This can be tested with this command :
ansible -c local -m copy -a 'src=/etc/group dest=foo/' all
This is a corner case of the algorithm used to find how we should
copy recursively a folder, and this commit detect it and avoid it.
Check https://github.com/ansible/ansible/issues/9092 for the story
* Make the module support enable/disable of special services like pf via rcctl.
Idea and method from @jarmani.
* Make the module handle when the user supplied 'arguments' variable does not
match the current flags in rc.conf.local.
* Update description now that the code tries to use rcctl for everything if it
is available.
Based on input from @jarmani:
* A return value of 2 now means a service does not exist. Instead of
trying to handle the different meanings of rc after running "status",
just look at stderr to know if something failed.
* Skip looking at stdout to make the code cleaner. Any errors should
turn up on stderr.
Using rds2 allows tags and the control over whether or not DBs are
publicly accessible.
Move RDS towards a pair of interfaces implementing the details of rds
and rds2
Added tests to ensure that all operations work correctly as well as
requirements files that allow virtualenvs to test either boto.rds or
boto.rds2
Yum does not always update to latest package version unless metadata cache has expired. By runing yum makecache, we ensure the metadata cache has been updated.
Signed-off-by: René Moser <mail@renemoser.net>
Or is "rules_egree" supposed to be a plural? The sentence is difficult to parse.
Maybe the correct fix is to "Purge existing rules on security group that are not found in rules_egress"?
Without this fix, _get_flavor_id() fails to find a matching flavor if
both:
* the flavor_ram parameter is specified
* the first flavor in the list does not match.
The bug is simply that the module.fail_json() call lies within the loop
iterating through the flavors. This call should only be made if the
loop completes and no matching flavors have been found.
Without this patch, ansible-doc was failing this way:
$ ansible-doc nova_compute
Traceback (most recent call last):
File "/home/francois/WORK/dev/ansible/bin/ansible-doc", line 324, in <module>
main()
File "/home/francois/WORK/dev/ansible/bin/ansible-doc", line 316, in main
text += get_man_text(doc)
File "/home/francois/WORK/dev/ansible/bin/ansible-doc", line 112, in get_man_text
desc = " ".join(opt['description'])
KeyError: 'description'
Document the wait and wait_timeout params for ec2_snapshot.
This is important because snapshots can take a long time to complete,
and the module defaults to wait=yes.
Encouraging users to use this Ansible module to enable SELinux seems
like a better idea. It also warms Dan Walsh's heart.
Signed-off-by: Major Hayden <major@mhtx.net>
Allows user to decide if git submodule should track branches/tags or track commit hashes defined in the superproject.
Add track_branches parameter to the git module.
Defaults to track branches behavior.
This adds back the change to the network_cli plugin. Ths change adds
the ensure_connect decorator to the open_shell() method to make sure
the connection is valid before trying to open a shell.
The issue was due to the addition of the decorator that will call
_connect() when there is no connection. The _connect() method should
have been mocked in the test case. This commit fixes the test
case as well
Change was originally reverted in c414ded69a
* make hash_params more robust in the face of many corner cases
Fixes#18680
Alternative fix to #18681
* add test case for role.hash_params
* Add role.hash_params test for more types
A set, a generator/iterable, and a Container that
is not Iterable.
* removes superfluous timeout kwargs from open_shell()
* cleans up play_context become check
* adds check for ssh session and calls _connect() if needed
* Moved JSON-RPC client IPAClient class to ansible.module_utils.ipa, which is extended by all ipa modules
* IPAClient: Changed to 2-clause BSD license
* IPAClient (lines 37-39): Added some additional imports for use with Python 3
* IPAClient (line 41): Explicitly extend Python base object
* IPAClient (line 57): Properly URL quoted the username/password form data as per https://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.1
* IPAClient (line 62): Data should be bytes or bytearray in Python 3 (still str in Python 2)
* IPAClient (line 65): Print error message, not returned body
* IPAClient (line 70): getheader() is not present in Python 3 version of HTTPMessage; get() is present in both Python 2/3
* IPAClient (line 88): Convert form data to bytes for Python 3 again
* IPAClient (line 91): Print error message, not returned body
* IPAClient (line 96-104): json.loads() requires a string; HTTPResponse.read() returns bytes in Python 3 and str in Python 2, so decode the bytes/string using the HTTPResponse returned charset (default to 'latin-1')
* Add author/copyright notice
* Add RHEV host detection support
This adds RHEV host detection support based on a running 'vdsm' process and the existence of _/rhev/_ (which are both part of the vdsm RPM package in a RHEV installation). Without this change, a RHEV host would be reported as a kvm host (which is also true, but often not specific enough).
This closes#17058
* Only scan the process list when we determined /rhev/ exists
Small performance improvement, so we do not have to scan the process list if /rhev/ does not exist.
* fixed detection of ansible_virtualization_(role|path) facts for VM's running in
OpenStack Instances
* NOTE: this will break detection of ansible_virtualization_(role|path) facts
if you are using Openstack Instaces with nested virtualization
* fixed detection of ansible_virtualization_(role|path) facts for VM's running in
OpenStack Instances
Fixes#15165
* NOTE: this will break detection of ansible_virtualization_(role|path) facts
if you are using Openstack Instaces with nested virtualization
The parsing methods try as hard as possible to generate meaningful error messages that are all ignored and immediately overwritten by a new AnsibleError instance. Better use the original one instead.
Commit ec2521f intended to fix the scp command to fetch files
from a remote machine but it has src and dest swapped.
This change correctly treats src as the location in the remote machine
and dest as the location in the local machine.
Signed-off-by: Alberto Murillo Silva <alberto.murillo.silva@intel.com>
This updates the network_cli connection plugin to attempt to automatically
determine the remote device os. The device network os discovery can
be overridden by setting the ansible_network_os value.
* sends the serialized play_context into an already established connection
* hooks the alarm_handler() method in the connection plugin if it exists
* added configuration options for connect interval and retries
* adds syslog logging to Server() instance
This update will send the updated play_context back into an already
established connection in case privilege escalation / descalation activities
need to be performed. This change will also hook the alarm_handler() method
in the connection instance (if available) and call it in case of a
sigalarm raised.
This update adds two new configuration options
* PERSISTENT_CONNECT_INTERVAL - time to wait in between connection attempts
* PERSISTENT_CONNECT_RETRIES - max number of retries
* Implement docker support for synchronize module.
Note : you need rsync installation on your docker container.
Have a look at https://github.com/ansible/ansible/issues/16306 for more details.
Support Ansible options for remote access.
* Give user name to docker command.
* log on target based on nolog, not verbosity
fies #18569
* initialize module name
removing verbosity exposed missing name at certain stages, initialize to file name
and update later once module args are parsed
* Fix regression in jinja2 include search path
Since commit 3c39bb5, the 'ansible_search_path' variable is used to set
jinja2's search path for {% include %} directives. However, this path is
the the proper one because our templates live in 'templates' subdirs in
our search path.
This is a regression because previously, our include search path would
include the dirname of the currently interpreted file, which worked most
of the time.
fixes#18526
* Fix template lookup search path
Improve fix in commit c96c853 so that the search path contain both
template-suffixed paths as well as original paths.
ref PR #18617
* Add integration test for template lookups
Tests regression at #18526
This test fails on current devel branch and succeeds on PR #18617
Some machines have system clocks which can fall behind (for instance,
a host without a CMOS battery like Raspberry Pi). When managing those
machines we have to workaround the fact that the zip format does not
handle file timestamps before 1980. The workaround is to substitute in
the timestamp from the controller instead of from the managed machine.
Fixes#18640
* Make sure include_role inherit variables from parent role
Setting the parent of task blocks generated by include_role after they
have been produced is not sufficient - it means the tasks don't have the
correct dependency chain set afterwards, and therefore, don't properly
inherit variables from outer roles.
In addition to manually setting the parents, pass the dep_chain when
compiling the role, such that variables are correctly imported.
Fixes#18540.
* Add tests for include_role
* Fix include_role variable inheritance for multiple parent levels
Commit 8b08a28c89 removed a
call to get_exception() that was needed. Without it, the fail_json
references an undefined variable ('exception') and throws an exception.
Add the get_exception() back in where needed and update references.
Now the proper module failure is returned.
Fixes#18628
* adds new connection plugin `network_cli` which builds on paramiko
* adds new plugin `terminal` used for manipulating network_cli terminals
* adds new field to play_context `network_os` settable as ansible_network_os
This commit adds the plugins necesary to establish a persistent cli connection
to network devices of ssh. It builds on the paramiko connection plugin
to create a shell environment that will persistent through ansible-connection.
The `newtork_cli` plugin then uses the network_os in the instance of
PlayContext to load the appropriate network OS environment plugin for
handling opening and closing of shells as well as privilege escalation.
* updates paramiko_ssh to auto add keys
* updates constants with new config options
This commit adds a new feature that will allow paramiko to automatically
accept and save a host ssh key. This feature is controlled by the
`host_key_auto_add` config setting in the paramiko section. The default
is False to maintain current functionality. It also includes a new
setting `look_for_keys` with the default to False for maintaining current the
current setting.
The timeout param was exposed to the socket connection but was not
enforced for commands. This update will now cause a command to timeout
based on the module parameter.
Fetch module uses fetch_file() from plugin/connection/ssh.py to
retrieve files from the remote hosts which in turns uses
_file_transport_command(self, in_path, out_path, sftp_action) being
sftp_action = 'get'
When using scp rather than sftp, sftp_action variable is not used
and the scp command is formed in a way that the file is always
sent to the remote machine
This patch fixes _file_transport_command() to correctly form the scp
swaping src and dest if sftp_action is 'get'
Bug introduced at 8e47b9bFixes#18603
Signed-off-by: Alberto Murillo Silva <alberto.murillo.silva@intel.com>
When determining which getter style to use for the object in question,
the BaseMeta class should look at both dict's to try and locate the method.
Fixes#18522
For setfacl on Solaris we need to specify permissions like r-x.
For chmod, we need to specify them as rx (r-x means to make the file
readable and *not* executable)
for solaris, add get_dmi_facts to get product_name fact, and update memtotal_mb to integer for consistency.
for hp-ux, user machinfo to get product_serial fact
The _fixup_perms2 method checks to see if the user that is being sudo'd
is an unprivileged user or root. If it is an unprivileged user, some
checks are done to see if becoming this user would lock the ssh user out
of temp files, among other things. If this check fails, an error prints
telling the user to check the documentation for becoming an unprivileged
user.
On some systems, the stderr prints out the unprivileged user the ssh
user was trying to become contained in smartquotes. These quotes aren't
in the ASCII range, and so when we're trying to call `str.format()` to
combine the stderr message with the error text we get a
UnicodeEncodeError as python can't coerce the smartquotes using the
system default encoding. By calling `to_native()` on the error message
we can ensure that the error message is a native string for the
`Exception` handling, as `Exception` messages need to be native strings
to avoid errors (byte strings in python2, and text strings in python3)
Fixes: #18444
Previously, the Conditional class did a simple check when an
AnsibleUndefinedVariable error was raised to see if certain strings were
present. This patch tries to be smarter by evaluating the variable contained
in the error string and compared to the defined/not defined conditionals in
the conditional string.
This also modifies the UndefinedError message from HostVars slightly to
match the format returned jinja2 in general, making it easier to match the
error message in the Conditional code.
Fixes#18514
VMs in VPC and not in VPC can have an identical name. As a result VMs in a VPC must be sorted out if no VPC is given.
Due the API limitation, the only way is to check if the network of the VM is in a VPC.
With 2.0, we decided to create a special list of param names which were
taken out of the role data structure and stored as params instead (connection,
port, and remote_user). This causes problems with inheritance of these params,
so we are now deprecating that while also keeping those keys in the ds so they
are brought in as attributes on the Role correctly.
Fixes#17395
* Moved the _inventory.clear_group_dict_cache() from creating a group which doesn't exist, to adding members to the group.
* Update __init__.py
Update to use changed: block to catch all changes for cache clear as suggested
Fixes#18544.
When a loop is over an empty list, the result is set to
{'skipped_reason': u'No items in the list', 'skipped': True, 'changed': False}
which means that accessing `hr._result['results']` throws a `KeyError`.
- Better switch between *dense* and *default*
- Reimplement C.COLOR* out of necessity (help!)
- Make verbose output more dense (clean up result)
- Implement our own dumper
- Improve delegation support
The goal for the "dense" output is to only show changes and failures on-screen (the Unix-way).
However, since we still want to have a sense of progress, we use terminal capabilities to display progress.
- On screen there should only be relevant stuff
- How far are we ? (during run, last line)
- What issues occured
- What changes occured
- Diff output
- If verbosity increases, act as default output
So that users can easily switch to default for troubleshooting
- Leave previous task output on screen
- If we would clear the line at the start of a task, there would often
be no information at all
- We use the cursor to indicate where in the task we are.
Output after the prompt is the output of the previous task
- Use the same color-conventions of Ansible
This is still a work in progress.
It was released to give a glimpse of what would be possible.
The Ansible callback mechanism currently does not have all the functionality we need to do this efficiently.
* Replace pipes.quote for shlex_quote
* More migration of pipes.quote to shlex_quote
Note that we cannot yet move module code over. Modules have six-1.4
bundled which does not have shlex_quote. This shouldn't be a problem as
the function is still importable from pipes.quote. It's just that this
has become an implementation detail that makes us want to import from
shlex instead.
Once we get rid of the python2.4 dependency we can update to a newer
version of bundled six module-side and then we're free to use
shlex_quote everywhere.
Previous changes addressed a corner case, which unfortunately introduced
another bug. This patch adds a new flag to the host state (did_rescue) which
is set to true when the rescue portion of a block completes. This flag is
then checked in _check_failed_state() when the fail_state != FAILED_NONE.
This lead to the discovery of another bug - current strategies are not advancing
hosts to ITERATING_COMPLETE after doing a peek at the next task, leaving the
host state in the run_state of the final task. To address this, before gathering
the list of failed hosts in StrategyBase.run(), a final pass through the iterator
for all hosts is done to ensure each host is in its final state. This way, no
strategy derived from StrategyBase has to worry about it and it's handled.
Fixes#17983
* Have template action plugin call do_template
Avoids all the magic done for 'inline templating' for ansible plays.
renamed _do_template to do_template in templar to make externally accessible.
fixes#18192
* added backwards compat as per feedback
When loading an include statically, we previously were simply doing a
copy() of the TaskInclude object, which recurses up the parents creating
a new lineage of objects. This caused problems when used inside load_list_of_blocks
as the new parent Block of the new TaskInclude was not actually in the list
of blocks being operated on. In most circumstances, this did not cause a
problem as the new parent block was a proper copy, however when used in
combination with PlaybookInclude (which copies conditionals to the list of
blocks loaded) this untracked parent was not being properly updated, leading
to tasks being run improperly.
Fixes#18206
In some situations, where the Base class defines an Attribute, the
BaseMeta class doesn't properly see the _get_parent_attribute or
_get_attr_<whatever> methods because of multiple layers of subclasses
(ie. Handler, which subclasses Task). This addresses that by merging
the __dict__ of the parent with the current classes __dict__ meaning
all future iterations see available special methods.
Fixes#18378
* Refactor OpenBSD sysctl based detection in a separate class
The idea is later to reuse this code for NetBSD and FreeBSD, who
use a different sysctl key for vendor and product.
* Add detection of virtualisation on NetBSD
* Add support to detect running as a Xen guest
tested on NetBSD 7 on Rackspace.
* Add support for OpenBSD dmi fact gathering
* Refactor get_sysctl in the Hardware class
Due to difference between Darwin/NetBSD and OpenBSD, we
have to change the regexp used split the key/value
* Add support for dmi facts on NetBSD
Text strings and byte strings both have a translate method but the byte
string version is harder to use. It requires a mapping of all 256 bytes
to a translation value. Text strings only require a mapping from the
characters that are changing to the new string. Switching to text
strings on both py2 and py3 allows us to state what we're getting rid of
simply without having to rely on the maketrans() helper function.
The traceback is the following:
Traceback (most recent call last):
File \"/tmp/ansible_8s0bj604/ansible_module_setup.py\", line 134, in <module>
main()
File \"/tmp/ansible_8s0bj604/ansible_module_setup.py\", line 126, in main
data = get_all_facts(module)
File \"/tmp/ansible_8s0bj604/ansible_modlib.zip/ansible/module_utils/facts.py\", line 3641, in get_all_facts
File \"/tmp/ansible_8s0bj604/ansible_modlib.zip/ansible/module_utils/facts.py\", line 3584, in ansible_facts
File \"/tmp/ansible_8s0bj604/ansible_modlib.zip/ansible/module_utils/facts.py\", line 1600, in populate
File \"/tmp/ansible_8s0bj604/ansible_modlib.zip/ansible/module_utils/facts.py\", line 1649, in get_memory_facts
TypeError: translate() takes exactly one argument (2 given)
And the swapctl output is this:
# /sbin/swapctl -sk
total: 83090 1K-blocks allocated, 0 used, 83090 available
The only use of the code is to remove prefix in case they are present, so just
replacing them with empty space is sufficient.
smbios -i 256 return:
# smbios -i 256
ID SIZE TYPE
256 77 SMB_TYPE_SYSTEM (system information)
Manufacturer: Red Hat
Product: KVM
Version: RHEL 6.4.0 PC
UUID: 8a3b8b1a-ba59-1a4b-5f85-ab53a5a885a9
Wake-Up Event: 0x6 (power switch)
SKU Number:
Family: Red Hat Enterprise Linux
* Fix bug (#18355) where encrypted inventories fail
This is first part of fix for #18355
* Make DataLoader._get_file_contents return bytes
The issue #18355 is caused by a change to inventory to
stop using _get_file_contents so that it can handle text
encoding itself to better protect against harmless text
encoding errors in ini files (invalid unicode text in
comment fields).
So this makes _get_file_contents return bytes so it and other
callers can handle the to_text().
The data returned by _get_file_contents() is now a bytes object
instead of a text object. The callers of _get_file_contents() have
been updated to call to_text() themselves on the results.
Previously, the ini parser attempted to work around
ini files that potentially include non-vailid unicode
in comment lines. To do this, it stopped using
DataLoader._get_file_contents() which does the decryption of
files if vault encrypted. It didn't use that because _get_file_contents
previously did to_text() on the read data itself.
_get_file_contents() returns a bytestring now, so ini.py
can call it and still special case ini file comments when
converting to_text(). That also means encrypted inventory files
are decrypted first.
Fixes#18355
So to get the type of the python interpreter, we need to look at
sys.implementation.name which do not return 'cpython', instead of 'CPython',
but that's upstream breakage, so not much we can do.
While testing on netbsd 6.0, ansible setup failed with:
Traceback (most recent call last):
File \"/tmp/ansible_m2ieeq/ansible_module_setup.py\", line 134, in <module>
main()
File \"/tmp/ansible_m2ieeq/ansible_module_setup.py\", line 126, in main
data = get_all_facts(module)
File \"/tmp/ansible_m2ieeq/ansible_modlib.zip/ansible/module_utils/facts.py\", line 3609, in get_all_facts
File \"/tmp/ansible_m2ieeq/ansible_modlib.zip/ansible/module_utils/facts.py\", line 3552, in ansible_facts
File \"/tmp/ansible_m2ieeq/ansible_modlib.zip/ansible/module_utils/facts.py\", line 2500, in populate
File \"/tmp/ansible_m2ieeq/ansible_modlib.zip/ansible/module_utils/facts.py\", line 2584, in get_interfaces_info
File \"/tmp/ansible_m2ieeq/ansible_modlib.zip/ansible/module_utils/facts.py\", line 2644, in parse_inet_line
socket.error: illegal IP address string passed to inet_aton
The cause is having aliases on lo like this:
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33184
inet 127.0.0.1 netmask 0xff000000
inet alias 127.1.1.1 netmask 0xff000000
So if the address is 'alias', we have to skip it.
* ANSIBLE_SSH_CONTROL_PATH_DIR option added
This removes the hardcoded value ( $HOME/.ansible/cp ) from ssh.py.
User is able to change the ControlPath directory ( the one that replaces %(directory)s ).
Fixes#18325
* Added config option in ansible.cfg
- Remove shebangs from:
- ini files
- unit tests
- module_utils
- plugins
- module_docs_fragments
- non-executable Makefiles
- Change non-modules from '/usr/bin/python' to '/usr/bin/env python'.
- Change '/bin/env' to '/usr/bin/env'.
Also removed main functions from unit tests (since they no longer
have a shebang) and fixed a python 3 compatibility issue with
update_bundled.py so it does not need to specify a python 2 shebang.
A script was added to check for unexpected shebangs in files.
This script is run during CI on Shippable.
If there is an intermittent network failure, we might be trying to reach
an URL multiple times. Without this patch, we would be re-adding the same
certificate to the OpenSSL default context multiple times.
Normally, this is no big issue, as OpenSSL will just silently ignore them,
after registering the error in its own error stack.
However, when python-cryptography initializes, it verifies that the current
error stack of the default OpenSSL context is empty, which it no longer is
due to us adding the certificates multiple times.
This results in cryptography throwing an Unknown OpenSSL Error with details:
OpenSSLErrorWithText(code=185057381L, lib=11, func=124, reason=101,
reason_text='error:0B07C065:x509 certificate routines:X509_STORE_add_cert:cert already in hash table'),
Signed-off-by: Patrick Uiterwijk <puiterwijk@redhat.com>
* Changes to be committed:
modified: lib/ansible/module_utils/nxos.py
- added configurable timeout to module paramaters
modified: lib/ansible/utils/module_docs_fragments/nxos.py
- added documentation for timeout
* Changes to be committed:
modified: ansible/module_utils/nxos.py
- added timeout option for nxapi transport and added documentation
- option works with CLI or NXAPI transport
* Changes to be committed:
modified: lib/ansible/utils/module_docs_fragments/nxos.py
- Changed per comments in PR 18074
* Changes to be committed:
modified: lib/ansible/module_utils/nxos.py
- added try/except block to test for timeout
* Changes to be committed:
modified: lib/ansible/module_utils/nxos.py
- tweaked timeout
if ANSIBLE_VAULT_PASSWORD_FILE is set, 'ansible-vault rekey myvault.yml'
will fail to prompt for the new vault password file, and will use
None.
Fix is to split out 'ask_vault_passwords' into 'ask_vault_passwords'
and 'ask_new_vault_passwords' to make the logic simpler. And then
make sure new_vault_pass is always set for 'rekey', and if not, then
call ask_new_vault_passwords() to set it.
ask_vault_passwords() would return values for vault_pass and new
vault_pass, and vault cli previously would not prompt for new_vault_pass
if there was a vault_pass set via a vault password file.
Fixes#18247
These ENV vars are:
- CLOUDSTACK_ZONE
- CLOUDSTACK_DOMAIN
- CLOUDSTACK_ACCOUNT
- CLOUDSTACK_PROJECT
help to DRY on every task, args still have precedence.
In order to support legacy plugins, the following two method signatures
are allowed for `CallbackBase.v2_playbook_on_start`:
def v2_playbook_on_start(self):
def v2_playbook_on_start(self, playbook):
Previously, the logic to handle this divergence checked to see if the
callback plugin being called supported an argument named `playbook`
in its `v2_playbook_on_start` method. This was fragile in a few ways:
- if a plugin author did not use the literal `playbook` to name their
method argument, their plugin would not be called correctly
- if a plugin author wrapped their `v2_playbook_on_start` method and
by doing so changed the argspec to no longer expose an argument
with that literal name, their plugin would not be called correctly
In order to continue to support both types of callback for backwards
compatibility while making the call more robust for plugin authors,
the logic can be reversed in order to have a positive check for the old
method signature instead of a positive check for the new one.
Signed-off-by: Steve Kuznetsov <skuznets@redhat.com>
When using the ansible-galaxy CLI to import roles, it's not possible to
specify an alternate_role_name, even though the REST API seems to allow
such a thing (at least on investigation of the interactions the web app
makes) That makes importing things like:
openstack/openstack-ansible-os_cloudkitty wind up with roles named
"openstack-ansible-os_cloudkitty" instead of "os_cloudkitty".
Also, the web ui is smart and imports
"openstack-infra/ansible-role-puppet" as openstack-infra.puppet ... but
the CLI imports it as openstack-infra.ansible-role-puppet. Add that
filtering as well.
Issue ansible/galaxy-issues:#185
Mitigate the effects of observing the ssh process still running
after seeing an EOF on stdout when using OpenSSH with
ControlPersist, since it does not close the stderr file descriptor
in this case.
As neon is derived from Ubuntu, ansible_os_family should have the value
"Debian" instead of "Neon". Add a test case for KDE neon and set
os_family correctly for it.
This limitation of python-3.4 mkstemp() is the final reason we made
python-3.5 our minimum version. Since we know about it, give a nice
error to the user with a hint that Python3.4 could be the issue.
Fixes#18160
