markdown 用于在Centos 7上创建VSI和安装Docker Engine的Terraform示例文件

Posted 2021-05-06

## Export Variables

Substitute actual user and API key for `SL_USERNAME` and `SL_API_KEY`
```
export TF_VAR_slusername="SL_USERNAME"
export TF_VAR_slapikey="SL_API_KEY"
```

## Create terraform file
User will need to change the `pub_vlan` and `priv_vlan` default vaules to match the Vlans they want to deploy to: 

```
variable slusername {}
variable slapikey {}
# The target operating system for the web nodes
variable os {
  default = "CENTOS_7_64"
}

# The number of cores each web virtual guest will recieve
variable vm_cores {
  default = 1
}
# The amount of memory each web virtual guest will recieve
variable vm_memory {
  default = 2048
}

variable pub_vlan {
  default = xxxxx
}

# The private vlan to deploy the virtual guests on to
variable priv_vlan {
  default = xxxxx
}

provider "ibm" {
  softlayer_username = "${var.slusername}"
  softlayer_api_key  = "${var.slapikey}"
}

resource "ibm_compute_vm_instance" "node" {
    hostname = "myhost"
    domain = "example.com"
    os_reference_code = "${var.os}"
    datacenter = "dal13"
    network_speed = 1000
    hourly_billing = true
    private_network_only = false
    cores = "${var.vm_cores}"
    memory = "${var.vm_memory}"
    disks = [100]
    local_disk = false
    public_vlan_id = "${var.pub_vlan}"
    private_vlan_id = "${var.priv_vlan}"
    provisioner "file" {
    source      = "postinstall.sh"
    destination = "/tmp/postinstall.sh"
    }
    provisioner "remote-exec" {
    inline = [
      "chmod +x /tmp/postinstall.sh",
      "/tmp/postinstall.sh",
    ]
    }
}
```

## Post install script

```
#!/usr/bin/env bash
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install docker-ce -y
```