redict/tests/integration/redis-cli.tcl
Meir Shpilraien (Spielrein) 4db4b43417
Function Flags support (no-writes, no-cluster, allow-state, allow-oom) (#10066)
# Redis Functions Flags

Following the discussion on #10025 Added Functions Flags support.
The PR is divided to 2 sections:
* Add named argument support to `redis.register_function` API.
* Add support for function flags

## `redis.register_function` named argument support

The first part of the PR adds support for named argument on `redis.register_function`, example:
```
redis.register_function{
    function_name='f1',
    callback=function()
        return 'hello'
    end,
    description='some desc'
}
```

The positional arguments is also kept, which means that it still possible to write:
```
redis.register_function('f1', function() return 'hello' end)
```

But notice that it is no longer possible to pass the optional description argument on the positional
argument version. Positional argument was change to allow passing only the mandatory arguments
(function name and callback). To pass more arguments the user must use the named argument version.

As with positional arguments, the `function_name` and `callback` is mandatory and an error will be
raise if those are missing. Also, an error will be raise if an unknown argument name is given or the
arguments type is wrong.

Tests was added to verify the new syntax.

## Functions Flags

The second part of the PR is adding functions flags support.
Flags are given to Redis when the engine calls `functionLibCreateFunction`, supported flags are:

* `no-writes` - indicating the function perform no writes which means that it is OK to run it on:
   * read-only replica
   * Using FCALL_RO
   * If disk error detected
   
   It will not be possible to run a function in those situations unless the function turns on the `no-writes` flag

* `allow-oom` - indicate that its OK to run the function even if Redis is in OOM state, if the function will
  not turn on this flag it will not be possible to run it if OOM reached (even if the function declares `no-writes`
  and even if `fcall_ro` is used). If this flag is set, any command will be allow on OOM (even those that is
  marked with CMD_DENYOOM). The assumption is that this flag is for advance users that knows its
  meaning and understand what they are doing, and Redis trust them to not increase the memory usage.
  (e.g. it could be an INCR or a modification on an existing key, or a DEL command)

* `allow-state` - indicate that its OK to run the function on stale replica, in this case we will also make
  sure the function is only perform `stale` commands and raise an error if not.

* `no-cluster` - indicate to disallow running the function if cluster is enabled.

Default behaviure of functions (if no flags is given):
1. Allow functions to read and write
2. Do not run functions on OOM
3. Do not run functions on stale replica
4. Allow functions on cluster

### Lua API for functions flags

On Lua engine, it is possible to give functions flags as `flags` named argument:

```
redis.register_function{function_name='f1', callback=function() return 1 end, flags={'no-writes', 'allow-oom'}, description='description'}
```

The function flags argument must be a Lua table that contains all the requested flags, The following
will result in an error:
* Unknown flag
* Wrong flag type

Default behaviour is the same as if no flags are used.

Tests were added to verify all flags functionality

## Additional changes
* mark FCALL and FCALL_RO with CMD_STALE flag (unlike EVAL), so that they can run if the function was
  registered with the `allow-stale` flag.
* Verify `CMD_STALE` on `scriptCall` (`redis.call`), so it will not be possible to call commands from script while
  stale unless the command is marked with the `CMD_STALE` flags. so that even if the function is allowed while
  stale we do not allow it to bypass the `CMD_STALE` flag of commands.
* Flags section was added to `FUNCTION LIST` command to provide the set of flags for each function:
```
> FUNCTION list withcode
1)  1) "library_name"
    2) "test"
    3) "engine"
    4) "LUA"
    5) "description"
    6) (nil)
    7) "functions"
    8) 1) 1) "name"
          2) "f1"
          3) "description"
          4) (nil)
          5) "flags"
          6) (empty array)
    9) "library_code"
   10) "redis.register_function{function_name='f1', callback=function() return 1 end}"
```
* Added API to get Redis version from within a script, The redis version can be provided using:
   1. `redis.REDIS_VERSION` - string representation of the redis version in the format of MAJOR.MINOR.PATH
   2. `redis.REDIS_VERSION_NUM` - number representation of the redis version in the format of `0x00MMmmpp`
      (`MM` - major, `mm` - minor,  `pp` - patch). The number version can be used to check if version is greater or less 
      another version. The string version can be used to return to the user or print as logs.

   This new API is provided to eval scripts and functions, it also possible to use this API during functions loading phase.
2022-01-14 14:02:02 +02:00

481 lines
15 KiB
Tcl

source tests/support/cli.tcl
if {$::singledb} {
set ::dbnum 0
} else {
set ::dbnum 9
}
start_server {tags {"cli"}} {
proc open_cli {{opts ""} {infile ""}} {
if { $opts == "" } {
set opts "-n $::dbnum"
}
set ::env(TERM) dumb
set cmdline [rediscli [srv host] [srv port] $opts]
if {$infile ne ""} {
set cmdline "$cmdline < $infile"
set mode "r"
} else {
set mode "r+"
}
set fd [open "|$cmdline" $mode]
fconfigure $fd -buffering none
fconfigure $fd -blocking false
fconfigure $fd -translation binary
set _ $fd
}
proc close_cli {fd} {
close $fd
}
proc read_cli {fd} {
set ret [read $fd]
while {[string length $ret] == 0} {
after 10
set ret [read $fd]
}
# We may have a short read, try to read some more.
set empty_reads 0
while {$empty_reads < 5} {
set buf [read $fd]
if {[string length $buf] == 0} {
after 10
incr empty_reads
} else {
append ret $buf
set empty_reads 0
}
}
return $ret
}
proc write_cli {fd buf} {
puts $fd $buf
flush $fd
}
# Helpers to run tests in interactive mode
proc format_output {output} {
set _ [string trimright [regsub -all "\r" $output ""] "\n"]
}
proc run_command {fd cmd} {
write_cli $fd $cmd
set _ [format_output [read_cli $fd]]
}
proc test_interactive_cli {name code} {
set ::env(FAKETTY) 1
set fd [open_cli]
test "Interactive CLI: $name" $code
close_cli $fd
unset ::env(FAKETTY)
}
# Helpers to run tests where stdout is not a tty
proc write_tmpfile {contents} {
set tmp [tmpfile "cli"]
set tmpfd [open $tmp "w"]
puts -nonewline $tmpfd $contents
close $tmpfd
set _ $tmp
}
proc _run_cli {host port db opts args} {
set cmd [rediscli $host $port [list -n $db {*}$args]]
foreach {key value} $opts {
if {$key eq "pipe"} {
set cmd "sh -c \"$value | $cmd\""
}
if {$key eq "path"} {
set cmd "$cmd < $value"
}
}
set fd [open "|$cmd" "r"]
fconfigure $fd -buffering none
fconfigure $fd -translation binary
set resp [read $fd 1048576]
close $fd
set _ [format_output $resp]
}
proc run_cli {args} {
_run_cli [srv host] [srv port] $::dbnum {} {*}$args
}
proc run_cli_with_input_pipe {mode cmd args} {
if {$mode == "x" } {
_run_cli [srv host] [srv port] $::dbnum [list pipe $cmd] -x {*}$args
} elseif {$mode == "X"} {
_run_cli [srv host] [srv port] $::dbnum [list pipe $cmd] -X tag {*}$args
}
}
proc run_cli_with_input_file {mode path args} {
if {$mode == "x" } {
_run_cli [srv host] [srv port] $::dbnum [list path $path] -x {*}$args
} elseif {$mode == "X"} {
_run_cli [srv host] [srv port] $::dbnum [list path $path] -X tag {*}$args
}
}
proc run_cli_host_port_db {host port db args} {
_run_cli $host $port $db {} {*}$args
}
proc test_nontty_cli {name code} {
test "Non-interactive non-TTY CLI: $name" $code
}
# Helpers to run tests where stdout is a tty (fake it)
proc test_tty_cli {name code} {
set ::env(FAKETTY) 1
test "Non-interactive TTY CLI: $name" $code
unset ::env(FAKETTY)
}
test_interactive_cli "INFO response should be printed raw" {
set lines [split [run_command $fd info] "\n"]
foreach line $lines {
if {![regexp {^$|^#|^[^#:]+:} $line]} {
fail "Malformed info line: $line"
}
}
}
test_interactive_cli "Status reply" {
assert_equal "OK" [run_command $fd "set key foo"]
}
test_interactive_cli "Integer reply" {
assert_equal "(integer) 1" [run_command $fd "incr counter"]
}
test_interactive_cli "Bulk reply" {
r set key foo
assert_equal "\"foo\"" [run_command $fd "get key"]
}
test_interactive_cli "Multi-bulk reply" {
r rpush list foo
r rpush list bar
assert_equal "1) \"foo\"\n2) \"bar\"" [run_command $fd "lrange list 0 -1"]
}
test_interactive_cli "Parsing quotes" {
assert_equal "OK" [run_command $fd "set key \"bar\""]
assert_equal "bar" [r get key]
assert_equal "OK" [run_command $fd "set key \" bar \""]
assert_equal " bar " [r get key]
assert_equal "OK" [run_command $fd "set key \"\\\"bar\\\"\""]
assert_equal "\"bar\"" [r get key]
assert_equal "OK" [run_command $fd "set key \"\tbar\t\""]
assert_equal "\tbar\t" [r get key]
# invalid quotation
assert_equal "Invalid argument(s)" [run_command $fd "get \"\"key"]
assert_equal "Invalid argument(s)" [run_command $fd "get \"key\"x"]
# quotes after the argument are weird, but should be allowed
assert_equal "OK" [run_command $fd "set key\"\" bar"]
assert_equal "bar" [r get key]
}
test_tty_cli "Status reply" {
assert_equal "OK" [run_cli set key bar]
assert_equal "bar" [r get key]
}
test_tty_cli "Integer reply" {
r del counter
assert_equal "(integer) 1" [run_cli incr counter]
}
test_tty_cli "Bulk reply" {
r set key "tab\tnewline\n"
assert_equal "\"tab\\tnewline\\n\"" [run_cli get key]
}
test_tty_cli "Multi-bulk reply" {
r del list
r rpush list foo
r rpush list bar
assert_equal "1) \"foo\"\n2) \"bar\"" [run_cli lrange list 0 -1]
}
test_tty_cli "Read last argument from pipe" {
assert_equal "OK" [run_cli_with_input_pipe x "echo foo" set key]
assert_equal "foo\n" [r get key]
assert_equal "OK" [run_cli_with_input_pipe X "echo foo" set key2 tag]
assert_equal "foo\n" [r get key2]
}
test_tty_cli "Read last argument from file" {
set tmpfile [write_tmpfile "from file"]
assert_equal "OK" [run_cli_with_input_file x $tmpfile set key]
assert_equal "from file" [r get key]
assert_equal "OK" [run_cli_with_input_file X $tmpfile set key2 tag]
assert_equal "from file" [r get key2]
file delete $tmpfile
}
test_nontty_cli "Status reply" {
assert_equal "OK" [run_cli set key bar]
assert_equal "bar" [r get key]
}
test_nontty_cli "Integer reply" {
r del counter
assert_equal "1" [run_cli incr counter]
}
test_nontty_cli "Bulk reply" {
r set key "tab\tnewline\n"
assert_equal "tab\tnewline" [run_cli get key]
}
test_nontty_cli "Multi-bulk reply" {
r del list
r rpush list foo
r rpush list bar
assert_equal "foo\nbar" [run_cli lrange list 0 -1]
}
if {!$::tls} { ;# fake_redis_node doesn't support TLS
test_nontty_cli "ASK redirect test" {
# Set up two fake Redis nodes.
set tclsh [info nameofexecutable]
set script "tests/helpers/fake_redis_node.tcl"
set port1 [find_available_port $::baseport $::portcount]
set port2 [find_available_port $::baseport $::portcount]
set p1 [exec $tclsh $script $port1 \
"SET foo bar" "-ASK 12182 127.0.0.1:$port2" &]
set p2 [exec $tclsh $script $port2 \
"ASKING" "+OK" \
"SET foo bar" "+OK" &]
# Make sure both fake nodes have started listening
wait_for_condition 50 50 {
[catch {close [socket "127.0.0.1" $port1]}] == 0 && \
[catch {close [socket "127.0.0.1" $port2]}] == 0
} else {
fail "Failed to start fake Redis nodes"
}
# Run the cli
assert_equal "OK" [run_cli_host_port_db "127.0.0.1" $port1 0 -c SET foo bar]
}
}
test_nontty_cli "Quoted input arguments" {
r set "\x00\x00" "value"
assert_equal "value" [run_cli --quoted-input get {"\x00\x00"}]
}
test_nontty_cli "No accidental unquoting of input arguments" {
run_cli --quoted-input set {"\x41\x41"} quoted-val
run_cli set {"\x41\x41"} unquoted-val
assert_equal "quoted-val" [r get AA]
assert_equal "unquoted-val" [r get {"\x41\x41"}]
}
test_nontty_cli "Invalid quoted input arguments" {
catch {run_cli --quoted-input set {"Unterminated}} err
assert_match {*exited abnormally*} $err
# A single arg that unquotes to two arguments is also not expected
catch {run_cli --quoted-input set {"arg1" "arg2"}} err
assert_match {*exited abnormally*} $err
}
test_nontty_cli "Read last argument from pipe" {
assert_equal "OK" [run_cli_with_input_pipe x "echo foo" set key]
assert_equal "foo\n" [r get key]
assert_equal "OK" [run_cli_with_input_pipe X "echo foo" set key2 tag]
assert_equal "foo\n" [r get key2]
}
test_nontty_cli "Read last argument from file" {
set tmpfile [write_tmpfile "from file"]
assert_equal "OK" [run_cli_with_input_file x $tmpfile set key]
assert_equal "from file" [r get key]
assert_equal "OK" [run_cli_with_input_file X $tmpfile set key2 tag]
assert_equal "from file" [r get key2]
file delete $tmpfile
}
proc test_redis_cli_rdb_dump {functions_only} {
r flushdb
r function flush
set dir [lindex [r config get dir] 1]
assert_equal "OK" [r debug populate 100000 key 1000]
assert_equal "OK" [r function load lua lib1 "redis.register_function('func1', function() return 123 end)"]
if {$functions_only} {
set args "--functions-rdb $dir/cli.rdb"
} else {
set args "--rdb $dir/cli.rdb"
}
catch {run_cli {*}$args} output
assert_match {*Transfer finished with success*} $output
file delete "$dir/dump.rdb"
file rename "$dir/cli.rdb" "$dir/dump.rdb"
assert_equal "OK" [r set should-not-exist 1]
assert_equal "OK" [r function load lua should_not_exist_func "redis.register_function('should_not_exist_func', function() return 456 end)"]
assert_equal "OK" [r debug reload nosave]
assert_equal {} [r get should-not-exist]
assert_equal {{library_name lib1 engine LUA description {} functions {{name func1 description {} flags {}}}}} [r function list]
if {$functions_only} {
assert_equal 0 [r dbsize]
} else {
assert_equal 100000 [r dbsize]
}
}
foreach {functions_only} {no yes} {
test "Dumping an RDB - functions only: $functions_only" {
# Disk-based master
assert_match "OK" [r config set repl-diskless-sync no]
test_redis_cli_rdb_dump $functions_only
# Disk-less master
assert_match "OK" [r config set repl-diskless-sync yes]
assert_match "OK" [r config set repl-diskless-sync-delay 0]
test_redis_cli_rdb_dump $functions_only
} {} {needs:repl needs:debug}
} ;# foreach functions_only
test "Scan mode" {
r flushdb
populate 1000 key: 1
# basic use
assert_equal 1000 [llength [split [run_cli --scan]]]
# pattern
assert_equal {key:2} [run_cli --scan --pattern "*:2"]
# pattern matching with a quoted string
assert_equal {key:2} [run_cli --scan --quoted-pattern {"*:\x32"}]
}
proc test_redis_cli_repl {} {
set fd [open_cli "--replica"]
wait_for_condition 500 100 {
[string match {*slave0:*state=online*} [r info]]
} else {
fail "redis-cli --replica did not connect"
}
for {set i 0} {$i < 100} {incr i} {
r set test-key test-value-$i
}
wait_for_condition 500 100 {
[string match {*test-value-99*} [read_cli $fd]]
} else {
fail "redis-cli --replica didn't read commands"
}
fconfigure $fd -blocking true
r client kill type slave
catch { close_cli $fd } err
assert_match {*Server closed the connection*} $err
}
test "Connecting as a replica" {
# Disk-based master
assert_match "OK" [r config set repl-diskless-sync no]
test_redis_cli_repl
# Disk-less master
assert_match "OK" [r config set repl-diskless-sync yes]
assert_match "OK" [r config set repl-diskless-sync-delay 0]
test_redis_cli_repl
} {} {needs:repl}
test "Piping raw protocol" {
set cmds [tmpfile "cli_cmds"]
set cmds_fd [open $cmds "w"]
set cmds_count 2101
if {!$::singledb} {
puts $cmds_fd [formatCommand select 9]
incr cmds_count
}
puts $cmds_fd [formatCommand del test-counter]
for {set i 0} {$i < 1000} {incr i} {
puts $cmds_fd [formatCommand incr test-counter]
puts $cmds_fd [formatCommand set large-key [string repeat "x" 20000]]
}
for {set i 0} {$i < 100} {incr i} {
puts $cmds_fd [formatCommand set very-large-key [string repeat "x" 512000]]
}
close $cmds_fd
set cli_fd [open_cli "--pipe" $cmds]
fconfigure $cli_fd -blocking true
set output [read_cli $cli_fd]
assert_equal {1000} [r get test-counter]
assert_match "*All data transferred*errors: 0*replies: ${cmds_count}*" $output
file delete $cmds
}
test "Options -X with illegal argument" {
assert_error "*-x and -X are mutually exclusive*" {run_cli -x -X tag}
assert_error "*Unrecognized option or bad number*" {run_cli -X}
assert_error "*tag not match*" {run_cli_with_input_pipe X "echo foo" set key wrong_tag}
}
test "DUMP RESTORE with -x option" {
set cmdline [rediscli [srv host] [srv port]]
exec {*}$cmdline DEL set new_set
exec {*}$cmdline SADD set 1 2 3 4 5 6
assert_equal 6 [exec {*}$cmdline SCARD set]
assert_equal "OK" [exec {*}$cmdline -D "" --raw DUMP set | \
{*}$cmdline -x RESTORE new_set 0]
assert_equal 6 [exec {*}$cmdline SCARD new_set]
assert_equal "1\n2\n3\n4\n5\n6" [exec {*}$cmdline SMEMBERS new_set]
}
test "DUMP RESTORE with -X option" {
set cmdline [rediscli [srv host] [srv port]]
exec {*}$cmdline DEL zset new_zset
exec {*}$cmdline ZADD zset 1 a 2 b 3 c
assert_equal 3 [exec {*}$cmdline ZCARD zset]
assert_equal "OK" [exec {*}$cmdline -D "" --raw DUMP zset | \
{*}$cmdline -X dump_tag RESTORE new_zset 0 dump_tag REPLACE]
assert_equal 3 [exec {*}$cmdline ZCARD new_zset]
assert_equal "a\n1\nb\n2\nc\n3" [exec {*}$cmdline ZRANGE new_zset 0 -1 WITHSCORES]
}
}