Add Alpine Linux support. (#535)

Add new module cc_apk_configure for creating Alpine /etc/apk/repositories file.
Modify cc_ca_certs, cc_ntp, cc_power_state_change, and cc_resolv_conf for Alpine.
Add Alpine template files for Chrony and Busybox NTP support.
Add Alpine template file for /etc/hosts.

1 files changed, 18 insertions, 3 deletions

diff --git a/config/cloud.cfg.tmpl b/config/cloud.cfg.tmpl
index b44cbce7..2beb9b0c 100644
--- a/config/cloud.cfg.tmpl
+++ b/config/cloud.cfg.tmpl
@@ -21,7 +21,7 @@ disable_root: false
 disable_root: true
 {% endif %}
 
-{% if variant in ["amazon", "centos", "fedora", "rhel"] %}
+{% if variant in ["alpine", "amazon", "centos", "fedora", "rhel"] %}
 mount_default_fields: [~, ~, 'auto', 'defaults,nofail', '0', '2']
 {% if variant == "amazon" %}
 resize_rootfs: noblock
@@ -71,6 +71,9 @@ cloud_init_modules:
  - set_hostname
  - update_hostname
  - update_etc_hosts
+{% if variant in ["alpine"] %}
+ - resolv_conf
+{% endif %}
 {% if not variant.endswith("bsd") %}
  - ca-certs
  - rsyslog
@@ -104,6 +107,9 @@ cloud_config_modules:
 {% if variant in ["suse"] %}
  - zypper-add-repo
 {% endif %}
+{% if variant in ["alpine"] %}
+ - apk-configure
+{% endif %}
 {% if variant not in ["freebsd", "netbsd"] %}
  - ntp
 {% endif %}
@@ -145,7 +151,9 @@ cloud_final_modules:
 # (not accessible to handlers/transforms)
 system_info:
    # This will affect which distro class gets used
-{% if variant in ["amazon", "arch", "centos", "debian", "fedora", "freebsd", "netbsd", "openbsd", "rhel", "suse", "ubuntu"] %}
+{% if variant in ["alpine", "amazon", "arch", "centos", "debian",
+                  "fedora", "freebsd", "netbsd", "openbsd", "rhel",
+                  "suse", "ubuntu"] %}
    distro: {{ variant }}
 {% else %}
    # Unknown/fallback distro.
@@ -196,7 +204,8 @@ system_info:
          primary: http://ports.ubuntu.com/ubuntu-ports
          security: http://ports.ubuntu.com/ubuntu-ports
    ssh_svcname: ssh
-{% elif variant in ["amazon", "arch", "centos", "fedora", "rhel", "suse"] %}
+{% elif variant in ["alpine", "amazon", "arch", "centos", "fedora",
+                    "rhel", "suse"] %}
    # Default user name + that default users groups (if added/used)
    default_user:
 {% if variant == "amazon" %}
@@ -210,13 +219,19 @@ system_info:
 {% endif %}
 {% if variant == "suse" %}
      groups: [cdrom, users]
+{% elif variant == "alpine" %}
+     groups: [adm, sudo]
 {% elif variant == "arch" %}
      groups: [wheel, users]
 {% else %}
      groups: [wheel, adm, systemd-journal]
 {% endif %}
      sudo: ["ALL=(ALL) NOPASSWD:ALL"]
+{% if variant == "alpine" %}
+     shell: /bin/ash
+{% else %}
      shell: /bin/bash
+{% endif %}
    # Other config here will be given to the distro class and/or path classes
    paths:
       cloud_dir: /var/lib/cloud/