Add CentOS, AlmaLinux packer images

Author: gbraad

.github/workflows/build-diskimage-almalinux-packer.yml

@@ -0,0 +1,16 @@
+name: Build and Push AlmaLinux cloud diskimage
+
+on:
+  push:
+    branches:
+      - "main"
+  schedule:
+    - cron: "0 0 */2 * *"
+  workflow_dispatch:
+
+
+jobs:
+  build-diskimage-almalinux-packer:
+    uses: ./.github/workflows/reusable-build-diskimage-packer.yml
+    with:
+      container_name: almalinux-cloud

.github/workflows/build-diskimage-centos-packer.yml

@@ -0,0 +1,16 @@
+name: Build and Push CentOS cloud diskimage
+
+on:
+  push:
+    branches:
+      - "main"
+  schedule:
+    - cron: "0 0 */2 * *"
+  workflow_dispatch:
+
+
+jobs:
+  build-diskimage-centos-packer:
+    uses: ./.github/workflows/reusable-build-diskimage-packer.yml
+    with:
+      container_name: centos-cloud

.packer/almalinux-cloud/Containerfile-disk

@@ -0,0 +1,2 @@
+FROM scratch
+ADD ./output-almalinux/packer-almalinux /disk.qcow2

.packer/almalinux-cloud/Machinefile

@@ -0,0 +1 @@
+../../.devcontainer/almalinux/Containerfile

.packer/almalinux-cloud/cloud-init/meta-data

@@ -0,0 +1 @@
+#cloud-config

.packer/almalinux-cloud/cloud-init/user-data

@@ -0,0 +1,22 @@
+#cloud-config
+system_info:
+  default_user:
+    name: ""
+
+chpasswd:
+  list: |
+    root:password
+  expire: false
+
+ssh_pwauth: true
+
+network:
+  version: 2
+  ethernets:
+    "*":
+      dhcp4: true
+
+runcmd:
+  - echo "PermitRootLogin yes" > /etc/ssh/sshd_config.d/00-packer.conf
+  - echo "PasswordAuthentication yes" >> /etc/ssh/sshd_config.d/00-packer.conf
+  - systemctl restart sshd

.packer/almalinux-cloud/machine.pkr.hcl

@@ -0,0 +1,60 @@
+packer {
+  required_plugins {
+    qemu = {
+      version = ">= 1.0.0"
+      source  = "github.com/hashicorp/qemu"
+    }
+  }
+}
+
+source "qemu" "almalinux" {
+  accelerator       = "kvm"
+  disk_image        = true
+  iso_url           = "https://repo.almalinux.org/almalinux/9/cloud/x86_64/images/AlmaLinux-9-GenericCloud-9.6-20250522.x86_64.qcow2"
+  iso_checksum      = "sha256:b08cd5db79bf32860412f5837e8c7b8df9447e032376e3c622840b31aaf26bc6"
+  output_directory  = "output-almalinux"
+  format            = "qcow2"
+  memory            = 2048
+  disk_size         = "20480"
+  ssh_username      = "root"
+  ssh_password      = "password"
+  ssh_wait_timeout  = "30m"
+  net_device        = "virtio-net"
+  headless          = true
+
+  cd_files = [".packer/almalinux-cloud/cloud-init/user-data", ".packer/almalinux-cloud/cloud-init/meta-data"]
+  cd_label = "CIDATA"
+
+  shutdown_command  = "shutdown -P now"
+  shutdown_timeout  = "1m"
+
+  qemuargs         = [["-serial", "stdio"], ["-cpu", "host"]]
+}
+
+build {
+  name    = "almalinux"
+  sources = ["source.qemu.almalinux"]
+
+  provisioner "shell-local" {
+    script = ".packer/machinefile.sh"
+    environment_vars = [
+      "TARGET=almalinux-cloud",
+      "USER_PASSWD=password",
+      "SSH_HOST=${build.Host}",
+      "SSH_PORT=${build.Port}"]
+  }
+
+  # disable cloud-init
+  provisioner "shell" {
+    inline = [
+      "touch /etc/cloud/cloud-init.disabled"
+    ]
+  }
+
+  # disable root and password login
+  provisioner "shell" {
+    inline = [
+      "rm -f /etc/ssh/sshd_config.d/00-packer.conf"
+    ]
+  }
+}

.packer/centos-cloud/Containerfile-disk

@@ -0,0 +1,2 @@
+FROM scratch
+ADD ./output-centos/packer-centos /disk.qcow2

.packer/centos-cloud/Machinefile

@@ -0,0 +1 @@
+../../.devcontainer/centos/Containerfile

.packer/centos-cloud/cloud-init/meta-data

@@ -0,0 +1 @@
+#cloud-config