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-rw-r--r--yandex/server/etc/cloud-init.cfg13
-rw-r--r--yandex/server/etc/sshd_config39
-rw-r--r--yandex/server/main.tf41
-rw-r--r--yandex/server/providers.tf7
-rw-r--r--yandex/server/variables.tf46
5 files changed, 146 insertions, 0 deletions
diff --git a/yandex/server/etc/cloud-init.cfg b/yandex/server/etc/cloud-init.cfg
new file mode 100644
index 0000000..8ed371c
--- /dev/null
+++ b/yandex/server/etc/cloud-init.cfg
@@ -0,0 +1,13 @@
+#cloud-config
+
+users:
+ - name: ${jsonencode(user)}
+ lock_passwd: false
+ hashed_passwd: '*'
+ sudo: ALL=(ALL) NOPASSWD:ALL
+ ssh_authorized_keys: ${jsonencode(ssh_keys)}
+ shell: /bin/bash
+
+write_files:
+ - path: /etc/ssh/sshd_config
+ content: ${jsonencode(sshd_config)}
diff --git a/yandex/server/etc/sshd_config b/yandex/server/etc/sshd_config
new file mode 100644
index 0000000..ae08408
--- /dev/null
+++ b/yandex/server/etc/sshd_config
@@ -0,0 +1,39 @@
+Protocol 2
+Port ${port}
+
+# Drop idle sessions:
+ClientAliveCountMax 3
+ClientAliveInterval 15
+
+# Allow reverse tunnels:
+GatewayPorts yes
+
+# Miscellaneous:
+PrintMotd no
+
+# Hardening.
+# Source: https://infosec.mozilla.org/guidelines/openssh.html
+
+# Only Ed25519:
+HostKey /etc/ssh/ssh_host_ed25519_key
+
+# Only the first choices for ciphers:
+KexAlgorithms curve25519-sha256@libssh.org
+Ciphers chacha20-poly1305@openssh.com
+MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com
+
+# No password login:
+PasswordAuthentication no
+AuthenticationMethods publickey
+# Whitelist users:
+PermitRootLogin no
+AllowGroups ${join(" ", users)}
+
+# Log things:
+Subsystem sftp /usr/lib/openssh/sftp-server -f AUTHPRIV -l INFO
+
+# Whitelist accepted environment variables:
+AcceptEnv LANG LC_*
+
+# Why the fuck would I need X11 forwarding?
+X11Forwarding no
diff --git a/yandex/server/main.tf b/yandex/server/main.tf
new file mode 100644
index 0000000..12d31d9
--- /dev/null
+++ b/yandex/server/main.tf
@@ -0,0 +1,41 @@
+locals {
+ sshd_config = templatefile("${path.module}/etc/sshd_config", {
+ port = var.ssh_port
+ users = [var.user]
+ })
+}
+
+resource "yandex_compute_instance" "this" {
+ zone = var.zone
+ name = var.name
+ hostname = var.name
+
+ resources {
+ cores = var.cores
+ core_fraction = var.core_fraction
+ memory = var.memory
+ }
+
+ boot_disk {
+ initialize_params {
+ size = var.disk_size
+ image_id = var.image
+ }
+ }
+
+ network_interface {
+ subnet_id = var.subnet_id
+ nat = true
+ nat_ip_address = var.ip_address
+ }
+
+ metadata = {
+ user-data = templatefile("${path.module}/etc/cloud-init.cfg", {
+ user = var.user
+ ssh_keys = var.ssh_keys
+ sshd_config = local.sshd_config
+ })
+ }
+
+ allow_stopping_for_update = true
+}
diff --git a/yandex/server/providers.tf b/yandex/server/providers.tf
new file mode 100644
index 0000000..3a5782f
--- /dev/null
+++ b/yandex/server/providers.tf
@@ -0,0 +1,7 @@
+terraform {
+ required_providers {
+ yandex = {
+ source = "yandex-cloud/yandex"
+ }
+ }
+}
diff --git a/yandex/server/variables.tf b/yandex/server/variables.tf
new file mode 100644
index 0000000..0fca4cb
--- /dev/null
+++ b/yandex/server/variables.tf
@@ -0,0 +1,46 @@
+variable "zone" {
+ type = string
+}
+
+variable "name" {
+ type = string
+}
+variable "image" {
+ type = string
+ # Debian 11
+ default = "fd8sqojvm458b3jr5nfd"
+}
+variable "subnet_id" {
+ type = string
+}
+variable "ip_address" {
+ type = string
+}
+
+variable "user" {
+ type = string
+}
+variable "ssh_keys" {
+ type = list(string)
+}
+variable "ssh_port" {
+ type = string
+ default = "22"
+}
+
+variable "cores" {
+ type = number
+ default = 2
+}
+variable "core_fraction" {
+ type = number
+ default = 100
+}
+variable "memory" {
+ type = number
+ default = 2
+}
+variable "disk_size" {
+ type = number
+ default = 10
+}