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IT Cloud

Shtoltc Eugeny

module.Nginx.kubernetes_service.nodejs

essh @ kubernetes-master: ~ / node-cluster $ ./terraform destroy -target = module.nodejs.kubernetes_deployment.nodejs

essh @ kubernetes-master: ~ / node-cluster $ ./terraform apply

Now let's replace the code of our container:

container {

image = "gcr.io/node-cluster-243923/nodejs_cluster:latest"

name = "node-js"

}

Let's check the result of balancing for different nodes (no line break at the end of the output):

essh @ kubernetes-master: ~ / node-cluster $ curl http://35.246.85.138:80

Nodejs_cluster is working! My host is terraform-nodejs-997fd5c9c-lqg48essh @ kubernetes-master: ~ / node-cluster $ curl http://35.246.85.138:80

Nodejs_cluster is working! My host is terraform-nodejs-997fd5c9c-lhgsnessh @ kubernetes-master: ~ / node-cluster $ curl http://35.246.85.138:80

Nodejs_cluster is working! My host is terraform-nodejs-997fd5c9c-lqg48essh @ kubernetes-master: ~ / node-cluster $ curl http://35.246.85.138:80

Nodejs_cluster is working! My host is terraform-nodejs-997fd5c9c-lhgsnessh @ kubernetes-master: ~ / node-cluster $ curl http://35.246.85.138:80

Nodejs_cluster is working! My host is terraform-nodejs-997fd5c9c-lqg48essh @ kubernetes-master: ~ / node-cluster $

We will automate the process of creating images, for this we will use the Google Cloud Build service (free for 5 users and traffic up to 50GB) to create a new image when creating a new version (tag) in the Cloud Source Repositories repository (free on Google Cloud Platform Free Tier). Google Cloud Platform -> Menu -> Tools -> Cloud Build -> Triggers -> Enable Cloud Build API -> Get Started -> Create a repository that will be available on Google Cloud Platform -> Menu -> Tools -> Source Code Repositories (Cloud Source Repositories):

essh @ kubernetes-master: ~ / node-cluster $ cd app /

essh @ kubernetes-master: ~ / node-cluster / app $ ls

server.js

essh @ kubernetes-master: ~ / node-cluster / app $ mv ./server.js ../

essh @ kubernetes-master: ~ / node-cluster / app $ gcloud source repos clone nodejs –project = node-cluster-243923

Cloning into '/ home / essh / node-cluster / app / nodejs' …

warning: You appear to have cloned an empty repository.

Project [node-cluster-243923] repository [nodejs] was cloned to [/ home / essh / node-cluster / app / nodejs].

essh @ kubernetes-master: ~ / node-cluster / app $ ls -a

… .. nodejs

essh @ kubernetes-master: ~ / node-cluster / app $ ls nodejs /

essh @ kubernetes-master: ~ / node-cluster / app $ ls -a nodejs /

… .. .git

essh @ kubernetes-master: ~ / node-cluster / app $ cd nodejs /

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ mv ../../server.js.

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git add server.js

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git commit -m 'test server'

[master (root-commit) 46dd957] test server

1 file changed, 7 insertions (+)

create mode 100644 server.js

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git push -u origin master

Counting objects: 3, done.

Delta compression using up to 8 threads.

Compressing objects: 100% (2/2), done.

Writing objects: 100% (3/3), 408 bytes | 408.00 KiB / s, done.

Total 3 (delta 0), reused 0 (delta 0)

To https://source.developers.google.com/p/node-cluster-243923/r/nodejs

* [new branch] master -> master

Branch 'master' set up to track remote branch 'master' from 'origin'.

Now it's time to set up image creation when creating a new version of the product: go to GCP -> Cloud Build -> triggers -> Create trigger -> Google Cloud source code repository -> NodeJS. Trigger tag type so that the image is not created during normal commits. I will change the name of the image from gcr.io/node-cluster-243923/NodeJS:$SHORT_SHA to gcr.io/node-cluster-243923/NodeJS:$SHORT_SHA and the timeout to 60 seconds. Now I'll commit and add a tag:

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ cp ../../Dockerfile.

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git add Dockerfile

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ cp ../../Dockerfile.

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git add Dockerfile

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git commit -m 'add Dockerfile'

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git remote -v

origin https://source.developers.google.com/p/node-cluster-243923/r/nodejs (fetch)

origin https://source.developers.google.com/p/node-cluster-243923/r/nodejs (push)

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git push origin master

Counting objects: 3, done.

Delta compression using up to 8 threads.

Compressing objects: 100% (3/3), done.

Writing objects: 100% (3/3), 380 bytes | 380.00 KiB / s, done.

Total 3 (delta 0), reused 0 (delta 0)

To https://source.developers.google.com/p/node-cluster-243923/r/nodejs

46dd957..b86c01d master -> master

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git tag

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git tag -a v0.0.1 -m 'test to run'

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git push origin v0.0.1

Counting objects: 1, done.

Writing objects: 100% (1/1), 161 bytes | 161.00 KiB / s, done.

Total 1 (delta 0), reused 0 (delta 0)

To https://source.developers.google.com/p/node-cluster-243923/r/nodejs

* [new tag] v0.0.1 -> v0.0.1

Now, if we press the start trigger button, we will see the image in the Container Registry with our tag:

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ gcloud container images list

NAME

gcr.io/node-cluster-243923/nodejs

gcr.io/node-cluster-243923/nodejs_cluster

Only listing images in gcr.io/node-cluster-243923. Use –repository to list images in other repositories.

Now if we just add the changes and the tag, the image will be created automatically:

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ sed -i 's / HOSTNAME } / HOSTNAME } n /' server.js

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git add server.js

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git commit -m 'fix'

[master 230d67e] fix

1 file changed, 2 insertions (+), 1 deletion (-)

essh @ kubernetes-master: ~ / node-cluster / app / nodejs $ git push origin master

Counting objects: 3, done.

Delta compression using up to 8 threads.

Compressing objects: 100% (3/3), done.

Writing objects: 100% (3/3), 304 bytes | 304.00 KiB / s, done.

Total 3 (delta 1), reused 0 (delta 0)