# Google Cloud Platform (GCP)
#### Instance Template
Steps:
1. 建立 VM Instance (via web)
2. 關閉 VM Instance
3. 建立 Custom Image for VM Instance (via web)
4. 建立 Instance Template for Custom Image (via web)
- Boot Disk: Custom Image
- Region: Global (Recommend)
5. 用 Instance Template 新增多個 VM Instances（via CLI or web）
```bash
# sets up the authentication
gcloud init
# create new VM instances with the template named vm1-template
gcloud compute instances create --zone "Zone" --source-instance-template vm1-template vm2 vm3 vm4 vm5 vm6 vm7 vm8
gcloud compute instances list
```
其他方式大量部署 VM
- [Getting started on GCP with Terraform](https://cloud.google.com/community/tutorials/getting-started-on-gcp-with-terraform)
- [Creating groups of unmanaged instances](https://cloud.google.com/compute/docs/instance-groups/creating-groups-of-unmanaged-instances)
#### Quotas
- [https://cloud.google.com/compute/quotas#understanding\_vm\_cpu\_and\_ip\_address\_quotas](https://cloud.google.com/compute/quotas#understanding_vm_cpu_and_ip_address_quotas)
- [https://docs.aws.amazon.com/general/latest/gr/aws\_service\_limits.html](https://docs.aws.amazon.com/general/latest/gr/aws_service_limits.html)
- [https://docs.microsoft.com/en-us/azure/azure-subscription-service-limits#service-specific-limits](https://docs.microsoft.com/en-us/azure/azure-subscription-service-limits#service-specific-limits)
#### Active Cloud Shell
Cloud Shell is a virtual machine that is loaded with development tools. It offers a persistent 5GB home directory and runs on the Google Cloud. Cloud Shell provides command-line access to your Google Cloud resources.
> Tip: Cloud Shell 環境已經預裝好 GCP SDK, docker 等開發工具，可以用來執行 gcloud 指令，或者簡易的 docker 操作。
在 GCP 控制台點擊右上角 **Activate Cloud Shell**。
```bash
gcloud auth list
```
```
ACTIVE: *
ACCOUNT: alang.hsu@gmail.com
To set the active account, run:
$ gcloud config set account `ACCOUNT`
```
```bash
gcloud config list project
```
```
[core]
project =
```