178\ub4dc IP\uc640 \uc774 \ud3ec\ud2b8\ub97c \ud1b5\ud574 \uc811\uadfc\uc774 \uac00\ub2a5\ud569\ub2c8\ub2e4.
In addition to within the cluster, external access is possible through the node IP and the designated port (range 30000 to 32767) on each worker node.<\/p>\n\n\n\n
— ClusterIP\ub294 \ud074\ub7ec\uc2a4\ud130 \ub0b4\ubd80 \uc804\uc6a9 \ub124\ud2b8\uc6cc\ud06c\ub85c \uc11c\ube44\uc2a4\uc5d0 \uc811\uadfc\ud560 \ub54c, NodePort\ub294 \uc678\ubd80\uc5d0\uc11c\ub3c4(\ub178\ub4dc IP + \uc9c0\uc815 \ud3ec\ud2b8\ub85c) \uc811\uadfc\uc744 \uac00\ub2a5\ud558\uac8c \ud574\uc8fc\ub294 \uc11c\ube44\uc2a4 \ud0c0\uc785\uc785\ub2c8\ub2e4.
ClusterIP is a service type that allows access to the service via a private network within the cluster, while NodePort enables access from the outside (via Node IP + specified port).<\/p>\n\n\n\n
\ud83d\udc49\ud83c\udffb \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ud655\uc7a5(\uc2a4\ucf00\uc77c\ub9c1) \ubc0f \ub864\ub9c1 \uc5c5\ub370\uc774\ud2b8
Application scaling and rolling updates<\/p>\n\n\n\n
\u2714\ufe0f nginx-deployment.yaml<\/p>\n\n\n\n
apiVersion: apps\/v1\nkind: Deployment\nmetadata:\n name: nginx-deployment\nspec:\n replicas: 1\n selector:\n matchLabels:\n app: nginx\n template:\n metadata:\n labels:\n app: nginx\n spec:\n containers:\n - name: nginx\n image: nginx:latest\n ports:\n - containerPort: 80<\/code><\/pre>\n\n\n\n— yaml\ud30c\uc77c \uc801\uc6a9 \/ Apply YAML file<\/p>\n\n\n\n
kubectl apply -f nginx-deployment.yaml<\/code><\/pre>\n\n\n\n\u2714\ufe0f \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ud655\uc7a5 (Replica \uc218 \uc870\uc808)
Application expansion (controlling the number of replicas)<\/p>\n\n\n\n
— \ud604\uc7ac pod \uc218\uac00 1\uac1c\ub97c(replicas: 1<\/code>) 3\uac1c\ub85c \ud655\uc7a5\ud569\ub2c8\ub2e4.
Expands the current pod count from 1 (replicas: 1) to 3.<\/p>\n\n\n\nkubectl scale deployment nginx-deployment --replicas=3<\/code><\/pre>\n\n\n\n\u2714\ufe0f \ub864\ub9c1 \uc5c5\ub370\uc774\ud2b8 \/ rolling updates<\/p>\n\n\n\n
— nginx1.23\ubc84\uc804\uc73c\ub85c \uad50\uccb4 \/ Replaced with nginx version 1.23<\/p>\n\n\n\n
— deployment(nginx-deployment)\uc5d0\uc11c nginx\ub77c\ub294 \uc774\ub984\uc758 \ucee8\ud14c\uc774\ub108 \uc774\ubbf8\uc9c0\ub97c nginx:1.23\uc73c\ub85c \uad50\uccb4\ud569\ub2c8\ub2e4.
Replace the container image named nginx in deployment(nginx-deployment) with nginx:1.23.<\/p>\n\n\n\n
kubectl set image deployment\/nginx-deployment nginx=nginx:1.23<\/code><\/pre>\n\n\n\n— \uc5c5\ub370\uc774\ud2b8 \uc9c4\ud589\uc0c1\ud0dc \ubcf4\uae30 \/ View update progress<\/p>\n\n\n\n
kubectl rollout status deployment\/nginx-deployment<\/code><\/pre>\n\n\n\n— \ud604\uc7ac \ubc30\ud3ec(Deployment)\uc758 \uc0c1\ud0dc\ub97c \uc774\uc804 \uc131\uacf5\uc801\uc774\uc5c8\ub358 \ubc84\uc804\uc73c\ub85c \ub418\ub3cc\ub9ac\ub294 \ub864\ubc31 \uba85\ub839\uc785\ub2c8\ub2e4.
This is a rollback command that reverts the current deployment state to a previously successful version.<\/p>\n\n\n\n
kubectl rollout undo deployment\/nginx-deployment<\/code><\/pre>\n\n\n\n\u2714\ufe0f \uc2e4\uc81c \uc791\uc5c5 \/ actual work<\/p>\n\n\n\n
–\ucee8\ud2b8\ub864 \ud50c\ub808\uc778\uc5d0\uc11c \ub3c4\ucee4\uc774\ubbf8\uc9c0 \ub2e4\uc6b4\ub85c\ub4dc(nginx:1.23\uc774 \uc5c6\ub294 \uacbd\uc6b0)
Download Docker image from the control plane (if nginx:1.23 is not available)<\/p>\n\n\n\n
docker pull nginx:1.23<\/code><\/pre>\n\n\n\n–\ub2e4\uc6b4\ub85c\ub4dc\ub41c \uc774\ubbf8\uc9c0 \ud655\uc778 \/ Check downloaded images
(nginx:1.23 <\/strong> f5747a42e3ad 205MB 55.6MB <\/strong>)<\/p>\n\n\n\nMacBookAir nginx-test1 % docker images<\/strong>\n i Info \u2192 U In Use\nIMAGE ID DISK USAGE CONTENT SIZE EXTRA\ndocker\/desktop-cloud-provider-kind:v0.5.0 4ad59ce20658 574MB 150MB U \ndocker\/desktop-containerd-registry-mirror:v0.0.3 179a9ea3ae47 48.8MB 15.5MB U \ndocker\/desktop-kubernetes:kubernetes-v1.34.1-cni-v1.7.1-critools-v1.33.0-cri-dockerd-v0.3.20-1-debian 12d6673564e0 552MB 169MB \ndocker\/desktop-storage-provisioner:v3.0 57d2b6ad1c6f 75.4MB 21.9MB \ndocker\/desktop-vpnkit-controller:v4.0 bdaff3408b1c 50MB 10.7MB \nenvoyproxy\/envoy:v1.36.4 08acc53db6f4 233MB 58.8MB \nkindest\/node:v1.31.1 cd224d8da58d 1.47GB 413MB \nkindest\/node:v1.35.1 05d7bcdefbda 1.26GB 346MB U \nnginx:1.23 <\/strong> f5747a42e3ad 205MB 55.6MB <\/strong> \nnginx:latest 6e23479198b9 258MB 64.2MB \nregistry.k8s.io\/coredns\/coredns:v1.11.3 9caabbf6238b 81.8MB 16.9MB \nregistry.k8s.io\/coredns\/coredns:v1.12.1 e8c262566636 95.8MB 20.4MB \nregistry.k8s.io\/etcd:3.5.16-0 c6a9d11cc5c0 213MB 67.9MB \nregistry.k8s.io\/etcd:3.6.4-0 e36c08168342 306MB 98.2MB \nregistry.k8s.io\/kube-apiserver:v1.32.2 c47449f3e751 123MB 26.2MB \nregistry.k8s.io\/kube-apiserver:v1.34.1 b9d7c117f8ac 112MB 24.5MB \nregistry.k8s.io\/kube-controller-manager:v1.32.2 399aa50f4d13 114MB 24MB \nregistry.k8s.io\/kube-controller-manager:v1.34.1 2bf47c1b01f5 95.5MB 20.6MB \nregistry.k8s.io\/kube-proxy:v1.32.2 83c025f0faa6 128MB 27.4MB \nregistry.k8s.io\/kube-proxy:v1.34.1 913cc83ca0b5 101MB 22.8MB \nregistry.k8s.io\/kube-scheduler:v1.32.2 45710d74cfd5 90.1MB 18.9MB \nregistry.k8s.io\/kube-scheduler:v1.34.1 6e9fbc4e25a5 69.6MB 15.7MB \nregistry.k8s.io\/pause:3.10 ee6521f290b2 786kB 266kB \n<\/code><\/pre>\n\n\n\n— \ub864\ub9c1 \uc5c5\ub370\uc774\ud2b8 \uc2e4\ud589 \/ Run rolling update <\/p>\n\n\n\n
kubectl set image deployment\/nginx-deployment nginx=nginx:1.23<\/code><\/pre>\n\n\n\n— \ubaa8\ub4e0pod\uc5d0 nginx:1.23\uc5d0 \uc801\uc6a9\ub410\ub294\uc9c0 \ud655\uc778\ud558\uae30(\uc774\ubbf8\uc9c0 \uc801\uc6a9)
Check if nginx:1.23 has been applied to all pods (apply image)<\/p>\n\n\n\n
MacBookAir nginx-test1 % kubectl set image deployment\/nginx-deployment nginx=nginx:1.23<\/strong>\ndeployment.apps\/nginx-deployment image updated\nMacBookAir nginx-test1 % kubectl get pods<\/strong>\nNAME READY STATUS RESTARTS AGE\nnginx-deployment-7878ff98b4-597k4<\/strong> 1\/1 Running 0 3s\nnginx-deployment-7878ff98b4-mqm62 1\/1 Running 0 7s\nnginx-deployment-7878ff98b4-nwn9r 1\/1 Running 0 5s\nMacBookAir nginx-test1 % kubectl describe pod nginx-deployment-7878ff98b4-597k4<\/strong>\n\n... \uc911\uac04 \uc0dd\ub7b5 \/ skipping the middle ...\n\nEvents:\n Type Reason Age From Message\n ---- ------ ---- ---- -------\n Normal Scheduled 41s default-scheduler Successfully assigned default\/nginx-deployment-7878ff98b4-597k4 to desktop-worker\n Normal Pulling 41s kubelet Pulling image \"nginx:1.23\"<\/strong>\n Normal Pulled 41s kubelet Successfully pulled image <\/strong>\"nginx:1.23\" in 8ms (8ms including waiting). Image size: 55571911 bytes.\n Normal Created 41s kubelet Container created\n Normal Started 41s kubelet Container started\n<\/code><\/pre>\n\n\n\n\ud83d\udc49\ud83c\udffb \uc6cc\ucee4\ub178\ub4dc \uc811\uc18d \ud655\uc778 \ud558\uae30 \/ Check worker node connection<\/p>\n\n\n\n
\u2714\ufe0f NodePort\ub85c deployment \ub178\ucd9c\ud558\uae30 \/ Exposing a deployment via NodePort<\/p>\n\n\n\n
MacBookAir nginx-test1 % kubectl expose deployment nginx-deployment --type=NodePort --port=80<\/code><\/pre>\n\n\n\n\u2714\ufe0f nodeIP \ud655\uc778\ud558\uae30 \/ Check nodeIP<\/p>\n\n\n\n
MacBookAir ~ % kubectl get nodes -o wide<\/strong>\nNAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME\ndesktop-control-plane Ready control-plane 28h v1.35.1 172.18.0.3 <none> Debian GNU\/Linux 13 (trixie) 6.12.69-linuxkit containerd:\/\/2.2.1\ndesktop-worker<\/strong> Ready <none> 28h v1.35.1 172.18.0.6 <\/strong> <none> Debian GNU\/Linux 13 (trixie) 6.12.69-linuxkit containerd:\/\/2.2.1\ndesktop-worker2 <\/strong> Ready <none> 28h v1.35.1 172.18.0.4 <\/strong> <none> Debian GNU\/Linux 13 (trixie) 6.12.69-linuxkit containerd:\/\/2.2.1<\/code><\/pre>\n\n\n\n— \uc11c\ube44\uc2a4 \uc0dd\uc131\ud655\uc778(\ud3ec\ud2b8\ubc88\ud638 32497 \ud655\uc778)
Verify service creation (verify port number 32497)<\/p>\n\n\n\n
MacBookAir nginx-test1 % kubectl get svc<\/strong>\nNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE\nkubernetes ClusterIP 10.96.0.1 <none> 443\/TCP 28h\nnginx-deployment NodePort 10.96.49.237 <none> 80:32497<\/strong>\/TCP 2m43s<\/code><\/pre>\n\n\n\n— \uc6cc\ucee4\ub178\ub4dc \uc811\uc18d \/ Worker node connection<\/p>\n\n\n\n
# worker node 1\nMacBookAir nginx-test1 % docker exec -it desktop-worker bash\n\n# worker node 2\nMacBookAir nginx-test1 % docker exec -it desktop-worker2 bash<\/code><\/pre>\n\n\n\n— \uc6cc\ucee4 \ub178\ub4dc\uc5d0\uc11c nginx\uc5d0 \uc811\uc18d\ud574 \ubcf4\uae30 \/ Trying to access nginx from a worker node<\/p>\n\n\n\n
root@desktop-worker:\/# curl 172.18.0.6:32497<\/strong>\n<!DOCTYPE html>\n<html>\n<head>\n<title>Welcome to nginx!<\/title>\n<style>\nhtml { color-scheme: light dark; }\nbody { width: 35em; margin: 0 auto;\nfont-family: Tahoma, Verdana, Arial, sans-serif; }\n<\/style>\n<\/head>\n<body>\n<h1>Welcome to nginx!<\/h1>\n<p>If you see this page, the nginx web server is successfully installed and\nworking. Further configuration is required.<\/p>\n\n<p>For online documentation and support please refer to\n<a href=\"http:\/\/nginx.org\/\">nginx.org<\/a>.<br\/>\nCommercial support is available at\n<a href=\"http:\/\/nginx.com\/\">nginx.com<\/a>.<\/p>\n\n<p><em>Thank you for using nginx.<\/em><\/p>\n<\/body>\n<\/html>\n<\/code><\/pre>\n\n\n\n— \uc6cc\ucee4 \ub178\ub4dc2\ub294 \uc544\ub798\ucc98\ub7fc \uc811\uc18d\ud569\ub2c8\ub2e4. \/ Worker Node 2 connects as follows.<\/p>\n\n\n\n
# curl 172.18.0.4:32497<\/code><\/pre>\n\n\n\n\ud83d\udc49\ud83c\udffb\ube0c\ub77c\uc6b0\uc800 \uc811\uc18d\ud558\uae30 \/ Access browser<\/p>\n\n\n\n
\u2714\ufe0f \ud130\ubbf8\ub110\uc5d0\uc11c 8080\ud3ec\ud2b8\ub85c NodePort 80\ud3ec\ud2b8\uc640 \uc5f0\uacb0
Connect NodePort 80 to port 8080 in the terminal<\/p>\n\n\n\n
MacBookAir nginx-test1 % kubectl port-forward svc\/nginx-deployment 8080:80\nForwarding from 127.0.0.1:8080 -> 80\nForwarding from [::1]:8080 -> 80<\/code><\/pre>\n\n\n\n\u2714\ufe0f \ube0c\ub77c\uc6b0\uc800\uc5d0\uc11c localhost:8080\uc73c\ub85c \uc811\uc18d\ud558\uba74 “Welcome to nginx”\ud654\uba74\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4.
If you access localhost:8080 in your browser, you can see the “Welcome to nginx” screen.<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\ud83d\udc49\ud83c\udffb \ub864\ub9c1 \uc5c5\ub370\uc774\ud2b8 \/ Rolling Update \u2714\ufe0f \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \ubb34\uc911\ub2e8\uc73c\ub85c \uc810\uc9c4\uc801\uc73c\ub85c \uc0c8\ub85c\uc6b4 \ubc84\uc804\uc73c\ub85c \uad50\uccb4\ud558\ub294 \uacfc\uc815\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.It refers to the process of gradually replacing an application with a new version without interruption. \ud83d\udc49\ud83c\udffb \uc2a4\ucf00\uc77c\ub9c1 \/ Scaling \u2714\ufe0f \uc2dc\uc2a4\ud15c\uc774\ub098 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uc790\uc6d0\uc758 \uc591\uc744 \ub298\ub9ac\uac70\ub098 \uc904\uc5ec\uc11c \ucc98\ub9ac \ub2a5\ub825\uc774\ub098 \uc131\ub2a5\uc744 \uc870\uc808\ud558\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.It refers to adjusting processing power or performance in […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-5475","post","type-post","status-publish","format-standard","hentry","category-kubernetes","missing-thumbnail"],"_links":{"self":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/5475","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/comments?post=5475"}],"version-history":[{"count":13,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/5475\/revisions"}],"predecessor-version":[{"id":5489,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/5475\/revisions\/5489"}],"wp:attachment":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/media?parent=5475"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/categories?post=5475"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/tags?post=5475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}