1.8.3.1. 多可用区分布
这是一个相当常见的小技巧。多数公有云为了高可用性，都在单一区域内提供了多可用区的设计。一个可区是一个逻辑上的数据中心，单个可用区可能由于各种自然灾害、网络故障而导致不可用，所以公有云应用部署高可用应用应时刻考虑跨可用区设计。
假如我们想要创建N台不同的云主机实例，在Terraform 0.12之前的版本中，我们只能用count配合模运算来达成这个目的
variable "az" {
type = list(string)
default = [
"cn-bj2-03",
"cn-bj2-04",
]
}
variable "instance_count" {
type = number
default = 4
}
data "ucloud_images" "centos" {
name_regex = "^CentOS 7"
}
resource "ucloud_instance" "web" {
count = var.instance_count
availability_zone = var.az[count.index % length(var.az)]
image_id = data.ucloud_images.centos.images[0].id
instance_type = "n-standard-1"
charge_type = "dynamic"
name = "${var.az[count.index % length(var.az)]}-${floor(count.index/length(var.az))}"
}
简单来说就是使用count创建多实例资源时，用var.az[count.index % length(var.az)]可以循环使用每个可用区，使得机器尽可能均匀分布在各个可用区。
$ terraform apply -auto-approve
data.ucloud_images.centos: Refreshing state...
ucloud_instance.web[2]: Creating...
ucloud_instance.web[0]: Creating...
ucloud_instance.web[1]: Creating...
ucloud_instance.web[3]: Creating...
ucloud_instance.web[2]: Still creating... [10s elapsed]
ucloud_instance.web[0]: Still creating... [10s elapsed]
ucloud_instance.web[1]: Still creating... [10s elapsed]
ucloud_instance.web[3]: Still creating... [10s elapsed]
ucloud_instance.web[2]: Still creating... [20s elapsed]
ucloud_instance.web[0]: Still creating... [20s elapsed]
ucloud_instance.web[1]: Still creating... [20s elapsed]
ucloud_instance.web[3]: Still creating... [20s elapsed]
ucloud_instance.web[2]: Creation complete after 22s [id=uhost-txa2owrp]
ucloud_instance.web[3]: Creation complete after 24s [id=uhost-v3qxdbju]
ucloud_instance.web[1]: Creation complete after 26s [id=uhost-td3x545p]
ucloud_instance.web[0]: Still creating... [30s elapsed]
ucloud_instance.web[0]: Still creating... [40s elapsed]
ucloud_instance.web[0]: Creation complete after 43s [id=uhost-scq1prqj]
Apply complete! Resources: 4 added, 0 changed, 0 destroyed.
我们可以看一下创建的主机信息：
$ terraform show
# data.ucloud_images.centos:
data "ucloud_images" "centos" {
id = "475496684"
ids = [
"uimage-22noyd",
"uimage-3p0wg0",
"uimage-4keil1",
"uimage-aqvo5l",
"uimage-f1chxn",
"uimage-hq5elw",
"uimage-rkn1v2",
]
images = [
{
availability_zone = "cn-bj2-02"
create_time = "2019-04-23T17:39:46+08:00"
description = ""
features = [
"NetEnhanced",
"HotPlug",
]
id = "uimage-rkn1v2"
name = "CentOS 7.0 64位"
os_name = "CentOS 7.0 64位"
os_type = "linux"
size = 20
status = "Available"
type = "base"
},
{
availability_zone = "cn-bj2-02"
create_time = "2019-04-16T21:05:03+08:00"
description = ""
features = [
"NetEnhanced",
"HotPlug",
]
id = "uimage-f1chxn"
name = "CentOS 7.2 64位"
os_name = "CentOS 7.2 64位"
os_type = "linux"
size = 20
status = "Available"
type = "base"
},
{
availability_zone = "cn-bj2-02"
create_time = "2019-09-09T11:40:31+08:00"
description = " "
features = [
"NetEnhanced",
"HotPlug",
]
id = "uimage-aqvo5l"
name = "CentOS 7.4 64位"
os_name = "CentOS 7.4 64位"
os_type = "linux"
size = 20
status = "Available"
type = "base"
},
{
availability_zone = "cn-bj2-02"
create_time = "2020-05-07T17:40:42+08:00"
description = ""
features = [
"NetEnhanced",
"HotPlug",
"CloudInit",
]
id = "uimage-hq5elw"
name = "CentOS 7.6 64位"
os_name = "CentOS 7.6 64位"
os_type = "linux"
size = 20
status = "Available"
type = "base"
},
{
availability_zone = "cn-bj2-02"
create_time = "2019-04-16T21:05:05+08:00"
description = ""
features = [
"NetEnhanced",
"HotPlug",
]
id = "uimage-3p0wg0"
name = "CentOS 7.3 64位"
os_name = "CentOS 7.3 64位"
os_type = "linux"
size = 20
status = "Available"
type = "base"
},
{
availability_zone = "cn-bj2-02"
create_time = "2019-04-16T21:05:02+08:00"
description = ""
features = [
"NetEnhanced",
"HotPlug",
]
id = "uimage-4keil1"
name = "CentOS 7.1 64位"
os_name = "CentOS 7.1 64位"
os_type = "linux"
size = 20
status = "Available"
type = "base"
},
{
availability_zone = "cn-bj2-02"
create_time = "2019-04-16T21:04:53+08:00"
description = ""
features = [
"NetEnhanced",
"HotPlug",
]
id = "uimage-22noyd"
name = "CentOS 7.5 64位"
os_name = "CentOS 7.5 64位"
os_type = "linux"
size = 20
status = "Available"
type = "base"
},
]
most_recent = false
name_regex = "^CentOS 7"
total_count = 7
}
# ucloud_instance.web[1]:
resource "ucloud_instance" "web" {
auto_renew = true
availability_zone = "cn-bj2-04"
boot_disk_size = 20
boot_disk_type = "local_normal"
charge_type = "dynamic"
cpu = 1
cpu_platform = "Intel/Broadwell"
create_time = "2020-11-28T23:09:04+08:00"
disk_set = [
{
id = "df06380a-00e1-42df-8c07-eec67d817f97"
is_boot = true
size = 20
type = "local_normal"
},
]
expire_time = "2020-11-29T00:09:06+08:00"
id = "uhost-td3x545p"
image_id = "uimage-dhe5m2"
instance_type = "n-standard-1"
ip_set = [
{
internet_type = "Private"
ip = "10.9.44.37"
},
]
memory = 4
name = "cn-bj2-04-0"
private_ip = "10.9.44.37"
root_password = (sensitive value)
security_group = "firewall-juhsrlvr"
status = "Running"
subnet_id = "subnet-dtu3dgpr"
tag = "Default"
vpc_id = "uvnet-f1c3jq2b"
}
# ucloud_instance.web[2]:
resource "ucloud_instance" "web" {
auto_renew = true
availability_zone = "cn-bj2-03"
boot_disk_size = 20
boot_disk_type = "local_normal"
charge_type = "dynamic"
cpu = 1
cpu_platform = "Intel/IvyBridge"
create_time = "2020-11-28T23:09:01+08:00"
disk_set = [
{
id = "1d7f07c9-7342-431b-85bb-d3ee0022063d"
is_boot = true
size = 20
type = "local_normal"
},
]
expire_time = "2020-11-29T00:09:02+08:00"
id = "uhost-txa2owrp"
image_id = "uimage-pxplaj"
instance_type = "n-standard-1"
ip_set = [
{
internet_type = "Private"
ip = "10.9.45.234"
},
]
memory = 4
name = "cn-bj2-03-1"
private_ip = "10.9.45.234"
root_password = (sensitive value)
security_group = "firewall-juhsrlvr"
status = "Running"
subnet_id = "subnet-dtu3dgpr"
tag = "Default"
vpc_id = "uvnet-f1c3jq2b"
}
# ucloud_instance.web[3]:
resource "ucloud_instance" "web" {
auto_renew = true
availability_zone = "cn-bj2-04"
boot_disk_size = 20
boot_disk_type = "local_normal"
charge_type = "dynamic"
cpu = 1
cpu_platform = "Intel/Broadwell"
create_time = "2020-11-28T23:09:04+08:00"
disk_set = [
{
id = "31e2cad6-79a1-4475-a9f5-2c5c95605b18"
is_boot = true
size = 20
type = "local_normal"
},
]
expire_time = "2020-11-29T00:09:04+08:00"
id = "uhost-v3qxdbju"
image_id = "uimage-dhe5m2"
instance_type = "n-standard-1"
ip_set = [
{
internet_type = "Private"
ip = "10.9.85.40"
},
]
memory = 4
name = "cn-bj2-04-1"
private_ip = "10.9.85.40"
root_password = (sensitive value)
security_group = "firewall-juhsrlvr"
status = "Running"
subnet_id = "subnet-dtu3dgpr"
tag = "Default"
vpc_id = "uvnet-f1c3jq2b"
}
# ucloud_instance.web[0]:
resource "ucloud_instance" "web" {
auto_renew = true
availability_zone = "cn-bj2-03"
boot_disk_size = 20
boot_disk_type = "local_normal"
charge_type = "dynamic"
cpu = 1
cpu_platform = "Intel/IvyBridge"
create_time = "2020-11-28T23:09:04+08:00"
disk_set = [
{
id = "da27595d-9645-4883-bf95-87b9076ab7e4"
is_boot = true
size = 20
type = "local_normal"
},
]
expire_time = "2020-11-29T00:09:04+08:00"
id = "uhost-scq1prqj"
image_id = "uimage-pxplaj"
instance_type = "n-standard-1"
ip_set = [
{
internet_type = "Private"
ip = "10.9.107.152"
},
]
memory = 4
name = "cn-bj2-03-0"
private_ip = "10.9.107.152"
root_password = (sensitive value)
security_group = "firewall-juhsrlvr"
status = "Running"
subnet_id = "subnet-dtu3dgpr"
tag = "Default"
vpc_id = "uvnet-f1c3jq2b"
}
可以看到，主机的确是均匀地分散在两个可用区了。
但是这样做在调整可用区时会发生大问题，例如：
variable "az" {
type = list(string)
default = [
"cn-bj2-03",
# "cn-bj2-04",
]
}
我们禁用了cn-bj2-04可用区，按道理我们期待的变更计划应该是将两台原本属于cn-bj2-04的主机删除，在cn-bj2-03可用区新增两台主机。让我们看看会发生什么：
$ terraform plan
Refreshing Terraform state in-memory prior to plan...
The refreshed state will be used to calculate this plan, but will not be
persisted to local or remote state storage.
data.ucloud_images.centos: Refreshing state... [id=475496684]
ucloud_instance.web[0]: Refreshing state... [id=uhost-scq1prqj]
ucloud_instance.web[3]: Refreshing state... [id=uhost-v3qxdbju]
ucloud_instance.web[2]: Refreshing state... [id=uhost-txa2owrp]
ucloud_instance.web[1]: Refreshing state... [id=uhost-td3x545p]
------------------------------------------------------------------------
An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
~ update in-place
-/+ destroy and then create replacement
Terraform will perform the following actions:
# ucloud_instance.web[1] must be replaced
-/+ resource "ucloud_instance" "web" {
~ auto_renew = true -> (known after apply)
~ availability_zone = "cn-bj2-04" -> "cn-bj2-03" # forces replacement
~ boot_disk_size = 20 -> (known after apply)
~ boot_disk_type = "local_normal" -> (known after apply)
charge_type = "dynamic"
~ cpu = 1 -> (known after apply)
~ cpu_platform = "Intel/Broadwell" -> (known after apply)
~ create_time = "2020-11-28T23:09:04+08:00" -> (known after apply)
+ data_disk_size = (known after apply)
+ data_disk_type = (known after apply)
~ disk_set = [
- {
- id = "df06380a-00e1-42df-8c07-eec67d817f97"
- is_boot = true
- size = 20
- type = "local_normal"
},
] -> (known after apply)
~ expire_time = "2020-11-29T00:09:06+08:00" -> (known after apply)
~ id = "uhost-td3x545p" -> (known after apply)
~ image_id = "uimage-dhe5m2" -> "uimage-rkn1v2"
instance_type = "n-standard-1"
~ ip_set = [
- {
- internet_type = "Private"
- ip = "10.9.44.37"
},
] -> (known after apply)
+ isolation_group = (known after apply)
~ memory = 4 -> (known after apply)
~ name = "cn-bj2-04-0" -> "cn-bj2-03-1"
~ private_ip = "10.9.44.37" -> (known after apply)
+ remark = (known after apply)
~ root_password = (sensitive value)
~ security_group = "firewall-juhsrlvr" -> (known after apply)
~ status = "Running" -> (known after apply)
~ subnet_id = "subnet-dtu3dgpr" -> (known after apply)
tag = "Default"
~ vpc_id = "uvnet-f1c3jq2b" -> (known after apply)
}
# ucloud_instance.web[2] will be updated in-place
~ resource "ucloud_instance" "web" {
auto_renew = true
availability_zone = "cn-bj2-03"
boot_disk_size = 20
boot_disk_type = "local_normal"
charge_type = "dynamic"
cpu = 1
cpu_platform = "Intel/IvyBridge"
create_time = "2020-11-28T23:09:01+08:00"
disk_set = [
{
id = "1d7f07c9-7342-431b-85bb-d3ee0022063d"
is_boot = true
size = 20
type = "local_normal"
},
]
expire_time = "2020-11-29T00:09:02+08:00"
id = "uhost-txa2owrp"
image_id = "uimage-pxplaj"
instance_type = "n-standard-1"
ip_set = [
{
internet_type = "Private"
ip = "10.9.45.234"
},
]
memory = 4
~ name = "cn-bj2-03-1" -> "cn-bj2-03-2"
private_ip = "10.9.45.234"
root_password = (sensitive value)
security_group = "firewall-juhsrlvr"
status = "Running"
subnet_id = "subnet-dtu3dgpr"
tag = "Default"
vpc_id = "uvnet-f1c3jq2b"
}
# ucloud_instance.web[3] must be replaced
-/+ resource "ucloud_instance" "web" {
~ auto_renew = true -> (known after apply)
~ availability_zone = "cn-bj2-04" -> "cn-bj2-03" # forces replacement
~ boot_disk_size = 20 -> (known after apply)
~ boot_disk_type = "local_normal" -> (known after apply)
charge_type = "dynamic"
~ cpu = 1 -> (known after apply)
~ cpu_platform = "Intel/Broadwell" -> (known after apply)
~ create_time = "2020-11-28T23:09:04+08:00" -> (known after apply)
+ data_disk_size = (known after apply)
+ data_disk_type = (known after apply)
~ disk_set = [
- {
- id = "31e2cad6-79a1-4475-a9f5-2c5c95605b18"
- is_boot = true
- size = 20
- type = "local_normal"
},
] -> (known after apply)
~ expire_time = "2020-11-29T00:09:04+08:00" -> (known after apply)
~ id = "uhost-v3qxdbju" -> (known after apply)
~ image_id = "uimage-dhe5m2" -> "uimage-rkn1v2"
instance_type = "n-standard-1"
~ ip_set = [
- {
- internet_type = "Private"
- ip = "10.9.85.40"
},
] -> (known after apply)
+ isolation_group = (known after apply)
~ memory = 4 -> (known after apply)
~ name = "cn-bj2-04-1" -> "cn-bj2-03-3"
~ private_ip = "10.9.85.40" -> (known after apply)
+ remark = (known after apply)
~ root_password = (sensitive value)
~ security_group = "firewall-juhsrlvr" -> (known after apply)
~ status = "Running" -> (known after apply)
~ subnet_id = "subnet-dtu3dgpr" -> (known after apply)
tag = "Default"
~ vpc_id = "uvnet-f1c3jq2b" -> (known after apply)
}
Plan: 2 to add, 1 to change, 2 to destroy.
------------------------------------------------------------------------
Note: You didn't specify an "-out" parameter to save this plan, so Terraform
can't guarantee that exactly these actions will be performed if
"terraform apply" is subsequently run.
变更计划与期望略有不同。我们仔细看细节：
# ucloud_instance.web[2] will be updated in-place
~ resource "ucloud_instance" "web" {
auto_renew = true
availability_zone = "cn-bj2-03"
boot_disk_size = 20
boot_disk_type = "local_normal"
charge_type = "dynamic"
cpu = 1
cpu_platform = "Intel/IvyBridge"
create_time = "2020-11-28T23:09:01+08:00"
disk_set = [
{
id = "1d7f07c9-7342-431b-85bb-d3ee0022063d"
is_boot = true
size = 20
type = "local_normal"
},
]
expire_time = "2020-11-29T00:09:02+08:00"
id = "uhost-txa2owrp"
image_id = "uimage-pxplaj"
instance_type = "n-standard-1"
ip_set = [
{
internet_type = "Private"
ip = "10.9.45.234"
},
]
memory = 4
~ name = "cn-bj2-03-1" -> "cn-bj2-03-2"
private_ip = "10.9.45.234"
root_password = (sensitive value)
security_group = "firewall-juhsrlvr"
status = "Running"
subnet_id = "subnet-dtu3dgpr"
tag = "Default"
vpc_id = "uvnet-f1c3jq2b"
}
原本名为cn-bj2-03-1的主机被更名为cn-bj2-03-2了，原本属于cn-bj2-04的第一台主机的变更计划是：
# ucloud_instance.web[1] must be replaced
-/+ resource "ucloud_instance" "web" {
~ auto_renew = true -> (known after apply)
~ availability_zone = "cn-bj2-04" -> "cn-bj2-03" # forces replacement
~ boot_disk_size = 20 -> (known after apply)
~ boot_disk_type = "local_normal" -> (known after apply)
charge_type = "dynamic"
~ cpu = 1 -> (known after apply)
~ cpu_platform = "Intel/Broadwell" -> (known after apply)
~ create_time = "2020-11-28T23:09:04+08:00" -> (known after apply)
+ data_disk_size = (known after apply)
+ data_disk_type = (known after apply)
~ disk_set = [
- {
- id = "df06380a-00e1-42df-8c07-eec67d817f97"
- is_boot = true
- size = 20
- type = "local_normal"
},
] -> (known after apply)
~ expire_time = "2020-11-29T00:09:06+08:00" -> (known after apply)
~ id = "uhost-td3x545p" -> (known after apply)
~ image_id = "uimage-dhe5m2" -> "uimage-rkn1v2"
instance_type = "n-standard-1"
~ ip_set = [
- {
- internet_type = "Private"
- ip = "10.9.44.37"
},
] -> (known after apply)
+ isolation_group = (known after apply)
~ memory = 4 -> (known after apply)
~ name = "cn-bj2-04-0" -> "cn-bj2-03-1"
~ private_ip = "10.9.44.37" -> (known after apply)
+ remark = (known after apply)
~ root_password = (sensitive value)
~ security_group = "firewall-juhsrlvr" -> (known after apply)
~ status = "Running" -> (known after apply)
~ subnet_id = "subnet-dtu3dgpr" -> (known after apply)
tag = "Default"
~ vpc_id = "uvnet-f1c3jq2b" -> (known after apply)
}
它的名字从cn-bj2-04-0变成了cn-bj2-03-1。
仔细想想，实际上这是一个比较低效的变更计划。原本属于cn-bj2-03的两台主机应该不做任何变更，只需要删除cn-bj2-04的主机，再补充两台cn-bj2-03的主机即可。这是因为我们使用的是count，而count只看元素在列表中的序号。当我们删除一个可用区时，实际上会引起主机序号的重大变化，导致出现大量低效的变更，这就是我们在讲count与for_each时强调过的，如果创建的资源实例彼此之间几乎完全一致，那么count比较合适。否则，那么使用for_each会更加安全。
让我们尝试使用for_each改写这段逻辑：
variable "az" {
type = list(string)
default = [
"cn-bj2-03",
"cn-bj2-04",
]
}
variable "instance_count" {
type = number
default = 4
}
locals {
instance_names = [for i in range(var.instance_count):"${var.az[i%length(var.az)]}-${floor(i/length(var.az))}"]
}
data "ucloud_images" "centos" {
name_regex = "^CentOS 7"
}
resource "ucloud_instance" "web" {
for_each = toset(local.instance_names)
name = each.value
availability_zone = var.az[index(local.instance_names, each.value) % length(var.az)]
image_id = data.ucloud_images.centos.images[0].id
instance_type = "n-standard-1"
charge_type = "dynamic"
}
为了生成主机独一无二的名字，我们首先用range函数生成了一个序号集合，比如目标主机数是4，那么range(4)的结果就是[0, 1, 2, 3]；然后我们通过取模运算使得名字前缀在可用区列表之间循环递增，最后用floor(i/length(var.az))计算出当前序号对应在当前可用区是第几台。例如4号主机在第二个可用区就是第二台，生成的名字应该就是cn-bj-04-1。
执行结果是：
$ terraform apply -auto-approve
data.ucloud_images.centos: Refreshing state...
ucloud_instance.web["cn-bj2-03-1"]: Creating...
ucloud_instance.web["cn-bj2-03-0"]: Creating...
ucloud_instance.web["cn-bj2-04-0"]: Creating...
ucloud_instance.web["cn-bj2-04-1"]: Creating...
ucloud_instance.web["cn-bj2-03-1"]: Still creating... [10s elapsed]
ucloud_instance.web["cn-bj2-03-0"]: Still creating... [10s elapsed]
ucloud_instance.web["cn-bj2-04-0"]: Still creating... [10s elapsed]
ucloud_instance.web["cn-bj2-04-1"]: Still creating... [10s elapsed]
ucloud_instance.web["cn-bj2-03-1"]: Still creating... [20s elapsed]
ucloud_instance.web["cn-bj2-03-0"]: Still creating... [20s elapsed]
ucloud_instance.web["cn-bj2-04-0"]: Still creating... [20s elapsed]
ucloud_instance.web["cn-bj2-04-1"]: Still creating... [20s elapsed]
ucloud_instance.web["cn-bj2-04-1"]: Creation complete after 21s [id=uhost-fjci1i4o]
ucloud_instance.web["cn-bj2-04-0"]: Creation complete after 23s [id=uhost-bkkhmref]
ucloud_instance.web["cn-bj2-03-1"]: Creation complete after 26s [id=uhost-amosgdaa]
ucloud_instance.web["cn-bj2-03-0"]: Still creating... [30s elapsed]
ucloud_instance.web["cn-bj2-03-0"]: Still creating... [40s elapsed]
ucloud_instance.web["cn-bj2-03-0"]: Creation complete after 45s [id=uhost-kltudgnf]
Apply complete! Resources: 4 added, 0 changed, 0 destroyed.
如果我们去掉一个可用区：
variable "az" {
type = list(string)
default = [
"cn-bj2-03",
# "cn-bj2-04",
]
}
我们可以检查一下执行计划：
$ terraform plan
Refreshing Terraform state in-memory prior to plan...
The refreshed state will be used to calculate this plan, but will not be
persisted to local or remote state storage.
data.ucloud_images.centos: Refreshing state... [id=475496684]
ucloud_instance.web["cn-bj2-03-1"]: Refreshing state... [id=uhost-amosgdaa]
ucloud_instance.web["cn-bj2-04-0"]: Refreshing state... [id=uhost-bkkhmref]
ucloud_instance.web["cn-bj2-03-0"]: Refreshing state... [id=uhost-kltudgnf]
ucloud_instance.web["cn-bj2-04-1"]: Refreshing state... [id=uhost-fjci1i4o]
------------------------------------------------------------------------
An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
+ create
- destroy
Terraform will perform the following actions:
# ucloud_instance.web["cn-bj2-03-2"] will be created
+ resource "ucloud_instance" "web" {
+ auto_renew = (known after apply)
+ availability_zone = "cn-bj2-03"
+ boot_disk_size = (known after apply)
+ boot_disk_type = (known after apply)
+ charge_type = "dynamic"
+ cpu = (known after apply)
+ cpu_platform = (known after apply)
+ create_time = (known after apply)
+ data_disk_size = (known after apply)
+ data_disk_type = (known after apply)
+ disk_set = (known after apply)
+ expire_time = (known after apply)
+ id = (known after apply)
+ image_id = "uimage-rkn1v2"
+ instance_type = "n-standard-1"
+ ip_set = (known after apply)
+ isolation_group = (known after apply)
+ memory = (known after apply)
+ name = "cn-bj2-03-2"
+ private_ip = (known after apply)
+ remark = (known after apply)
+ root_password = (sensitive value)
+ security_group = (known after apply)
+ status = (known after apply)
+ subnet_id = (known after apply)
+ tag = "Default"
+ vpc_id = (known after apply)
}
# ucloud_instance.web["cn-bj2-03-3"] will be created
+ resource "ucloud_instance" "web" {
+ auto_renew = (known after apply)
+ availability_zone = "cn-bj2-03"
+ boot_disk_size = (known after apply)
+ boot_disk_type = (known after apply)
+ charge_type = "dynamic"
+ cpu = (known after apply)
+ cpu_platform = (known after apply)
+ create_time = (known after apply)
+ data_disk_size = (known after apply)
+ data_disk_type = (known after apply)
+ disk_set = (known after apply)
+ expire_time = (known after apply)
+ id = (known after apply)
+ image_id = "uimage-rkn1v2"
+ instance_type = "n-standard-1"
+ ip_set = (known after apply)
+ isolation_group = (known after apply)
+ memory = (known after apply)
+ name = "cn-bj2-03-3"
+ private_ip = (known after apply)
+ remark = (known after apply)
+ root_password = (sensitive value)
+ security_group = (known after apply)
+ status = (known after apply)
+ subnet_id = (known after apply)
+ tag = "Default"
+ vpc_id = (known after apply)
}
# ucloud_instance.web["cn-bj2-04-0"] will be destroyed
- resource "ucloud_instance" "web" {
- auto_renew = true -> null
- availability_zone = "cn-bj2-04" -> null
- boot_disk_size = 20 -> null
- boot_disk_type = "local_normal" -> null
- charge_type = "dynamic" -> null
- cpu = 1 -> null
- cpu_platform = "Intel/Broadwell" -> null
- create_time = "2020-11-28T22:35:53+08:00" -> null
- disk_set = [
- {
- id = "b214d840-ffec-4958-a3da-3580846fd2a3"
- is_boot = true
- size = 20
- type = "local_normal"
},
] -> null
- expire_time = "2020-11-28T23:35:53+08:00" -> null
- id = "uhost-bkkhmref" -> null
- image_id = "uimage-dhe5m2" -> null
- instance_type = "n-standard-1" -> null
- ip_set = [
- {
- internet_type = "Private"
- ip = "10.9.48.82"
},
] -> null
- memory = 4 -> null
- name = "cn-bj2-04-0" -> null
- private_ip = "10.9.48.82" -> null
- root_password = (sensitive value)
- security_group = "firewall-juhsrlvr" -> null
- status = "Running" -> null
- subnet_id = "subnet-dtu3dgpr" -> null
- tag = "Default" -> null
- vpc_id = "uvnet-f1c3jq2b" -> null
}
# ucloud_instance.web["cn-bj2-04-1"] will be destroyed
- resource "ucloud_instance" "web" {
- auto_renew = true -> null
- availability_zone = "cn-bj2-04" -> null
- boot_disk_size = 20 -> null
- boot_disk_type = "local_normal" -> null
- charge_type = "dynamic" -> null
- cpu = 1 -> null
- cpu_platform = "Intel/Broadwell" -> null
- create_time = "2020-11-28T22:35:53+08:00" -> null
- disk_set = [
- {
- id = "6a3f274f-e072-4a46-90f8-edc7dbaa27f7"
- is_boot = true
- size = 20
- type = "local_normal"
},
] -> null
- expire_time = "2020-11-28T23:35:53+08:00" -> null
- id = "uhost-fjci1i4o" -> null
- image_id = "uimage-dhe5m2" -> null
- instance_type = "n-standard-1" -> null
- ip_set = [
- {
- internet_type = "Private"
- ip = "10.9.176.28"
},
] -> null
- memory = 4 -> null
- name = "cn-bj2-04-1" -> null
- private_ip = "10.9.176.28" -> null
- root_password = (sensitive value)
- security_group = "firewall-juhsrlvr" -> null
- status = "Running" -> null
- subnet_id = "subnet-dtu3dgpr" -> null
- tag = "Default" -> null
- vpc_id = "uvnet-f1c3jq2b" -> null
}
Plan: 2 to add, 0 to change, 2 to destroy.
------------------------------------------------------------------------
Note: You didn't specify an "-out" parameter to save this plan, so Terraform
can't guarantee that exactly these actions will be performed if
"terraform apply" is subsequently run.
可以看到，原来属于cn-bj2-03的两台主机原封不动，删除了属于cn-bj2-04的两台主机，并且在cn-bj2-03可用区新增两台主机。