File make-minion-reconnecting-on-changing-master-ip-... of Package salt

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File make-minion-reconnecting-on-changing-master-ip-bsc-1.patch of Package salt (Revision 11dcc79592c78b59795bb81f26cf7e22)

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From eb6c67e6f535cdfbf685a54c6352018673e37a12 Mon Sep 17 00:00:00 2001
From: Victor Zhestkov <vzhestkov@suse.com>
Date: Tue, 26 Nov 2024 11:59:08 +0300
Subject: [PATCH] Make minion reconnecting on changing master IP
 (bsc#1228182)

* Minions check dns when re-connecting to a master

Check for a chainging dns record anytime a minion gets disconnected from
it's master. See github issue #63654 #61482.

* Regression tests for dns defined masters

Adding tests to validate we check for changing dns anytime we're
disconnected from the currently connected master

* Update docs for master dns changes

Update docs to use master_alive_interval to detect master ip changes via
DNS.

* Remove comment which is not true anymore

* Make minion reconnecting on changing master IP

with zeromq transport

* Don't create schedule for alive if no master_alive_interval

* Skip the tests if running with non-root user

* Skip if unable to set additional IP address

* Set master_tries to -1 for minions

* Fix the tests

---------

Co-authored-by: Daniel A. Wozniak <daniel.wozniak@broadcom.com>
---
 conf/minion                                   |   5 +-
 doc/ref/configuration/minion.rst              |   4 +-
 salt/channel/client.py                        |   2 -
 salt/config/__init__.py                       |   4 +-
 salt/minion.py                                | 190 ++++++++----------
 salt/transport/zeromq.py                      |  17 +-
 tests/pytests/scenarios/dns/__init__.py       |   0
 tests/pytests/scenarios/dns/conftest.py       |  99 +++++++++
 .../scenarios/dns/multimaster/conftest.py     | 124 ++++++++++++
 .../scenarios/dns/multimaster/test_dns.py     |  54 +++++
 tests/pytests/scenarios/dns/test_dns.py       |  37 ++++
 .../multimaster/test_failover_master.py       |   4 -
 tests/pytests/unit/test_minion.py             |   2 +
 13 files changed, 422 insertions(+), 120 deletions(-)
 create mode 100644 tests/pytests/scenarios/dns/__init__.py
 create mode 100644 tests/pytests/scenarios/dns/conftest.py
 create mode 100644 tests/pytests/scenarios/dns/multimaster/conftest.py
 create mode 100644 tests/pytests/scenarios/dns/multimaster/test_dns.py
 create mode 100644 tests/pytests/scenarios/dns/test_dns.py

diff --git a/conf/minion b/conf/minion
index eeef626fa8..f89e18451f 100644
--- a/conf/minion
+++ b/conf/minion
@@ -271,9 +271,8 @@
 #ping_interval: 0
 
 # To auto recover minions if master changes IP address (DDNS)
-#    auth_tries: 10
-#    auth_safemode: True
-#    ping_interval: 2
+#    master_alive_interval: 10
+#    master_tries: -1
 #
 # Minions won't know master is missing until a ping fails. After the ping fail,
 # the minion will attempt authentication and likely fails out and cause a restart.
diff --git a/doc/ref/configuration/minion.rst b/doc/ref/configuration/minion.rst
index 57af5ce4a3..a1b0f2e86e 100644
--- a/doc/ref/configuration/minion.rst
+++ b/doc/ref/configuration/minion.rst
@@ -291,7 +291,9 @@ Default: ``0``
 
 Configures how often, in seconds, the minion will verify that the current
 master is alive and responding.  The minion will try to establish a connection
-to the next master in the list if it finds the existing one is dead.
+to the next master in the list if it finds the existing one is dead. This
+setting can also be used to detect master DNS record changes when a minion has
+been disconnected.
 
 .. code-block:: yaml
 
diff --git a/salt/channel/client.py b/salt/channel/client.py
index 76d7a8e5b9..34aafb2c9e 100644
--- a/salt/channel/client.py
+++ b/salt/channel/client.py
@@ -385,8 +385,6 @@ class AsyncPubChannel:
             # else take the relayed publish_port master reports
             else:
                 publish_port = self.auth.creds["publish_port"]
-            # TODO: The zeromq transport does not use connect_callback and
-            # disconnect_callback.
             yield self.transport.connect(
                 publish_port, self.connect_callback, self.disconnect_callback
             )
diff --git a/salt/config/__init__.py b/salt/config/__init__.py
index b3cd5d85ae..d4865807e6 100644
--- a/salt/config/__init__.py
+++ b/salt/config/__init__.py
@@ -75,7 +75,7 @@ elif salt.utils.platform.is_darwin():
 else:
     _DFLT_IPC_MODE = "ipc"
     _DFLT_FQDNS_GRAINS = False
-    _MASTER_TRIES = 1
+    _MASTER_TRIES = -1
     _MASTER_USER = salt.utils.user.get_user()
 
 
@@ -1272,7 +1272,7 @@ DEFAULT_MINION_OPTS = immutabletypes.freeze(
         "username": None,
         "password": None,
         "zmq_filtering": False,
-        "zmq_monitor": False,
+        "zmq_monitor": True,
         "cache_sreqs": True,
         "cmd_safe": True,
         "sudo_user": "",
diff --git a/salt/minion.py b/salt/minion.py
index e21a017cfd..834f0848c6 100644
--- a/salt/minion.py
+++ b/salt/minion.py
@@ -2737,10 +2737,64 @@ class Minion(MinionBase):
                 # we are not connected anymore
                 self.connected = False
                 log.info("Connection to master %s lost", self.opts["master"])
+                if self.opts["transport"] != "tcp":
+                    self.schedule.delete_job(name=master_event(type="alive"))
+
+                log.info("Trying to tune in to next master from master-list")
+
+                if hasattr(self, "pub_channel"):
+                    self.pub_channel.on_recv(None)
+                    if hasattr(self.pub_channel, "auth"):
+                        self.pub_channel.auth.invalidate()
+                    if hasattr(self.pub_channel, "close"):
+                        self.pub_channel.close()
+                if hasattr(self, "req_channel") and self.req_channel:
+                    self.req_channel.close()
+                    self.req_channel = None
+
+                # if eval_master finds a new master for us, self.connected
+                # will be True again on successful master authentication
+                try:
+                    master, self.pub_channel = yield self.eval_master(
+                        opts=self.opts,
+                        failed=True,
+                        failback=tag.startswith(master_event(type="failback")),
+                    )
+                except SaltClientError:
+                    pass
+
+                if self.connected:
+                    self.opts["master"] = master
+
+                    # re-init the subsystems to work with the new master
+                    log.info(
+                        "Re-initialising subsystems for new master %s",
+                        self.opts["master"],
+                    )
+
+                    self.req_channel = salt.channel.client.AsyncReqChannel.factory(
+                        self.opts, io_loop=self.io_loop
+                    )
 
-                if self.opts["master_type"] != "failover":
-                    # modify the scheduled job to fire on reconnect
-                    if self.opts["transport"] != "tcp":
+                    # put the current schedule into the new loaders
+                    self.opts["schedule"] = self.schedule.option("schedule")
+                    (
+                        self.functions,
+                        self.returners,
+                        self.function_errors,
+                        self.executors,
+                    ) = self._load_modules()
+                    # make the schedule to use the new 'functions' loader
+                    self.schedule.functions = self.functions
+                    self.pub_channel.on_recv(self._handle_payload)
+                    self._fire_master_minion_start()
+                    log.info("Minion is ready to receive requests!")
+
+                    # update scheduled job to run with the new master addr
+                    if (
+                        self.opts["transport"] != "tcp"
+                        and self.opts["master_alive_interval"] > 0
+                    ):
                         schedule = {
                             "function": "status.master",
                             "seconds": self.opts["master_alive_interval"],
@@ -2749,116 +2803,35 @@ class Minion(MinionBase):
                             "return_job": False,
                             "kwargs": {
                                 "master": self.opts["master"],
-                                "connected": False,
+                                "connected": True,
                             },
                         }
                         self.schedule.modify_job(
                             name=master_event(type="alive", master=self.opts["master"]),
                             schedule=schedule,
                         )
-                else:
-                    # delete the scheduled job to don't interfere with the failover process
-                    if self.opts["transport"] != "tcp":
-                        self.schedule.delete_job(name=master_event(type="alive"))
-
-                    log.info("Trying to tune in to next master from master-list")
-
-                    if hasattr(self, "pub_channel"):
-                        self.pub_channel.on_recv(None)
-                        if hasattr(self.pub_channel, "auth"):
-                            self.pub_channel.auth.invalidate()
-                        if hasattr(self.pub_channel, "close"):
-                            self.pub_channel.close()
-                        del self.pub_channel
-
-                    # if eval_master finds a new master for us, self.connected
-                    # will be True again on successful master authentication
-                    try:
-                        master, self.pub_channel = yield self.eval_master(
-                            opts=self.opts,
-                            failed=True,
-                            failback=tag.startswith(master_event(type="failback")),
-                        )
-                    except SaltClientError:
-                        pass
-
-                    if self.connected:
-                        self.opts["master"] = master
-
-                        # re-init the subsystems to work with the new master
-                        log.info(
-                            "Re-initialising subsystems for new master %s",
-                            self.opts["master"],
-                        )
-
-                        self.req_channel = (
-                            salt.transport.client.AsyncReqChannel.factory(
-                                self.opts, io_loop=self.io_loop
-                            )
-                        )
-
-                        # put the current schedule into the new loaders
-                        self.opts["schedule"] = self.schedule.option("schedule")
-                        (
-                            self.functions,
-                            self.returners,
-                            self.function_errors,
-                            self.executors,
-                        ) = self._load_modules()
-                        # make the schedule to use the new 'functions' loader
-                        self.schedule.functions = self.functions
-                        self.pub_channel.on_recv(self._handle_payload)
-                        self._fire_master_minion_start()
-                        log.info("Minion is ready to receive requests!")
-
-                        # update scheduled job to run with the new master addr
-                        if self.opts["transport"] != "tcp":
-                            schedule = {
-                                "function": "status.master",
-                                "seconds": self.opts["master_alive_interval"],
-                                "jid_include": True,
-                                "maxrunning": 1,
-                                "return_job": False,
-                                "kwargs": {
-                                    "master": self.opts["master"],
-                                    "connected": True,
-                                },
-                            }
-                            self.schedule.modify_job(
-                                name=master_event(
-                                    type="alive", master=self.opts["master"]
-                                ),
-                                schedule=schedule,
-                            )
 
-                            if (
-                                self.opts["master_failback"]
-                                and "master_list" in self.opts
-                            ):
-                                if self.opts["master"] != self.opts["master_list"][0]:
-                                    schedule = {
-                                        "function": "status.ping_master",
-                                        "seconds": self.opts[
-                                            "master_failback_interval"
-                                        ],
-                                        "jid_include": True,
-                                        "maxrunning": 1,
-                                        "return_job": False,
-                                        "kwargs": {
-                                            "master": self.opts["master_list"][0]
-                                        },
-                                    }
-                                    self.schedule.modify_job(
-                                        name=master_event(type="failback"),
-                                        schedule=schedule,
-                                    )
-                                else:
-                                    self.schedule.delete_job(
-                                        name=master_event(type="failback"), persist=True
-                                    )
-                    else:
-                        self.restart = True
-                        self.io_loop.stop()
+                        if self.opts["master_failback"] and "master_list" in self.opts:
+                            if self.opts["master"] != self.opts["master_list"][0]:
+                                schedule = {
+                                    "function": "status.ping_master",
+                                    "seconds": self.opts["master_failback_interval"],
+                                    "jid_include": True,
+                                    "maxrunning": 1,
+                                    "return_job": False,
+                                    "kwargs": {"master": self.opts["master_list"][0]},
+                                }
+                                self.schedule.modify_job(
+                                    name=master_event(type="failback"),
+                                    schedule=schedule,
+                                )
+                            else:
+                                self.schedule.delete_job(
+                                    name=master_event(type="failback"), persist=True
+                                )
+                else:
+                    self.restart = True
+                    self.io_loop.stop()
 
         elif tag.startswith(master_event(type="connected")):
             # handle this event only once. otherwise it will pollute the log
@@ -2870,7 +2843,10 @@ class Minion(MinionBase):
                 self.connected = True
                 # modify the __master_alive job to only fire,
                 # if the connection is lost again
-                if self.opts["transport"] != "tcp":
+                if (
+                    self.opts["transport"] != "tcp"
+                    and self.opts["master_alive_interval"] > 0
+                ):
                     schedule = {
                         "function": "status.master",
                         "seconds": self.opts["master_alive_interval"],
diff --git a/salt/transport/zeromq.py b/salt/transport/zeromq.py
index 7cc6b9987f..89f705190e 100644
--- a/salt/transport/zeromq.py
+++ b/salt/transport/zeromq.py
@@ -1,6 +1,7 @@
 """
 Zeromq transport classes
 """
+
 import errno
 import hashlib
 import logging
@@ -211,6 +212,12 @@ class PublishClient(salt.transport.base.PublishClient):
             self.master_pub,
         )
         log.debug("%r connecting to %s", self, self.master_pub)
+        if (
+            hasattr(self, "_monitor")
+            and self._monitor is not None
+            and disconnect_callback is not None
+        ):
+            self._monitor.disconnect_callback = disconnect_callback
         self._socket.connect(self.master_pub)
         connect_callback(True)
 
@@ -680,13 +687,21 @@ class ZeroMQSocketMonitor:
         log.debug("ZeroMQ event: %s", evt)
         if evt["event"] == zmq.EVENT_MONITOR_STOPPED:
             self.stop()
+        elif evt["event"] == zmq.EVENT_DISCONNECTED:
+            if (
+                hasattr(self, "disconnect_callback")
+                and self.disconnect_callback is not None
+            ):
+                self.disconnect_callback()
 
     def stop(self):
         if self._socket is None:
             return
         self._socket.disable_monitor()
         self._socket = None
-        self._monitor_socket = None
+        if self._monitor_socket is not None:
+            self._monitor_socket.close()
+            self._monitor_socket = None
         if self._monitor_stream is not None:
             self._monitor_stream.close()
             self._monitor_stream = None
diff --git a/tests/pytests/scenarios/dns/__init__.py b/tests/pytests/scenarios/dns/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/pytests/scenarios/dns/conftest.py b/tests/pytests/scenarios/dns/conftest.py
new file mode 100644
index 0000000000..5a8850719f
--- /dev/null
+++ b/tests/pytests/scenarios/dns/conftest.py
@@ -0,0 +1,99 @@
+import logging
+import pathlib
+import subprocess
+
+import pytest
+
+log = logging.getLogger(__name__)
+
+
+@pytest.fixture(scope="package")
+def master_alive_interval():
+    return 5
+
+
+class HostsFile:
+    """
+    Simple helper class for tests that need to modify /etc/hosts.
+    """
+
+    def __init__(self, path, orig_text):
+        self._path = path
+        self._orig_text = orig_text
+
+    @property
+    def orig_text(self):
+        return self._orig_text
+
+    def __getattr__(self, key):
+        if key in ["_path", "_orig_text", "orig_text"]:
+            return self.__getattribute__(key)
+        return getattr(self._path, key)
+
+
+@pytest.fixture
+def etc_hosts():
+    hosts = pathlib.Path("/etc/hosts")
+    orig_text = hosts.read_text(encoding="utf-8")
+    hosts = HostsFile(hosts, orig_text)
+    try:
+        yield hosts
+    finally:
+        hosts.write_text(orig_text)
+
+
+@pytest.fixture(scope="package")
+def master(request, salt_factories):
+
+    try:
+        subprocess.check_output(["ip", "addr", "add", "172.16.0.1/32", "dev", "lo"])
+        ip_addr_set = True
+    except subprocess.CalledProcessError:
+        ip_addr_set = False
+
+    config_defaults = {
+        "open_mode": True,
+        "transport": request.config.getoption("--transport"),
+    }
+    config_overrides = {
+        "interface": "0.0.0.0",
+    }
+    factory = salt_factories.salt_master_daemon(
+        "master",
+        defaults=config_defaults,
+        overrides=config_overrides,
+        extra_cli_arguments_after_first_start_failure=["--log-level=info"],
+    )
+    factory.ip_addr_set = ip_addr_set
+    with factory.started(start_timeout=180):
+        yield factory
+
+    try:
+        subprocess.check_output(["ip", "addr", "del", "172.16.0.1/32", "dev", "lo"])
+    except subprocess.CalledProcessError:
+        pass
+
+
+@pytest.fixture(scope="package")
+def salt_cli(master):
+    return master.salt_cli(timeout=180)
+
+
+@pytest.fixture(scope="package")
+def minion(master, master_alive_interval):
+    config_defaults = {
+        "transport": master.config["transport"],
+    }
+    port = master.config["ret_port"]
+    config_overrides = {
+        "master": f"master.local:{port}",
+        "publish_port": master.config["publish_port"],
+        "master_alive_interval": master_alive_interval,
+    }
+    factory = master.salt_minion_daemon(
+        "minion",
+        defaults=config_defaults,
+        overrides=config_overrides,
+        extra_cli_arguments_after_first_start_failure=["--log-level=info"],
+    )
+    return factory
diff --git a/tests/pytests/scenarios/dns/multimaster/conftest.py b/tests/pytests/scenarios/dns/multimaster/conftest.py
new file mode 100644
index 0000000000..3333f812ce
--- /dev/null
+++ b/tests/pytests/scenarios/dns/multimaster/conftest.py
@@ -0,0 +1,124 @@
+import logging
+import os
+import shutil
+import subprocess
+
+import pytest
+
+log = logging.getLogger(__name__)
+
+
+@pytest.fixture(scope="package")
+def salt_mm_master_1(request, salt_factories):
+
+    try:
+        subprocess.check_output(["ip", "addr", "add", "172.16.0.1/32", "dev", "lo"])
+        ip_addr_set = True
+    except subprocess.CalledProcessError:
+        ip_addr_set = False
+
+    config_defaults = {
+        "open_mode": True,
+        "transport": request.config.getoption("--transport"),
+    }
+    config_overrides = {
+        "interface": "0.0.0.0",
+        "master_sign_pubkey": True,
+    }
+    factory = salt_factories.salt_master_daemon(
+        "mm-master-1",
+        defaults=config_defaults,
+        overrides=config_overrides,
+        extra_cli_arguments_after_first_start_failure=["--log-level=info"],
+    )
+    factory.ip_addr_set = ip_addr_set
+    try:
+        with factory.started(start_timeout=180):
+            yield factory
+    finally:
+
+        try:
+            subprocess.check_output(["ip", "addr", "del", "172.16.0.1/32", "dev", "lo"])
+        except subprocess.CalledProcessError:
+            pass
+
+
+@pytest.fixture(scope="package")
+def mm_master_1_salt_cli(salt_mm_master_1):
+    return salt_mm_master_1.salt_cli(timeout=180)
+
+
+@pytest.fixture(scope="package")
+def salt_mm_master_2(salt_factories, salt_mm_master_1):
+    # if salt.utils.platform.is_darwin() or salt.utils.platform.is_freebsd():
+    #    subprocess.check_output(["ifconfig", "lo0", "alias", "127.0.0.2", "up"])
+
+    config_defaults = {
+        "open_mode": True,
+        "transport": salt_mm_master_1.config["transport"],
+    }
+    config_overrides = {
+        "interface": "0.0.0.0",
+        "master_sign_pubkey": True,
+    }
+
+    # Use the same ports for both masters, they are binding to different interfaces
+    for key in (
+        "ret_port",
+        "publish_port",
+    ):
+        config_overrides[key] = salt_mm_master_1.config[key] + 1
+    factory = salt_factories.salt_master_daemon(
+        "mm-master-2",
+        defaults=config_defaults,
+        overrides=config_overrides,
+        extra_cli_arguments_after_first_start_failure=["--log-level=info"],
+    )
+
+    # Both masters will share the same signing key pair
+    for keyfile in ("master_sign.pem", "master_sign.pub"):
+        shutil.copyfile(
+            os.path.join(salt_mm_master_1.config["pki_dir"], keyfile),
+            os.path.join(factory.config["pki_dir"], keyfile),
+        )
+    with factory.started(start_timeout=180):
+        yield factory
+
+
+@pytest.fixture(scope="package")
+def mm_master_2_salt_cli(salt_mm_master_2):
+    return salt_mm_master_2.salt_cli(timeout=180)
+
+
+@pytest.fixture(scope="package")
+def salt_mm_minion_1(salt_mm_master_1, salt_mm_master_2, master_alive_interval):
+    config_defaults = {
+        "transport": salt_mm_master_1.config["transport"],
+    }
+
+    mm_master_1_port = salt_mm_master_1.config["ret_port"]
+    mm_master_2_port = salt_mm_master_2.config["ret_port"]
+    config_overrides = {
+        "master": [
+            f"master1.local:{mm_master_1_port}",
+            f"master2.local:{mm_master_2_port}",
+        ],
+        "publish_port": salt_mm_master_1.config["publish_port"],
+        "master_alive_interval": master_alive_interval,
+        "master_tries": -1,
+        "verify_master_pubkey_sign": True,
+        "retry_dns": True,
+    }
+    factory = salt_mm_master_1.salt_minion_daemon(
+        "mm-minion-1",
+        defaults=config_defaults,
+        overrides=config_overrides,
+        extra_cli_arguments_after_first_start_failure=["--log-level=info"],
+    )
+    # Need to grab the public signing key from the master, either will do
+    shutil.copyfile(
+        os.path.join(salt_mm_master_1.config["pki_dir"], "master_sign.pub"),
+        os.path.join(factory.config["pki_dir"], "master_sign.pub"),
+    )
+    # with factory.started(start_timeout=180):
+    yield factory
diff --git a/tests/pytests/scenarios/dns/multimaster/test_dns.py b/tests/pytests/scenarios/dns/multimaster/test_dns.py
new file mode 100644
index 0000000000..fafb30c12e
--- /dev/null
+++ b/tests/pytests/scenarios/dns/multimaster/test_dns.py
@@ -0,0 +1,54 @@
+import logging
+import subprocess
+import time
+
+import pytest
+
+log = logging.getLogger(__name__)
+
+
+@pytest.mark.skip_unless_on_linux
+@pytest.mark.skip_if_not_root
+def test_multimaster_dns(
+    salt_mm_master_1,
+    salt_mm_minion_1,
+    mm_master_1_salt_cli,
+    etc_hosts,
+    caplog,
+    master_alive_interval,
+):
+    """
+    Verify a minion configured with multimaster hot/hot will pick up a master's
+    dns change if it's been disconnected.
+    """
+
+    if not salt_mm_master_1.ip_addr_set:
+        pytest.skip("Unable to set additional IP address for master1")
+
+    etc_hosts.write_text(
+        f"{etc_hosts.orig_text}\n172.16.0.1    master1.local master2.local"
+    )
+
+    log.info("Added hosts record for master1.local and master2.local")
+
+    with salt_mm_minion_1.started(start_timeout=180):
+        with caplog.at_level(logging.INFO):
+            ret = mm_master_1_salt_cli.run("test.ping", minion_tgt="mm-minion-1")
+            assert ret.returncode == 0
+            etc_hosts.write_text(
+                f"{etc_hosts.orig_text}\n127.0.0.1    master1.local master2.local"
+            )
+            log.info("Changed hosts record for master1.local and master2.local")
+            subprocess.check_output(["ip", "addr", "del", "172.16.0.1/32", "dev", "lo"])
+            log.info("Removed secondary master IP address.")
+            # Wait for the minion's master_alive_interval, adding a second for
+            # reliablity.
+            time.sleep(master_alive_interval + 1)
+            assert (
+                "Master ip address changed from 172.16.0.1 to 127.0.0.1" in caplog.text
+            )
+            ret = mm_master_1_salt_cli.run("test.ping", minion_tgt="mm-minion-1")
+            assert ret.returncode == 0
+            assert (
+                "Master ip address changed from 172.16.0.1 to 127.0.0.1" in caplog.text
+            )
diff --git a/tests/pytests/scenarios/dns/test_dns.py b/tests/pytests/scenarios/dns/test_dns.py
new file mode 100644
index 0000000000..cd33f0e7f0
--- /dev/null
+++ b/tests/pytests/scenarios/dns/test_dns.py
@@ -0,0 +1,37 @@
+import logging
+import subprocess
+import time
+
+import pytest
+
+log = logging.getLogger(__name__)
+
+
+@pytest.mark.skip_unless_on_linux
+@pytest.mark.skip_if_not_root
+def test_dns_change(master, minion, salt_cli, etc_hosts, caplog, master_alive_interval):
+    """
+    Verify a minion will pick up a master's dns change if it's been disconnected.
+    """
+
+    if not master.ip_addr_set:
+        pytest.skip("Unable to set additional IP address for master")
+
+    etc_hosts.write_text(f"{etc_hosts.orig_text}\n172.16.0.1    master.local")
+
+    with minion.started(start_timeout=180):
+        with caplog.at_level(logging.INFO):
+            ret = salt_cli.run("test.ping", minion_tgt="minion")
+            assert ret.returncode == 0
+            etc_hosts.write_text(f"{etc_hosts.orig_text}\n127.0.0.1    master.local")
+            log.info("Changed hosts record for master1.local and master2.local")
+            subprocess.check_output(["ip", "addr", "del", "172.16.0.1/32", "dev", "lo"])
+            log.info("Removed secondary master IP address.")
+            # Wait for the minion's master_alive_interval, adding a second for
+            # reliablity.
+            time.sleep(master_alive_interval + 1)
+            assert (
+                "Master ip address changed from 172.16.0.1 to 127.0.0.1" in caplog.text
+            )
+            ret = salt_cli.run("test.ping", minion_tgt="minion")
+            assert ret.returncode == 0
diff --git a/tests/pytests/scenarios/failover/multimaster/test_failover_master.py b/tests/pytests/scenarios/failover/multimaster/test_failover_master.py
index 9f6251a4d6..ebb2899ff0 100644
--- a/tests/pytests/scenarios/failover/multimaster/test_failover_master.py
+++ b/tests/pytests/scenarios/failover/multimaster/test_failover_master.py
@@ -162,10 +162,6 @@ def test_minions_alive_with_no_master(
     """
     Make sure the minions stay alive after all masters have stopped.
     """
-    if grains["os_family"] == "Debian" and grains["osmajorrelease"] == 9:
-        pytest.skip(
-            "Skipping on Debian 9 until flaky issues resolved. See issue #61749"
-        )
     start_time = time.time()
     with salt_mm_failover_master_1.stopped():
         with salt_mm_failover_master_2.stopped():
diff --git a/tests/pytests/unit/test_minion.py b/tests/pytests/unit/test_minion.py
index a9e91742a2..017c28d163 100644
--- a/tests/pytests/unit/test_minion.py
+++ b/tests/pytests/unit/test_minion.py
@@ -884,6 +884,8 @@ async def test_master_type_failover(minion_opts):
         assert opts["master"] == "master2"
         return MockPubChannel()
 
+    minion_opts["master_tries"] = 1
+
     with patch("salt.minion.resolve_dns", mock_resolve_dns), patch(
         "salt.channel.client.AsyncPubChannel.factory", mock_channel_factory
     ), patch("salt.loader.grains", MagicMock(return_value=[])):
-- 
2.47.0

Places

File make-minion-reconnecting-on-changing-master-ip-bsc-1.patch of Package salt (Revision 11dcc79592c78b59795bb81f26cf7e22)

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