Terraform - 实践Docker
Create Terraform infrastructure with Docker
How to init/plan/apply/destroy an NGINX webserver with Terraform.
create .tf files.
terraform.tf
This file includes the terraform block, which defines the provider and Terraform versions you will use with this project.
terraform {
required_providers {
docker = {
source = "kreuzwerker/docker"
version = "~> 3.0.2"
}
}
required_version = "~> 1.7"
}
main.tf
provider "docker" {}
resource "docker_image" "nginx" {
name = "nginx:latest"
keep_locally = false
}
resource "docker_container" "nginx" {
image = docker_image.nginx.image_id
name = "tutorial"
ports {
internal = 80
external = 8000
}
}
init
In the terminal, run terraform init, initialize the project, which downloads a plugin that allows Terraform to interact with Docker.
root@workstation:~/learn-terraform-docker-container# terraform init
Initializing the backend...
Initializing provider plugins...
- Finding kreuzwerker/docker versions matching "~> 3.0.2"...
- Installing kreuzwerker/docker v3.0.2...
- Installed kreuzwerker/docker v3.0.2 (self-signed, key ID BD080C4571C6104C)
Partner and community providers are signed by their developers.
If you'd like to know more about provider signing, you can read about it here:
https://www.terraform.io/docs/cli/plugins/signing.html
Terraform has created a lock file .terraform.lock.hcl to record the provider
selections it made above. Include this file in your version control repository
so that Terraform can guarantee to make the same selections by default when
you run "terraform init" in the future.
Terraform has been successfully initialized!
You may now begin working with Terraform. Try running "terraform plan" to see
any changes that are required for your infrastructure. All Terraform commands
should now work.
If you ever set or change modules or backend configuration for Terraform,
rerun this command to reinitialize your working directory. If you forget, other
commands will detect it and remind you to do so if necessary.
root@workstation:~/learn-terraform-docker-container#
plan
root@workstation:~/learn-terraform-docker-container# terraform plan
Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the
following symbols:
+ create
Terraform will perform the following actions:
# docker_container.nginx will be created
+ resource "docker_container" "nginx" {
+ attach = false
+ bridge = (known after apply)
+ command = (known after apply)
+ container_logs = (known after apply)
+ container_read_refresh_timeout_milliseconds = 15000
+ entrypoint = (known after apply)
+ env = (known after apply)
+ exit_code = (known after apply)
+ hostname = (known after apply)
+ id = (known after apply)
+ image = (known after apply)
+ init = (known after apply)
+ ipc_mode = (known after apply)
+ log_driver = (known after apply)
+ logs = false
+ must_run = true
+ name = "tutorial"
+ network_data = (known after apply)
+ read_only = false
+ remove_volumes = true
+ restart = "no"
+ rm = false
+ runtime = (known after apply)
+ security_opts = (known after apply)
+ shm_size = (known after apply)
+ start = true
+ stdin_open = false
+ stop_signal = (known after apply)
+ stop_timeout = (known after apply)
+ tty = false
+ wait = false
+ wait_timeout = 60
+ ports {
+ external = 8000
+ internal = 80
+ ip = "0.0.0.0"
+ protocol = "tcp"
}
}
# docker_image.nginx will be created
+ resource "docker_image" "nginx" {
+ id = (known after apply)
+ image_id = (known after apply)
+ keep_locally = false
+ name = "nginx:latest"
+ repo_digest = (known after apply)
}
Plan: 2 to add, 0 to change, 0 to destroy.
───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
Note: You didn't use the -out option to save this plan, so Terraform can't guarantee to take exactly these actions if you
run "terraform apply" now.
root@workstation:~/learn-terraform-docker-container#
apply
Provision the NGINX server container with terraform apply. When Terraform asks you to confirm, type yes and press ENTER.
root@workstation:~/learn-terraform-docker-container# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
root@workstation:~/learn-terraform-docker-container#
root@workstation:~/learn-terraform-docker-container# terraform apply
Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the
following symbols:
+ create
Terraform will perform the following actions:
# docker_container.nginx will be created
+ resource "docker_container" "nginx" {
+ attach = false
+ bridge = (known after apply)
+ command = (known after apply)
+ container_logs = (known after apply)
+ container_read_refresh_timeout_milliseconds = 15000
+ entrypoint = (known after apply)
+ env = (known after apply)
+ exit_code = (known after apply)
+ hostname = (known after apply)
+ id = (known after apply)
+ image = (known after apply)
+ init = (known after apply)
+ ipc_mode = (known after apply)
+ log_driver = (known after apply)
+ logs = false
+ must_run = true
+ name = "tutorial"
+ network_data = (known after apply)
+ read_only = false
+ remove_volumes = true
+ restart = "no"
+ rm = false
+ runtime = (known after apply)
+ security_opts = (known after apply)
+ shm_size = (known after apply)
+ start = true
+ stdin_open = false
+ stop_signal = (known after apply)
+ stop_timeout = (known after apply)
+ tty = false
+ wait = false
+ wait_timeout = 60
+ ports {
+ external = 8000
+ internal = 80
+ ip = "0.0.0.0"
+ protocol = "tcp"
}
}
# docker_image.nginx will be created
+ resource "docker_image" "nginx" {
+ id = (known after apply)
+ image_id = (known after apply)
+ keep_locally = false
+ name = "nginx:latest"
+ repo_digest = (known after apply)
}
Plan: 2 to add, 0 to change, 0 to destroy.
Do you want to perform these actions?
Terraform will perform the actions described above.
Only 'yes' will be accepted to approve.
Enter a value: yes
docker_image.nginx: Creating...
docker_image.nginx: Creation complete after 7s [id=sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03cnginx:latest]
docker_container.nginx: Creating...
docker_container.nginx: Creation complete after 1s [id=f3c0efbe5dca772e4b5d16b7439ebf9b288d6c65ed263daeeb29d5bed13eb626]
Apply complete! Resources: 2 added, 0 changed, 0 destroyed.
root@workstation:~/learn-terraform-docker-container#
verify
Run docker ps to view the NGINX container running in Docker via Terraform.
root@workstation:~/learn-terraform-docker-container# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f3c0efbe5dca 5ef79149e0ec "/docker-entrypoint.…" About a minute ago Up About a minute 0.0.0.0:8000->80/tcp tutorial
root@workstation:~/learn-terraform-docker-container#
Check infos
root@workstation:~/learn-terraform-docker-container# terraform show
# docker_container.nginx:
resource "docker_container" "nginx" {
attach = false
command = [
"nginx",
"-g",
"daemon off;",
]
container_read_refresh_timeout_milliseconds = 15000
cpu_shares = 0
entrypoint = [
"/docker-entrypoint.sh",
]
env = []
hostname = "f3c0efbe5dca"
id = "f3c0efbe5dca772e4b5d16b7439ebf9b288d6c65ed263daeeb29d5bed13eb626"
image = "sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03c"
init = false
ipc_mode = "private"
log_driver = "json-file"
logs = false
max_retry_count = 0
memory = 0
memory_swap = 0
must_run = true
name = "tutorial"
network_data = [
{
gateway = "172.17.0.1"
global_ipv6_address = ""
global_ipv6_prefix_length = 0
ip_address = "172.17.0.2"
ip_prefix_length = 16
ipv6_gateway = ""
mac_address = "02:42:ac:11:00:02"
network_name = "bridge"
},
]
network_mode = "default"
privileged = false
publish_all_ports = false
read_only = false
remove_volumes = true
restart = "no"
rm = false
runtime = "runc"
security_opts = []
shm_size = 64
start = true
stdin_open = false
stop_signal = "SIGQUIT"
stop_timeout = 0
tty = false
wait = false
wait_timeout = 60
ports {
external = 8000
internal = 80
ip = "0.0.0.0"
protocol = "tcp"
}
}
# docker_image.nginx:
resource "docker_image" "nginx" {
id = "sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03cnginx:latest"
image_id = "sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03c"
keep_locally = false
name = "nginx:latest"
repo_digest = "nginx@sha256:447a8665cc1dab95b1ca778e162215839ccbb9189104c79d7ec3a81e14577add"
}
root@workstation:~/learn-terraform-docker-container#
root@workstation:~/learn-terraform-docker-container# terraform state list
docker_container.nginx
docker_image.nginx
root@workstation:~/learn-terraform-docker-container#
root@workstation:~/learn-terraform-docker-container# ll -a
total 32
drwxr-xr-x 3 root root 4096 Aug 23 14:50 ./
drwx------ 7 root root 4096 Aug 23 14:48 ../
drwxr-xr-x 3 root root 4096 Aug 23 14:48 .terraform/
-rw-r--r-- 1 root root 1337 Aug 23 14:48 .terraform.lock.hcl
-rw-r--r-- 1 root root 278 Aug 23 14:48 main.tf
-rw-r--r-- 1 root root 156 Aug 23 14:25 terraform.tf
-rw-r--r-- 1 root root 4426 Aug 23 14:50 terraform.tfstate
root@workstation:~/learn-terraform-docker-container#
root@workstation:~/learn-terraform-docker-container# cat terraform.tfstate
{
"version": 4,
"terraform_version": "1.7.0",
"serial": 3,
"lineage": "efcc65fb-a03d-7c04-7e7c-c8f138b551c8",
"outputs": {},
"resources": [
{
"mode": "managed",
"type": "docker_container",
"name": "nginx",
"provider": "provider[\"registry.terraform.io/kreuzwerker/docker\"]",
"instances": [
{
"schema_version": 2,
"attributes": {
"attach": false,
"bridge": "",
"capabilities": [],
"cgroupns_mode": null,
"command": [
"nginx",
"-g",
"daemon off;"
],
"container_logs": null,
"container_read_refresh_timeout_milliseconds": 15000,
"cpu_set": "",
"cpu_shares": 0,
"destroy_grace_seconds": null,
"devices": [],
"dns": null,
"dns_opts": null,
"dns_search": null,
"domainname": "",
"entrypoint": [
"/docker-entrypoint.sh"
],
"env": [],
"exit_code": null,
"gpus": null,
"group_add": null,
"healthcheck": null,
"host": [],
"hostname": "f3c0efbe5dca",
"id": "f3c0efbe5dca772e4b5d16b7439ebf9b288d6c65ed263daeeb29d5bed13eb626",
"image": "sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03c",
"init": false,
"ipc_mode": "private",
"labels": [],
"log_driver": "json-file",
"log_opts": null,
"logs": false,
"max_retry_count": 0,
"memory": 0,
"memory_swap": 0,
"mounts": [],
"must_run": true,
"name": "tutorial",
"network_data": [
{
"gateway": "172.17.0.1",
"global_ipv6_address": "",
"global_ipv6_prefix_length": 0,
"ip_address": "172.17.0.2",
"ip_prefix_length": 16,
"ipv6_gateway": "",
"mac_address": "02:42:ac:11:00:02",
"network_name": "bridge"
}
],
"network_mode": "default",
"networks_advanced": [],
"pid_mode": "",
"ports": [
{
"external": 8000,
"internal": 80,
"ip": "0.0.0.0",
"protocol": "tcp"
}
],
"privileged": false,
"publish_all_ports": false,
"read_only": false,
"remove_volumes": true,
"restart": "no",
"rm": false,
"runtime": "runc",
"security_opts": [],
"shm_size": 64,
"start": true,
"stdin_open": false,
"stop_signal": "SIGQUIT",
"stop_timeout": 0,
"storage_opts": null,
"sysctls": null,
"tmpfs": null,
"tty": false,
"ulimit": [],
"upload": [],
"user": "",
"userns_mode": "",
"volumes": [],
"wait": false,
"wait_timeout": 60,
"working_dir": ""
},
"sensitive_attributes": [],
"private": "eyJzY2hlbWFfdmVyc2lvbiI6IjIifQ==",
"dependencies": [
"docker_image.nginx"
]
}
]
},
{
"mode": "managed",
"type": "docker_image",
"name": "nginx",
"provider": "provider[\"registry.terraform.io/kreuzwerker/docker\"]",
"instances": [
{
"schema_version": 0,
"attributes": {
"build": [],
"force_remove": null,
"id": "sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03cnginx:latest",
"image_id": "sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03c",
"keep_locally": false,
"name": "nginx:latest",
"platform": null,
"pull_triggers": null,
"repo_digest": "nginx@sha256:447a8665cc1dab95b1ca778e162215839ccbb9189104c79d7ec3a81e14577add",
"triggers": null
},
"sensitive_attributes": [],
"private": "bnVsbA=="
}
]
}
],
"check_results": null
}
root@workstation:~/learn-terraform-docker-container#
destroy
To stop the container and destroy the resources created in this tutorial, run terraform destroy. When Terraform asks you to confirm, type yes and press ENTER.
root@workstation:~/learn-terraform-docker-container# terraform destroy
docker_image.nginx: Refreshing state... [id=sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03cnginx:latest]
docker_container.nginx: Refreshing state... [id=f3c0efbe5dca772e4b5d16b7439ebf9b288d6c65ed263daeeb29d5bed13eb626]
Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the
following symbols:
- destroy
Terraform will perform the following actions:
# docker_container.nginx will be destroyed
- resource "docker_container" "nginx" {
- attach = false -> null
- command = [
- "nginx",
- "-g",
- "daemon off;",
] -> null
- container_read_refresh_timeout_milliseconds = 15000 -> null
- cpu_shares = 0 -> null
- dns = [] -> null
- dns_opts = [] -> null
- dns_search = [] -> null
- entrypoint = [
- "/docker-entrypoint.sh",
] -> null
- env = [] -> null
- group_add = [] -> null
- hostname = "f3c0efbe5dca" -> null
- id = "f3c0efbe5dca772e4b5d16b7439ebf9b288d6c65ed263daeeb29d5bed13eb626" -> null
- image = "sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03c" -> null
- init = false -> null
- ipc_mode = "private" -> null
- log_driver = "json-file" -> null
- log_opts = {} -> null
- logs = false -> null
- max_retry_count = 0 -> null
- memory = 0 -> null
- memory_swap = 0 -> null
- must_run = true -> null
- name = "tutorial" -> null
- network_data = [
- {
- gateway = "172.17.0.1"
- global_ipv6_address = ""
- global_ipv6_prefix_length = 0
- ip_address = "172.17.0.2"
- ip_prefix_length = 16
- ipv6_gateway = ""
- mac_address = "02:42:ac:11:00:02"
- network_name = "bridge"
},
] -> null
- network_mode = "default" -> null
- privileged = false -> null
- publish_all_ports = false -> null
- read_only = false -> null
- remove_volumes = true -> null
- restart = "no" -> null
- rm = false -> null
- runtime = "runc" -> null
- security_opts = [] -> null
- shm_size = 64 -> null
- start = true -> null
- stdin_open = false -> null
- stop_signal = "SIGQUIT" -> null
- stop_timeout = 0 -> null
- storage_opts = {} -> null
- sysctls = {} -> null
- tmpfs = {} -> null
- tty = false -> null
- wait = false -> null
- wait_timeout = 60 -> null
- ports {
- external = 8000 -> null
- internal = 80 -> null
- ip = "0.0.0.0" -> null
- protocol = "tcp" -> null
}
}
# docker_image.nginx will be destroyed
- resource "docker_image" "nginx" {
- id = "sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03cnginx:latest" -> null
- image_id = "sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03c" -> null
- keep_locally = false -> null
- name = "nginx:latest" -> null
- repo_digest = "nginx@sha256:447a8665cc1dab95b1ca778e162215839ccbb9189104c79d7ec3a81e14577add" -> null
}
Plan: 0 to add, 0 to change, 2 to destroy.
Do you really want to destroy all resources?
Terraform will destroy all your managed infrastructure, as shown above.
There is no undo. Only 'yes' will be accepted to confirm.
Enter a value: yes
docker_container.nginx: Destroying... [id=f3c0efbe5dca772e4b5d16b7439ebf9b288d6c65ed263daeeb29d5bed13eb626]
docker_container.nginx: Destruction complete after 0s
docker_image.nginx: Destroying... [id=sha256:5ef79149e0ec84a7a9f9284c3f91aa3c20608f8391f5445eabe92ef07dbda03cnginx:latest]
docker_image.nginx: Destruction complete after 0s
Destroy complete! Resources: 2 destroyed.
root@workstation:~/learn-terraform-docker-container#
root@workstation:~/learn-terraform-docker-container# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
行动是绝望的解药！
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以所舍，求所得，有所获，方所成。
