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Added tests for the "large_header_buffer_size" and
"large_header_buffers" configuration options.
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This is an extension to the previous commit, which made
large_header_buffer_size a valid configuration setting.
This commit makes a related value, large_header_buffers, a valid
configuration setting.
While large_header_buffer_size effectively limits the maximum size of
any single header (although unit will try to pack multiple headers into
a buffer if they wholly fit).
large_header_buffers limits how many of these 'large' buffers are
available. It makes sense to also allow this to be user set.
large_header_buffers is already set by the configuration system in
nxt_router.c it just isn't set as a valid config option in
nxt_conf_validation.c
With this change users can set this option in their config if required
by the following
"settings": {
"http": {
"large_header_buffers": 8
}
},
It retains its default value of 4 if this is not set.
NOTE: This is being released as undocumented and subject to change as it
exposes internal workings of unit.
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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@JanMikes and @tagur87 on GitHub both reported issues with long URLs
that were exceeding the 8192 byte large_header_buffer_size setting,
which resulted in a HTTP 431 error (Request Header Fields Too Large).
This can be resolved in the code by updating the following line in
src/nxt_router.c::nxt_router_conf_create()
skcf->large_header_buffer_size = 8192;
However, requiring users to modify unit and install custom versions is
less than ideal. We could increase the value, but to what?
This commit takes the option of allowing the user to set this option in
their config by making large_header_buffer_size a valid configuration
setting.
large_header_buffer_size is already set by the configuration system in
nxt_router.c it just isn't set as a valid config option in
nxt_conf_validation.c
With this change users can set this option in their config if required
by the following
"settings": {
"http": {
"large_header_buffer_size": 16384
}
},
It retains its default value of 8192 bytes if this is not set.
With this commit, without the above setting or too low a value, with a
long URL you get a 431 error. With the above setting set to a large
enough value, the request is successful.
NOTE: This setting really determines the maximum size of any single
header _value_. Also, unit will try and place multiple values
into a buffer _if_ they fully fit.
NOTE: This is being released as undocumented and subject to change as it
exposes internal workings of unit.
Closes: <https://github.com/nginx/unit/issues/521>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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Hide expected alerts by default.
Silence succesfull "go build" information.
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This hooks the cgroup support up to the config system so it can actually
be used.
To make use of this in unit a new "cgroup" section has been added to the
isolation configuration.
e.g
"applications": {
"python": {
"type": "python",
"processes": 5,
"path": "/opt/unit/unit-cgroup-test/",
"module": "app",
"isolation": {
"cgroup": {
"path": "app/python"
}
}
}
}
Now there are two ways to specify the path, relative, like the above
(without a leading '/') and absolute (with a leading '/').
In the above case the "python" application is placed into its own cgroup
under CGROUP_ROOT/<main unit process cgroup>/app/python. Whereas if you
specified say
"path": "/unit/app/python"
Then the python application would be placed under
CGROUP_ROOT/unit/app/python
The first option allows you to easily take advantage of any resource
limits that have already been configured for unit.
With the second method (absolute pathname) if you know of an already
existing cgroup where you'd like to place it, you can, e.g
"path": "/system.slice/unit/python"
Where system.slice has already been created by systemd and may already
have some overall system limits applied which would also apply to unit.
Limits apply down the hierarchy and lower groups can't exceed the
previous group limits.
So what does this actually look like? Lets take the unit-calculator
application[0] and have each of its applications placed into their own
cgroup. If we give each application a new section like
"isolation": {
"cgroup": {
"path": "/unit/unit-calculator/add"
}
}
changing the path for each one, we can visualise the result with the
systemd-cgls command, e.g
│ └─session-5.scope (#4561)
│ ├─ 6667 sshd: andrew [priv]
│ ├─ 6684 sshd: andrew@pts/0
│ ├─ 6685 -bash
│ ├─ 12632 unit: main v1.28.0 [/opt/unit/sbin/unitd --control 127.0.0.1:808>
│ ├─ 12634 unit: controller
│ ├─ 12635 unit: router
│ ├─ 13550 systemd-cgls
│ └─ 13551 less
├─unit (#4759)
│ └─unit-calculator (#5037)
│ ├─subtract (#5069)
│ │ ├─ 12650 unit: "subtract" prototype
│ │ └─ 12651 unit: "subtract" application
│ ├─multiply (#5085)
│ │ ├─ 12653 unit: "multiply" prototype
│ │ └─ 12654 unit: "multiply" application
│ ├─divide (#5101)
│ │ ├─ 12671 unit: "divide" prototype
│ │ └─ 12672 node divide.js
│ ├─sqroot (#5117)
│ │ ├─ 12679 unit: "sqroot" prototype
│ │ └─ 12680 /home/andrew/src/unit-calculator/sqroot/sqroot
│ └─add (#5053)
│ ├─ 12648 unit: "add" prototype
│ └─ 12649 unit: "add" application
We used an absolute path so the cgroups will be created relative to the
main cgroupfs mount, e.g /sys/fs/cgroup
We can see that the main unit processes are in the same cgroup as the
shell from where they were started, by default child process are placed
into the same cgroup as the parent.
Then we can see that each application has been placed into its own
cgroup under /sys/fs/cgroup
Taking another example of a simple 5 process python application, with
"isolation": {
"cgroup": {
"path": "app/python"
}
}
Here we have specified a relative path and thus the python application
will be placed below the existing cgroup that contains the main unit
process. E.g
│ │ │ ├─app-glib-cinnamon\x2dcustom\x2dlauncher\x2d3-43951.scope (#90951)
│ │ │ │ ├─ 988 unit: main v1.28.0 [/opt/unit/sbin/unitd --no-daemon]
│ │ │ │ ├─ 990 unit: controller
│ │ │ │ ├─ 991 unit: router
│ │ │ │ ├─ 43951 xterm -bg rgb:20/20/20 -fg white -fa DejaVu Sans Mono
│ │ │ │ ├─ 43956 bash
│ │ │ │ ├─ 58828 sudo -i
│ │ │ │ ├─ 58831 -bash
│ │ │ │ └─app (#107351)
│ │ │ │ └─python (#107367)
│ │ │ │ ├─ 992 unit: "python" prototype
│ │ │ │ ├─ 993 unit: "python" application
│ │ │ │ ├─ 994 unit: "python" application
│ │ │ │ ├─ 995 unit: "python" application
│ │ │ │ ├─ 996 unit: "python" application
│ │ │ │ └─ 997 unit: "python" application
[0]: <https://github.com/lcrilly/unit-calculator>
Reviewed-by: Alejandro Colomar <alx@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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This commit enables the building of the cgroup code. This is only built
when the cgroupv2 filesystem is found.
If cgroupv2 support is found then
cgroupv2: .................. YES
will be printed by ./configure
Reviewed-by: Alejandro Colomar <alx@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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This commit hooks into the cgroup infrastructure added in the previous
commit to create per-application cgroups.
It does this by adding each "prototype process" into its own cgroup,
then each child process inherits its parents cgroup.
If we fail to create a cgroup we simply fail the process. This behaviour
may get enhanced in the future.
This won't actually do anything yet. Subsequent commits will hook this
up to the build and config systems.
Reviewed-by: Alejandro Colomar <alx@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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Firstly, this is not to be confused with CLONE_NEWCGROUP which unit
already supports and is related to namespaces. To re-cap, namespaces
allow processes to have different views of various parts of the system
such as filesystem mounts, networking, hostname etc.
Whereas cgroup[0] is a Linux kernel facility for collecting a bunch of
processes together to perform some task on the group as a whole, for
example to implement resource limits.
There are two parts to cgroup, the core part of organising processes
into a hierarchy and the controllers which are responsible for enforcing
resource limits etc.
There are currently two versions of the cgroup sub-system, the original
cgroup and a version 2[1] introduced in 3.16 (August 2014) and marked
stable in 4.5 (March 2016).
This commit supports the cgroup V2 API and implements the ability to
place applications into their own cgroup on a per-application basis.
You can put them each into their own cgroup or you can group some
together. The ability to set resource limits can easily be added in
future.
The initial use case of this would be to aid in observability of unit
applications which becomes much easier if you can just monitor them on a
per cgroup basis.
One thing to note about cgroup, is that unlike namespaces which are
controlled via system calls such as clone(2) and unshare(2), cgroups are
setup and controlled through the cgroupfs pseudo-filesystem.
cgroup is Linux only and this support will only be enabled if configure
finds the cgroup2 filesystem mount, e.g
cgroup2 on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,seclabel,nsdelegate,memory_recursiveprot)
The cgroups are removed on shutdown or as required on reconfiguration.
This commit just adds the basic infrastructure for using cgroups within
unit. Subsequent commits will wire up this support.
It supports creating cgroups relative to the main cgroup root and also
below the cgroup of the main unit process.
[0]: <https://man7.org/linux/man-pages/man7/cgroups.7.html>
[1]: <https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html>
Cc: Alejandro Colomar <alx@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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Add simple wrapper functions for fopen(3) and fclose(3) that are
somewhat akin to the nxt_file_open() and nxt_file_close() wrappers that
log errors.
Suggested-by: Alejandro Colomar <alx@nginx.com>
Reviewed-by: Alejandro Colomar <alx@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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Andrei reported an issue with building unit when using '-O0' with GCC
producing the following compiler errors
cc -c -pipe -fPIC -fvisibility=hidden -O -W -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wmissing-prototypes -Werror -g -O0 -I src -I build \
\
\
-o build/src/nxt_unit.o \
-MMD -MF build/src/nxt_unit.dep -MT build/src/nxt_unit.o \
src/nxt_unit.c
src/nxt_unit.c: In function ‘nxt_unit_log’:
src/nxt_unit.c:6601:9: error: ‘msg’ may be used uninitialized [-Werror=maybe-uninitialized]
6601 | p = nxt_unit_snprint_prefix(p, end, pid, level);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/nxt_unit.c:6682:1: note: by argument 2 of type ‘const char *’ to ‘nxt_unit_snprint_prefix’ declared here
6682 | nxt_unit_snprint_prefix(char *p, const char *end, pid_t pid, int level)
| ^~~~~~~~~~~~~~~~~~~~~~~
src/nxt_unit.c:6582:22: note: ‘msg’ declared here
6582 | char msg[NXT_MAX_ERROR_STR], *p, *end;
| ^~~
src/nxt_unit.c: In function ‘nxt_unit_req_log’:
src/nxt_unit.c:6645:9: error: ‘msg’ may be used uninitialized [-Werror=maybe-uninitialized]
6645 | p = nxt_unit_snprint_prefix(p, end, pid, level);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/nxt_unit.c:6682:1: note: by argument 2 of type ‘const char *’ to ‘nxt_unit_snprint_prefix’ declared here
6682 | nxt_unit_snprint_prefix(char *p, const char *end, pid_t pid, int level)
| ^~~~~~~~~~~~~~~~~~~~~~~
src/nxt_unit.c:6625:35: note: ‘msg’ declared here
6625 | char msg[NXT_MAX_ERROR_STR], *p, *end;
| ^~~
cc1: all warnings being treated as errors
The above was reproduced with
$ ./configure --cc-opt=-O0 && ./configure python && make -j4
This warning doesn't happen on clang (15.0.4) or GCC (8.3) and seems to
have been introduced in GCC 11. The above is from GCC (12.2.1, Fedora
37).
The trigger of this GCC issue is actually part of a commit I introduced
a few months back to constify some function parameters and it seems the
consensus for how to resolve this problem is to simply remove the const
qualifier from the *end parameter to nxt_unit_snprint_prefix().
Reported-by: Andrei Zeliankou <zelenkov@nginx.com>
Link: <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100417>
Link: <https://github.com/samtools/htslib/pull/1285>
Link: <https://gcc.gnu.org/gcc-11/changes.html>
Fixes: 4418f99 ("Constified numerous function parameters.")
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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Starting from Node.js v18.6.0 return value from all hooks must have
"shortCircuit: true" option specified. For more information see:
https://github.com/nodejs/node/commit/10bcad5c6e
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Python 3.8 added a new Python initialisation configuration API[0].
Python 3.11 marked the old API as deprecated resulting in the following
compiler warnings which we treat as errors, failing the build
src/python/nxt_python.c: In function ‘nxt_python_start’:
src/python/nxt_python.c:130:13: error: ‘Py_SetProgramName’ is deprecated [-Werror=deprecated-declarations]
130 | Py_SetProgramName(nxt_py_home);
| ^~~~~~~~~~~~~~~~~
In file included from /opt/python-3.11/include/python3.11/Python.h:94,
from src/python/nxt_python.c:7:
/opt/python-3.11/include/python3.11/pylifecycle.h:37:38: note: declared here
37 | Py_DEPRECATED(3.11) PyAPI_FUNC(void) Py_SetProgramName(const wchar_t *);
| ^~~~~~~~~~~~~~~~~
src/python/nxt_python.c:134:13: error: ‘Py_SetPythonHome’ is deprecated [-Werror=deprecated-declarations]
134 | Py_SetPythonHome(nxt_py_home);
| ^~~~~~~~~~~~~~~~
/opt/python-3.11/include/python3.11/pylifecycle.h:40:38: note: declared here
40 | Py_DEPRECATED(3.11) PyAPI_FUNC(void) Py_SetPythonHome(const wchar_t *);
| ^~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
We actually have a few config scenarios: Python < 3, Python >= 3.0 < 3.8
and for Python 3 we have two configs where we select one based on
virtual environment setup.
Factor out the Python 3 config initialisation into its own function. We
actually create two functions, one for Python 3.8+ and one for older
Python 3. We pick the right function to use at build time.
The new API also has error checking (where the old API doesn't) which we
handle.
[0]: https://peps.python.org/pep-0587/
Closes: <https://github.com/nginx/unit/issues/710>
[ Andrew: Expanded upon patch from @sandeep-gh ]
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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It's for the introduction of njs support.
For each option that supports native variable and JS template literals introduced next,
it's unified as template string.
No functional changes.
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Downloaded from <https://unit.nginx.org/_downloads/setup-unit.sh>.
Acked-by: Artem Konev <a.konev@f5.com>
Acked-by: Konstantin Pavlov <thresh@nginx.com>
Signed-off-by: Alejandro Colomar <alx@nginx.com>
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Unit parsed the case of "$uri$$host" into unknown variables.
This commit makes it invalid variable instead.
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This fixes an issue addressed in 651f5a37f5b8 on FreeBSD 12.
The problem manifested itself as:
configuring Ruby module
checking for -fdeclspec ... found
checking for Ruby library ... not found
checking for Ruby library in /usr/local/lib ... not found
./configure: error: no Ruby found.
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Splitting `nxt_python_add_sptr` into several functions will make future
additions easier.
Signed-off-by: Alejandro Colomar <alx@nginx.com>
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Signed-off-by: Alejandro Colomar <alx@nginx.com>
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This allows us to update base or single modules packages without
updating the whole set.
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Migration of "share" behaviour was dropped after b57b4749b993.
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Now version output evaluates only once.
OpenSSL checks more carefully.
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Refs: https://github.com/nginx/unit/issues/778
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The casts are unnecessary, since memchr(3)'s argument is 'const void *'.
It might have been necessary in the times of K&R, where 'void *' didn't
exist. Nowadays, it's unnecessary, and _very_ unsafe, since casts can
hide all classes of bugs by silencing most compiler warnings.
The changes from nxt_memchr() to memchr(3) were scripted:
$ find src/ -type f \
| grep '\.[ch]$' \
| xargs sed -i 's/nxt_memchr/memchr/'
Reviewed-by: Andrew Clayton <a.clayton@nginx.com>
Signed-off-by: Alejandro Colomar <alx@nginx.com>
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The casts are unnecessary, since memcmp(3)'s arguments are 'void *'.
It might have been necessary in the times of K&R, where 'void *' didn't
exist. Nowadays, it's unnecessary, and _very_ unsafe, since casts can
hide all classes of bugs by silencing most compiler warnings.
The changes from nxt_memcmp() to memcmp(3) were scripted:
$ find src/ -type f \
| grep '\.[ch]$' \
| xargs sed -i 's/nxt_memcmp/memcmp/'
Reviewed-by: Andrew Clayton <a.clayton@nginx.com>
Signed-off-by: Alejandro Colomar <alx@nginx.com>
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Both @lucatacconi & @mwoodpatrick reported what appears to be the same
issue on GitHub. Namely that when using the PHP language module and
trying to access a URL that is a directory but without specifying the
trailing '/', they were getting a '503 Service Unavailable' error.
Note: This is when _not_ using the 'script' option.
E.g with the following config
{
"listeners": {
"[::1]:8080": {
"pass": "applications/php"
}
},
"applications": {
"php": {
"type": "php",
"root": "/var/tmp/unit-php"
}
}
}
and with a directory path of /var/tmp/unit-php/foo containing an
index.php, you would see the following
$ curl http://localhost/foo
<title>Error 503</title>
Error 503
However
$ curl http://localhost/foo/
would work and serve up the index.php
This commit fixes the above so you get the desired behaviour without
specifying the trailing '/' by doing the following
1] If the URL doesn't end in .php and doesn't have a trailing '/'
then check if the requested path is a directory.
2) If it is a directory then create a 301 re-direct pointing to it.
This matches the behaviour of the likes of nginx, Apache and
lighttpd.
This also matches the behaviour of the "share" action in Unit.
This doesn't effect the behaviour of the 'script' option which bypasses
the nxt_php_dynamic_request() function.
This also adds a couple of tests to test/test_php_application.py to
ensure this continues to work.
Closes: <https://github.com/nginx/unit/issues/717>
Closes: <https://github.com/nginx/unit/issues/753>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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Future releases of GCC will render function definitions like
func()
invalid by default. See the previous commit 09f88c9 ("Fixed main()
prototypes in auto tests.") for details.
Such functions should be defined like
func(void)
This is a good thing to do regardless of the upcoming GCC changes.
Reviewed-by: Alejandro Colomar <alx@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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Future releases of GCC are planning to remove[0] default support for
some old features that were removed from C99 but GCC still accepts.
We can test for these changes by using the following -Werror=
directives
-Werror=implicit-int
-Werror=implicit-function-declaration
-Werror=int-conversion
-Werror=strict-prototypes
-Werror=old-style-definition
Doing so revealed an issue with the auto/ tests in that the test
programs always define main as
int main()
rather than
int main(void)
which results in a bunch of errors like
build/autotest.c:3:23: error: function declaration isn't a prototype [-Werror=strict-prototypes]
3 | int main() {
| ^~~~
build/autotest.c: In function 'main':
build/autotest.c:3:23: error: old-style function definition [-Werror=old-style-definition]
The fix was easy, it only required fixing the main prototype with
find -type f -exec sed -i 's/int main() {/int main(void) {/g' {} \;
Regardless of these upcoming GCC changes, this is probably a good thing
to do anyway for correctness.
[0]: https://fedoraproject.org/wiki/Changes/PortingToModernC
Link: <https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/message/CJXKTLXJUPZ4F2C2VQOTNMEA5JAUPMBD/>
Link: <https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/message/6SGHPHPAXKCVJ6PUZ57WVDQ5TDBVIRMF/>
Reviewed-by: Alejandro Colomar <alx@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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Some distros provide it in /bin/sed and others in both /bin/sed
and /usr/bin/sed. Use the more available one.
Reported-by: Konstantin Pavlov <thresh@nginx.com>
Fixes: ac64ffde5718 "Improved readability of <docker-entrypoint.sh>."
Signed-off-by: Alejandro Colomar <alx@nginx.com>
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Cc: Konstantin Pavlov <thresh@nginx.com>
Signed-off-by: Alejandro Colomar <alx@nginx.com>
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Git can be told to apply language-specific rules when generating diffs.
Enable this for C source code files (*.c and *.h) so that function names
are printed right. Specifically, doing so prevents "git diff" from
mistakenly considering unindented goto labels as function names.
This has the same effect as adding
[diff "default"]
xfuncname = "^[[:alpha:]$_].*[^:]$"
to your git config file.
e.g get
@@ -10,7 +10,7 @@ int main(void)
instead of
@@ -10,7 +10,7 @@ again:
This makes use of the gitattributes(5) infrastructure.
Link: <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=218dd85887da3d7d08119de18e9d325fcf30d7a4>
Link: <https://git.kernel.org/pub/scm/git/git.git/commit/?id=e82675a040d559c56be54255901138a979eeec21>
Reviewed-by: Alejandro Colomar <alx@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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Link: <https://www.openssl.org/docs/man3.0/man7/migration_guide.html>
Cc: Andy Postnikov <apostnikov@gmail.com>
Cc: Andrew Clayton <a.clayton@nginx.com>
Signed-off-by: Remi Collet <remi@remirepo.net>
Signed-off-by: Alejandro Colomar <alx@nginx.com>
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If we don't call SSL_CTX_set_cipher_list(), then it uses the
system's default.
Link: <https://fedoraproject.org/wiki/Changes/CryptoPolicy>
Link: <https://docs.fedoraproject.org/en-US/packaging-guidelines/CryptoPolicies/>
Link: <https://www.redhat.com/en/blog/consistent-security-crypto-policies-red-hat-enterprise-linux-8>
Signed-off-by: Remi Collet <remi@remirepo.net>
Acked-by: Andrei Belov <defan@nginx.com>
[ alx: add changelog and tweak commit message ]
Signed-off-by: Alejandro Colomar <alx@nginx.com>
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'install -d' has an issue compared to 'mkdir -p': it doesn't
respect existing directories. It will set the ownership, file
mode, and SELinux contexts (and any other property that would be
set by install(1) to a newly-created directory), overwriting any
existing properties of the existing directory.
'mkdir -p' doesn't have this issue: it is a no-op if the
directory exists. However, it's not an ideal solution either,
since it can't be used to set the properties (owner, mode, ...) of
a newly-created directory.
Therefore, the best solution is to use install(1), but only after
making sure that the directory doesn't exist with test(1).
Reported-by: Andrew Clayton <a.clayton@nginx.com>
Reported-by: Alejandro Colomar <alx@nginx.com>
Closes: <https://github.com/nginx/unit/issues/769>
Signed-off-by: Alejandro Colomar <alx@nginx.com>
Tested-by: Andrew Clayton <a.clayton@nginx.com>
Reviewed-by: Andrew Clayton <a.clayton@nginx.com>
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This commit removed the $uri auto-append for the "share" option
introduced in rev be6409cdb028.
The main reason is that it causes problems when preparing Unit configurations
to be loaded at startup from the state directory. E.g. Docker. A valid conf.json
file with $uri references will end up with $uri$uri due to the auto-append.
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Reported-by: Andrew Clayton <a.clayton@nginx.com>
Signed-off-by: Remi Collet <remi@remirepo.net>
Reviewed-by: Andrew Clayton <a.clayton@nginx.com>
Signed-off-by: Alejandro Colomar <alx@nginx.com>
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