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From 836be9931cad907dc71fc9e769d185e09a33e120 Mon Sep 17 00:00:00 2001
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From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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Date: Tue, 31 Jan 2023 17:14:42 +0100
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Subject: [PATCH] cc_set_hostname: ignore /var/lib/cloud/data/set-hostname if
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it's empty (#1967)
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RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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RH-MergeRequest: 90: cc_set_hostname: ignore /var/lib/cloud/data/set-hostname if it's empty (#1967)
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RH-Bugzilla: 2165945
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RH-Acked-by: Mohamed Gamal Morsy <mmorsy@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Commit: [1/1] 2efa7c1ac15932be38bd86b9b76f8f3b18038de6
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2165945
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commit 9c7502a801763520639c66125eb373123d1e4f44
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Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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Date: Wed Jan 18 17:55:16 2023 +0100
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cc_set_hostname: ignore /var/lib/cloud/data/set-hostname if it's empty (#1967)
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If the file exists but is empty, do nothing.
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Otherwise cloud-init will crash because it does not handle the empty file.
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RHBZ: 2140893
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Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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---
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cloudinit/config/cc_set_hostname.py | 2 +-
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tests/unittests/config/test_cc_set_hostname.py | 17 +++++++++++++++++
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2 files changed, 18 insertions(+), 1 deletion(-)
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diff --git a/cloudinit/config/cc_set_hostname.py b/cloudinit/config/cc_set_hostname.py
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index eb0ca328..9d78f6ad 100644
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--- a/cloudinit/config/cc_set_hostname.py
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+++ b/cloudinit/config/cc_set_hostname.py
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@@ -86,7 +86,7 @@ def handle(name, cfg, cloud, log, _args):
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# distro._read_hostname implementation so we only validate one artifact.
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prev_fn = os.path.join(cloud.get_cpath("data"), "set-hostname")
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prev_hostname = {}
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- if os.path.exists(prev_fn):
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+ if os.path.exists(prev_fn) and os.stat(prev_fn).st_size > 0:
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prev_hostname = util.load_json(util.load_file(prev_fn))
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hostname_changed = hostname != prev_hostname.get(
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"hostname"
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diff --git a/tests/unittests/config/test_cc_set_hostname.py b/tests/unittests/config/test_cc_set_hostname.py
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index fd994c4e..a819039b 100644
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--- a/tests/unittests/config/test_cc_set_hostname.py
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+++ b/tests/unittests/config/test_cc_set_hostname.py
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@@ -5,6 +5,7 @@ import os
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import shutil
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import tempfile
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from io import BytesIO
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+from pathlib import Path
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from unittest import mock
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from configobj import ConfigObj
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@@ -204,5 +205,21 @@ class TestHostname(t_help.FilesystemMockingTestCase):
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str(ctx_mgr.exception),
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)
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+ def test_ignore_empty_previous_artifact_file(self):
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+ cfg = {
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+ "hostname": "blah",
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+ "fqdn": "blah.blah.blah.yahoo.com",
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+ }
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+ distro = self._fetch_distro("debian")
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+ paths = helpers.Paths({"cloud_dir": self.tmp})
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+ ds = None
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+ cc = cloud.Cloud(ds, paths, {}, distro, None)
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+ self.patchUtils(self.tmp)
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+ prev_fn = Path(cc.get_cpath("data")) / "set-hostname"
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+ prev_fn.touch()
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+ cc_set_hostname.handle("cc_set_hostname", cfg, cc, LOG, [])
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+ contents = util.load_file("/etc/hostname")
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+ self.assertEqual("blah", contents.strip())
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+
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# vi: ts=4 expandtab
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--
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2.37.3
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