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From 00b8210223ce3af97109df5cdb85b8e40541dd33 Mon Sep 17 00:00:00 2001
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From: Eduardo Otubo <otubo@redhat.com>
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Date: Tue, 28 Apr 2020 08:22:07 +0200
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Subject: [PATCH 3/3] cc_mounts: fix incorrect format specifiers (#316)
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RH-Author: Eduardo Otubo <otubo@redhat.com>
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Message-id: <20200422130428.7663-4-otubo@redhat.com>
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Patchwork-id: 96034
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O-Subject: [RHEL-7.7.z/RHEL-7.8.z cloud-init PATCH 3/3] cc_mounts: fix incorrect format specifiers (#316)
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Bugzilla: 1801094
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RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
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RH-Acked-by: Cathy Avery <cavery@redhat.com>
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commit 9d7b35ce23aaf8741dd49b16e359c96591be3c76
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Author: Daniel Watkins <oddbloke@ubuntu.com>
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Date:   Wed Apr 15 16:53:08 2020 -0400
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    cc_mounts: fix incorrect format specifiers (#316)
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    LP: #1872836
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Signed-off-by: Eduardo Otubo <otubo@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 cloudinit/config/cc_mounts.py         |  6 +++---
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 cloudinit/config/tests/test_mounts.py | 22 ++++++++++++++++++++++
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 2 files changed, 25 insertions(+), 3 deletions(-)
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 create mode 100644 cloudinit/config/tests/test_mounts.py
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diff --git a/cloudinit/config/cc_mounts.py b/cloudinit/config/cc_mounts.py
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index 811781f..7c4e104 100644
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--- a/cloudinit/config/cc_mounts.py
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+++ b/cloudinit/config/cc_mounts.py
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@@ -226,17 +226,17 @@ def suggested_swapsize(memsize=None, maxsize=None, fsys=None):
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 def create_swapfile(fname, size):
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     """Size is in MiB."""
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-    errmsg = "Failed to create swapfile '%s' of size %dMB via %s: %s"
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+    errmsg = "Failed to create swapfile '%s' of size %sMB via %s: %s"
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     def create_swap(fname, size, method):
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         LOG.debug("Creating swapfile in '%s' on fstype '%s' using '%s'",
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                   fname, fstype, method)
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         if method == "fallocate":
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-            cmd = ['fallocate', '-l', '%dM' % size, fname]
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+            cmd = ['fallocate', '-l', '%sM' % size, fname]
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         elif method == "dd":
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             cmd = ['dd', 'if=/dev/zero', 'of=%s' % fname, 'bs=1M',
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-                   'count=%d' % size]
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+                   'count=%s' % size]
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         try:
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             util.subp(cmd, capture=True)
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diff --git a/cloudinit/config/tests/test_mounts.py b/cloudinit/config/tests/test_mounts.py
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new file mode 100644
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index 0000000..c7dad61
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--- /dev/null
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+++ b/cloudinit/config/tests/test_mounts.py
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@@ -0,0 +1,22 @@
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+# This file is part of cloud-init. See LICENSE file for license information.
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+from unittest import mock
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+
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+from cloudinit.config.cc_mounts import create_swapfile
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+
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+
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+M_PATH = 'cloudinit.config.cc_mounts.'
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+
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+
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+class TestCreateSwapfile:
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+
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+    @mock.patch(M_PATH + 'util.subp')
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+    def test_happy_path(self, m_subp, tmpdir):
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+        swap_file = tmpdir.join("swap-file")
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+        fname = str(swap_file)
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+
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+        # Some of the calls to util.subp should create the swap file; this
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+        # roughly approximates that
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+        m_subp.side_effect = lambda *args, **kwargs: swap_file.write('')
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+
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+        create_swapfile(fname, '')
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+        assert mock.call(['mkswap', fname]) in m_subp.call_args_list
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-- 
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1.8.3.1
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