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* Added a test for a simple load-balancing web server. The tests

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verify whether the reverse proxy works correctly if the back-ends go
  down and come up.  (Moved from the varia repo.)

svn path=/nixos/trunk/; revision=19356
This commit is contained in:
Eelco Dolstra 2010-01-11 15:58:15 +00:00
parent ee005424bf
commit 73bdc861b7
3 changed files with 96 additions and 0 deletions
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1
release.nix
View File

@ -128,6 +128,7 @@ let
installer.separateBoot = t.installer.separateBoot.test;
installer.simple = t.installer.simple.test;
kde4 = t.kde4.test;
proxy = t.proxy.test;
quake3 = t.quake3.test;
subversion = t.subversion.report;
trac = t.trac.test;

1
tests/default.nix
View File

@ -31,6 +31,7 @@ in
firefox = apply (import ./firefox.nix);
installer = pkgs.lib.mapAttrs (name: complete) (call (import ./installer.nix));
kde4 = apply (import ./kde4.nix);
proxy = apply (import ./proxy.nix);
quake3 = apply (import ./quake3.nix);
subversion = apply (import ./subversion.nix);
trac = apply (import ./trac.nix);

94
tests/proxy.nix Normal file
View File

@ -0,0 +1,94 @@
{ pkgs, ... }:
let
backend =
{ config, pkgs, ... }:
{
services.sshd.enable = true;
services.httpd.enable = true;
services.httpd.adminAddr = "foo@example.org";
services.httpd.documentRoot = "${pkgs.valgrind}/share/doc/valgrind/html";
};
in
{
nodes =
{ proxy =
{ config, pkgs, nodes, ... }:
{
services.httpd.enable = true;
services.httpd.adminAddr = "bar@example.org";
services.httpd.extraModules = ["proxy_balancer"];
services.httpd.extraConfig =
''
ExtendedStatus on
<Location /server-status>
Order deny,allow
Allow from all
SetHandler server-status
</Location>
<Proxy balancer://cluster>
Allow from all
BalancerMember http://${nodes.backend1.config.networking.hostName} retry=0
BalancerMember http://${nodes.backend2.config.networking.hostName} retry=0
</Proxy>
ProxyStatus full
ProxyPass /server-status !
ProxyPass / balancer://cluster/
ProxyPassReverse / balancer://cluster/
# For testing; don't want to wait forever for dead backend servers.
ProxyTimeout 5
'';
};
backend1 = backend;
backend2 = backend;
client = { config, pkgs, ... }: { };
};
testScript =
''
startAll;
$proxy->waitForJob("httpd");
$backend1->waitForJob("httpd");
$backend2->waitForJob("httpd");
# With the back-ends up, the proxy should work.
$client->mustSucceed("curl --fail http://proxy/");
$client->mustSucceed("curl --fail http://proxy/server-status");
# Block the first back-end.
$backend1->block;
# The proxy should still work.
$client->mustSucceed("curl --fail http://proxy/");
$client->mustSucceed("curl --fail http://proxy/");
# Block the second back-end.
$backend2->block;
# Now the proxy should fail as well.
$client->mustFail("curl --fail http://proxy/");
# But if the second back-end comes back, the proxy should start
# working again.
$backend2->unblock;
$client->mustSucceed("curl --fail http://proxy/");
'';
}