From 5ce1c5a0a1e59a4ee991aa7c3c909b44eced2cbb Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@newdream.net>
Date: Mon, 1 Mar 2021 17:42:15 -0500
Subject: [PATCH] cephadm: add docker.service dependency in systemd units

This ensures that (1) we start after the docker daemon is running, and
(2) a restart of docker will also restart the ceph services.

Fixes: https://tracker.ceph.com/issues/46745
Signed-off-by: Sage Weil <sage@newdream.net>
(cherry picked from commit 0b5bc8fc2e11f1ec84be96e7a2bdbb884e1d0de3)
---
 src/cephadm/cephadm               | 21 ++++++++++++++++-----
 src/cephadm/tests/test_cephadm.py |  9 +++++++++
 2 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/src/cephadm/cephadm b/src/cephadm/cephadm
index 8125461714f11..3a90939cf9192 100755
--- a/src/cephadm/cephadm
+++ b/src/cephadm/cephadm
@@ -2912,6 +2912,7 @@ def get_unit_file(ctx, fsid):
             'Type=forking\n'
             'PIDFile=/%t/%n-pid\n')
 
+    docker = 'docker' in ctx.container_path
     u = """# generated by cephadm
 [Unit]
 Description=Ceph %i for {fsid}
@@ -2920,8 +2921,9 @@ Description=Ceph %i for {fsid}
 #   http://www.freedesktop.org/wiki/Software/systemd/NetworkTarget
 # these can be removed once ceph-mon will dynamically change network
 # configuration.
-After=network-online.target local-fs.target time-sync.target
+After=network-online.target local-fs.target time-sync.target{docker_after}
 Wants=network-online.target local-fs.target time-sync.target
+{docker_requires}
 
 PartOf=ceph-{fsid}.target
 Before=ceph-{fsid}.target
@@ -2947,7 +2949,11 @@ WantedBy=ceph-{fsid}.target
     container_path=ctx.container_path,
     fsid=fsid,
     data_dir=ctx.data_dir,
-    extra_args=extra_args)
+    extra_args=extra_args,
+    # if docker, we depend on docker.service
+    docker_after=' docker.service' if docker else '',
+    docker_requires='Requires=docker.service\n' if docker else '',
+)
 
     return u
 
@@ -6951,11 +6957,13 @@ class CephadmDaemon():
 
     @property
     def unit_file(self):
+        docker = 'docker' in self.ctx.container_path
         return """#generated by cephadm
 [Unit]
 Description=cephadm exporter service for cluster {fsid}
-After=network-online.target
+After=network-online.target{docker_after}
 Wants=network-online.target
+{docker_requires}
 
 PartOf=ceph-{fsid}.target
 Before=ceph-{fsid}.target
@@ -6971,8 +6979,11 @@ RestartSec=10s
 WantedBy=ceph-{fsid}.target
 """.format(
         fsid=self.fsid,
-        daemon_path=self.daemon_path
-)
+        daemon_path=self.daemon_path,
+        # if docker, we depend on docker.service
+        docker_after=' docker.service' if docker else '',
+        docker_requires='Requires=docker.service\n' if docker else '',
+        )
 
     def deploy_daemon_unit(self, config=None):
         """deploy a specific unit file for cephadm
diff --git a/src/cephadm/tests/test_cephadm.py b/src/cephadm/tests/test_cephadm.py
index af10355878fe1..7b2c4db711dc9 100644
--- a/src/cephadm/tests/test_cephadm.py
+++ b/src/cephadm/tests/test_cephadm.py
@@ -23,6 +23,15 @@ with patch('builtins.open', create=True):
 
 class TestCephAdm(object):
 
+    def test_docker_unit_file(self):
+        ctx = mock.Mock()
+        ctx.container_path = '/usr/bin/docker'
+        r = cd.get_unit_file(ctx, '9b9d7609-f4d5-4aba-94c8-effa764d96c9')
+        assert 'Requires=docker.service' in r
+        ctx.container_path = '/usr/sbin/podman'
+        r = cd.get_unit_file(ctx, '9b9d7609-f4d5-4aba-94c8-effa764d96c9')
+        assert 'Requires=docker.service' not in r
+
     @mock.patch('cephadm.logger')
     def test_attempt_bind(self, logger):
         ctx = None
-- 
2.39.5