1 files changed, 15 insertions, 7 deletions
diff --git a/cloudinit/config/cc_ca_certs.py b/cloudinit/config/cc_ca_certs.py
index 910b78de..3c453d91 100644
--- a/cloudinit/config/cc_ca_certs.py
+++ b/cloudinit/config/cc_ca_certs.py
@@ -16,11 +16,16 @@ can be removed from the system with the configuration option
     certificates must be specified using valid yaml. in order to specify a
     multiline certificate, the yaml multiline list syntax must be used
 
+.. note::
+    For Alpine Linux the "remove-defaults" functionality works if the
+    ca-certificates package is installed but not if the
+    ca-certificates-bundle package is installed.
+
 **Internal name:** ``cc_ca_certs``
 
 **Module frequency:** per instance
 
-**Supported distros:** ubuntu, debian
+**Supported distros:** alpine, debian, ubuntu
 
 **Config keys**::
 
@@ -45,7 +50,7 @@ CA_CERT_CONFIG = "/etc/ca-certificates.conf"
 CA_CERT_SYSTEM_PATH = "/etc/ssl/certs/"
 CA_CERT_FULL_PATH = os.path.join(CA_CERT_PATH, CA_CERT_FILENAME)
 
-distros = ['ubuntu', 'debian']
+distros = ['alpine', 'debian', 'ubuntu']
 
 
 def update_ca_certs():
@@ -83,7 +88,7 @@ def add_ca_certs(certs):
         util.write_file(CA_CERT_CONFIG, out, omode="wb")
 
 
-def remove_default_ca_certs():
+def remove_default_ca_certs(distro_name):
     """
     Removes all default trusted CA certificates from the system. To actually
     apply the change you must also call L{update_ca_certs}.
@@ -91,11 +96,14 @@ def remove_default_ca_certs():
     util.delete_dir_contents(CA_CERT_PATH)
     util.delete_dir_contents(CA_CERT_SYSTEM_PATH)
     util.write_file(CA_CERT_CONFIG, "", mode=0o644)
-    debconf_sel = "ca-certificates ca-certificates/trust_new_crts select no"
-    subp.subp(('debconf-set-selections', '-'), debconf_sel)
+
+    if distro_name != 'alpine':
+        debconf_sel = (
+            "ca-certificates ca-certificates/trust_new_crts " + "select no")
+        subp.subp(('debconf-set-selections', '-'), debconf_sel)
 
 
-def handle(name, cfg, _cloud, log, _args):
+def handle(name, cfg, cloud, log, _args):
     """
     Call to handle ca-cert sections in cloud-config file.
 
@@ -117,7 +125,7 @@ def handle(name, cfg, _cloud, log, _args):
     # default trusted CA certs first.
     if ca_cert_cfg.get("remove-defaults", False):
         log.debug("Removing default certificates")
-        remove_default_ca_certs()
+        remove_default_ca_certs(cloud.distro.name)
 
     # If we are given any new trusted CA certs to add, add them.
     if "trusted" in ca_cert_cfg: