| #!/usr/bin/perl |
| |
| # (C) Nginx, Inc. |
| |
| # Tests for upstream module with max_conns feature. |
| |
| ############################################################################### |
| |
| use warnings; |
| use strict; |
| |
| use Test::More; |
| |
| use IO::Select; |
| |
| BEGIN { use FindBin; chdir($FindBin::Bin); } |
| |
| use lib 'lib'; |
| use Test::Nginx qw/ :DEFAULT http_end /; |
| |
| ############################################################################### |
| |
| select STDERR; $| = 1; |
| select STDOUT; $| = 1; |
| |
| my $t = Test::Nginx->new()->has(qw/http proxy rewrite upstream_least_conn/) |
| ->has(qw/upstream_ip_hash upstream_hash/)->plan(16); |
| |
| $t->write_file_expand('nginx.conf', <<'EOF'); |
| |
| %%TEST_GLOBALS%% |
| |
| daemon off; |
| |
| events { |
| } |
| |
| http { |
| %%TEST_GLOBALS_HTTP%% |
| |
| upstream u_unlim { |
| server 127.0.0.1:8081 max_conns=0; |
| server 127.0.0.1:8082; |
| } |
| upstream u_lim { |
| server 127.0.0.1:8081 max_conns=3; |
| } |
| |
| upstream u_backup { |
| server 127.0.0.1:8081 max_conns=2; |
| server 127.0.0.1:8082 backup; |
| } |
| upstream u_backup_lim { |
| server 127.0.0.1:8081 max_conns=2; |
| server 127.0.0.1:8082 backup max_conns=3; |
| } |
| |
| upstream u_two { |
| server 127.0.0.1:8081 max_conns=1; |
| server 127.0.0.1:8082 max_conns=1; |
| } |
| upstream u_some { |
| server 127.0.0.1:8081 max_conns=1; |
| server 127.0.0.1:8082; |
| } |
| upstream u_many { |
| server 127.0.0.1:8081 max_conns=1; |
| server 127.0.0.1:8081 max_conns=1; |
| server 127.0.0.1:8082; |
| } |
| |
| upstream u_weight { |
| server 127.0.0.1:8081 weight=2 max_conns=1; |
| server 127.0.0.1:8082; |
| } |
| |
| upstream u_pnu { |
| # special server to force next upstream |
| server 127.0.0.1:8084; |
| |
| server 127.0.0.1:8081 max_conns=1; |
| server 127.0.0.1:8082 max_conns=2; |
| } |
| |
| upstream u_lc { |
| least_conn; |
| server 127.0.0.1:8081 max_conns=1; |
| server 127.0.0.1:8082; |
| } |
| upstream u_lc_backup { |
| least_conn; |
| server 127.0.0.1:8081 max_conns=2; |
| server 127.0.0.1:8082 backup; |
| } |
| upstream u_lc_backup_lim { |
| least_conn; |
| server 127.0.0.1:8081 max_conns=2; |
| server 127.0.0.1:8082 backup max_conns=3; |
| } |
| |
| upstream u_ih { |
| ip_hash; |
| server 127.0.0.1:8081 max_conns=1; |
| server 127.0.0.1:8082 max_conns=2; |
| } |
| |
| upstream u_hash { |
| hash $remote_addr; |
| server 127.0.0.1:8081 max_conns=1; |
| server 127.0.0.1:8082 max_conns=2; |
| } |
| upstream u_chash { |
| hash $remote_addr consistent; |
| server 127.0.0.1:8081 max_conns=1; |
| server 127.0.0.1:8082 max_conns=2; |
| } |
| |
| server { |
| listen 127.0.0.1:8084; |
| server_name localhost; |
| |
| location / { |
| return 444; |
| } |
| } |
| |
| server { |
| listen 127.0.0.1:8080; |
| server_name localhost; |
| |
| proxy_http_version 1.1; |
| proxy_set_header Connection ""; |
| proxy_buffering off; |
| |
| location /u { |
| proxy_pass http:/$uri; |
| } |
| |
| location /close { |
| proxy_pass http://127.0.0.1:8085; |
| } |
| } |
| } |
| |
| EOF |
| |
| $t->run_daemon(\&http_daemon, port(8081), port(8082), port(8085)); |
| $t->run(); |
| |
| $t->waitforsocket('127.0.0.1:' . port(8081)); |
| $t->waitforsocket('127.0.0.1:' . port(8082)); |
| $t->waitforsocket('127.0.0.1:' . port(8085)); |
| |
| ############################################################################### |
| |
| my @ports = my ($p1, $p2) = (port(8081), port(8082)); |
| |
| # two peers without max_conns |
| |
| is(parallel('/u_unlim?delay=0', 4), "$p1: 2, $p2: 2", 'unlimited'); |
| |
| # reopen connection to test connection subtraction |
| |
| my @s = http_get_multi('/u_lim', 2, 1.1); |
| http_get('/u_lim/close'); |
| push @s, http_get_multi('/u_lim', 1, 1.1); |
| http_get('/closeall'); |
| |
| is(http_end_multi(\@s), "$p1: 3", 'conn subtraction'); |
| |
| # simple test with limited peer |
| |
| is(parallel('/u_lim', 4), "$p1: 3", 'single'); |
| |
| # limited peer with backup peer |
| |
| is(peers('/u_backup', 6), "$p1 $p1 $p2 $p2 $p2 $p2", 'backup'); |
| |
| # peer and backup peer, both limited |
| |
| is(peers('/u_backup_lim', 6), "$p1 $p1 $p2 $p2 $p2 ", 'backup limited'); |
| |
| # all peers limited |
| |
| is(parallel('/u_two', 4), "$p1: 1, $p2: 1", 'all peers'); |
| |
| # subset of peers limited |
| |
| is(parallel('/u_some', 4), "$p1: 1, $p2: 3", 'some peers'); |
| |
| # ensure that peer "weight" does not affect its max_conns limit |
| |
| is(parallel('/u_weight', 4), "$p1: 1, $p2: 3", 'weight'); |
| |
| # peers with equal server value aggregate max_conns limit |
| |
| is(parallel('/u_many', 6), "$p1: 2, $p2: 4", 'equal peer'); |
| |
| # connections to peer selected with proxy_next_upstream are counted |
| |
| is(parallel('/u_pnu', 4), "$p1: 1, $p2: 2", 'proxy_next_upstream'); |
| |
| # least_conn balancer tests |
| |
| is(parallel('/u_lc', 4), "$p1: 1, $p2: 3", 'least_conn'); |
| is(peers('/u_lc_backup', 6), "$p1 $p1 $p2 $p2 $p2 $p2", 'least_conn backup'); |
| is(peers('/u_lc_backup_lim', 6), "$p1 $p1 $p2 $p2 $p2 ", |
| 'least_conn backup limited'); |
| |
| # ip_hash balancer tests |
| |
| is(parallel('/u_ih', 4), "$p1: 1, $p2: 2", 'ip_hash'); |
| |
| # hash balancer tests |
| |
| is(parallel('/u_hash', 4), "$p1: 1, $p2: 2", 'hash'); |
| is(parallel('/u_chash', 4), "$p1: 1, $p2: 2", 'hash consistent'); |
| |
| ############################################################################### |
| |
| sub peers { |
| my ($uri, $count) = @_; |
| |
| my @sockets = http_get_multi($uri, $count, 1.1); |
| http_get('/closeall'); |
| |
| join ' ', map { /X-Port: (\d+)/ && $1 } |
| map { http_end $_ } (@sockets); |
| } |
| |
| sub parallel { |
| my ($uri, $count) = @_; |
| |
| my @sockets = http_get_multi($uri, $count); |
| for (1 .. 20) { |
| last if IO::Select->new(@sockets)->can_read(3) == $count; |
| select undef, undef, undef, 0.01; |
| } |
| http_get('/closeall'); |
| return http_end_multi(\@sockets); |
| } |
| |
| sub http_get_multi { |
| my ($uri, $count, $wait) = @_; |
| my @sockets; |
| |
| for (0 .. $count - 1) { |
| $sockets[$_] = http_get($uri, start => 1); |
| IO::Select->new($sockets[$_])->can_read($wait) if $wait; |
| } |
| |
| return @sockets; |
| } |
| |
| sub http_end_multi { |
| my ($sockets) = @_; |
| my %ports; |
| |
| for my $sock (@$sockets) { |
| if (http_end($sock) =~ /X-Port: (\d+)/) { |
| $ports{$1} = 0 unless defined $ports{$1}; |
| $ports{$1}++; |
| } |
| close $sock; |
| } |
| |
| my @keys = map { my $p = $_; grep { $p == $_ } keys %ports } @ports; |
| return join ', ', map { $_ . ": " . $ports{$_} } @keys; |
| } |
| |
| ############################################################################### |
| |
| sub http_daemon { |
| my (@ports) = @_; |
| my (@socks, @clients); |
| |
| for my $port (@ports) { |
| my $server = IO::Socket::INET->new( |
| Proto => 'tcp', |
| LocalHost => "127.0.0.1:$port", |
| Listen => 42, |
| Reuse => 1 |
| ) |
| or die "Can't create listening socket: $!\n"; |
| push @socks, $server; |
| } |
| |
| my $sel = IO::Select->new(@socks); |
| my $skip = 4; |
| my $count = 0; |
| |
| local $SIG{PIPE} = 'IGNORE'; |
| |
| OUTER: |
| while (my @ready = $sel->can_read) { |
| foreach my $fh (@ready) { |
| if (grep $_ == $fh, @socks) { |
| my $new = $fh->accept; |
| $new->autoflush(1); |
| $sel->add($new); |
| $count++; |
| |
| } else { |
| my @busy = grep { $_->sockport() } @ready; |
| |
| # finish other handles |
| if ($fh->sockport() == port(8085) && @busy > 1 |
| && grep $_->sockport() != port(8085), |
| @busy) |
| { |
| next; |
| } |
| |
| # late events in other handles |
| if ($fh->sockport() == port(8085) && @busy == 1 |
| && $count > 1 && $skip-- > 0) |
| { |
| select undef, undef, undef, 0.1; |
| next OUTER; |
| } |
| |
| my $rv = process_socket($fh, \@clients); |
| if ($rv == 1) { |
| $sel->remove($fh); |
| $fh->close; |
| } |
| if ($rv == 2) { |
| for (@clients) { |
| $sel->remove($_); |
| $_->close; |
| } |
| $sel->remove($fh); |
| $fh->close; |
| $skip = 4; |
| } |
| $count--; |
| } |
| } |
| } |
| } |
| |
| # Returns true to close connection |
| |
| sub process_socket { |
| my ($client, $saved) = @_; |
| my $port = $client->sockport(); |
| |
| my $headers = ''; |
| my $uri = ''; |
| |
| while (<$client>) { |
| $headers .= $_; |
| last if (/^\x0d?\x0a?$/); |
| } |
| return 1 if $headers eq ''; |
| |
| $uri = $1 if $headers =~ /^\S+\s+([^ ]+)\s+HTTP/i; |
| return 1 if $uri eq ''; |
| |
| Test::Nginx::log_core('||', "$port: response, 200"); |
| print $client <<EOF; |
| HTTP/1.1 200 OK |
| X-Port: $port |
| |
| OK |
| EOF |
| |
| return 2 if $uri =~ /closeall/; |
| return 1 if $uri =~ /close/; |
| |
| push @$saved, $client; |
| return 0; |
| } |
| |
| ############################################################################### |
