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Apa Perbedaan Server Serverless Hosting IaaS Paas Saas Cloud Container VM Bare Metal Colocation dan Lain Lain

Sumber : https://onlineidealab.com/trending-buzzwords-by-2020-on-cloud-computing-trajectory/

Ada teman tanya mengenai hal ini. Saya jawabanya pusing karena terlalu banyak buzzword saat ini. Akhirnya saya coba tulis disini karena jawabnya harus panjang supaya gak salah paham 😀 . Saya akan mulai dari masalah, contoh solusi, serta contoh edge case nya. Dan di akhir baru saya paparkan ringkasan/resume istilah dari solusi solusi tersebut. Jadinya agak panjang. Karena umumnya kalau hanya menjelaskan pengertian/istilah, masih belum terlalu paham.

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OCI Container Registry API (Oracle Cloud)

Docker container registry menyediakan restful API sebagaimana yang ditulis disini

https://docs.docker.com/registry/spec/api/

Salah satu private registry, yaitu OCI Container Registry (OCIR) juga menggunakan repository docker-compatible. di dokumentasi OCIR, untuk API sama dengan API yang digunakan repository docker pada umumnya

https://docs.oracle.com/en-us/iaas/Content/Registry/Concepts/registryprerequisites.htm

Namun ketika dicoba sign in menggunakan user password untuk mendapatkan token, malah error, Errornya bukan unauthorized/bad request, tapi not found. berarti endpoint nya beda.

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ELK Beats/Loki Promtail Log Tidak Terbaca di Oracle Kubernetes Engine (OKE)

Konfigurasi default ELK/Loki stack adalah mengambil log dari docker container di pod yang terletak di tiap node di path /var/log/container/*.log. Namun di OKE file tersebut memang ada, tapi bukan file asli melainkan symbolic link ke file aslinya di /u01/data/docker/containers/*/.log

Sehingga pod daemonset tidak dapat mengakses file tersebut, solusinya adalah menambah volume mount /u01/data/docker/containers/*/.log ke pod daemonset Filebeats/Loki.

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Passing Parameter Antar Step di Job Oracle Visual Builder Studio/Hudson / Jenkins

Oracle visual builder studio – Builder adalah tools SaaS untuk melakukan CI/CD. Sebenernya ini hanya hudson yang di fork oleh oracle. Hudson sendiri sudah di fork oleh komunitasnya menajdi Jenkins. Namun oracle visual builder studio tidak menyediakan plugin seperti jenkins.

Mencoba menggunakan parameter, dan membuat step Unix Shell. ketika di ubah ternyata di step yang lain hasilnya tidak berubah, melainkan tetap sama dengan nilai awal parameter tersebut (entah itu default value ataupun manual input).

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Kubernetes Oracle (OCI) Tidak Bisa Autoscale Cluster/Node

Di dalam kubernetes ada beberapa jenis autoscale

Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings

Horizontal pod autoscale, menambah instance pod (Scale out). Sedangkan Vertical pod autoscale memperbesar spesifiaksi pod (cpu/memory) (Scale up). Kedua pod scaling ini juga bisa digabung. Untuk menentukan apakah mau scale up atau scale down, metrik defaultnya adalah utilisasi CPU, namun bisa juga memakai metrik lain (namun tidak resmi disupport).

Ketika pod di scale, pod akan di recreate, mencari node yang ada sisa tempat untuk diletakan pod nya. Namun bagaimana jika semua node penuh? solusinya adalah menggunakan cluster/node autoscale (Dengan menambah node baru).

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