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110 lines
3.5 KiB
110 lines
3.5 KiB
import ./make-test-python.nix ({ pkgs, lib, ... }: rec {
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name = "pacemaker";
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meta = with pkgs.lib.maintainers; {
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maintainers = [ astro ];
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};
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nodes =
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let
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node = i: {
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networking.interfaces.eth1.ipv4.addresses = [ {
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address = "192.168.0.${toString i}";
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prefixLength = 24;
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} ];
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services.corosync = {
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enable = true;
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clusterName = "zentralwerk-network";
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nodelist = lib.imap (i: name: {
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nodeid = i;
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inherit name;
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ring_addrs = [
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(builtins.head nodes.${name}.networking.interfaces.eth1.ipv4.addresses).address
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];
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}) (builtins.attrNames nodes);
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};
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environment.etc."corosync/authkey" = {
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source = builtins.toFile "authkey"
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# minimum length: 128 bytes
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"testtesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttest";
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mode = "0400";
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};
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services.pacemaker.enable = true;
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# used for pacemaker resource
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systemd.services.ha-cat = {
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description = "Highly available netcat";
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serviceConfig.ExecStart = "${pkgs.netcat}/bin/nc -l discard";
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};
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};
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in {
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node1 = node 1;
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node2 = node 2;
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node3 = node 3;
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};
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# sets up pacemaker with resources configuration, then crashes a
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# node and waits for service restart on another node
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testScript =
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let
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resources = builtins.toFile "cib-resources.xml" ''
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<resources>
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<primitive id="cat" class="systemd" type="ha-cat">
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<operations>
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<op id="stop-cat" name="start" interval="0" timeout="1s"/>
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<op id="start-cat" name="start" interval="0" timeout="1s"/>
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<op id="monitor-cat" name="monitor" interval="1s" timeout="1s"/>
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</operations>
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</primitive>
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</resources>
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'';
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in ''
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import re
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import time
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start_all()
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${lib.concatMapStrings (node: ''
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${node}.wait_until_succeeds("corosync-quorumtool")
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${node}.wait_for_unit("pacemaker.service")
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'') (builtins.attrNames nodes)}
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# No STONITH device
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node1.succeed("crm_attribute -t crm_config -n stonith-enabled -v false")
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# Configure the cat resource
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node1.succeed("cibadmin --replace --scope resources --xml-file ${resources}")
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# wait until the service is started
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while True:
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output = node1.succeed("crm_resource -r cat --locate")
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match = re.search("is running on: (.+)", output)
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if match:
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for machine in machines:
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if machine.name == match.group(1):
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current_node = machine
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break
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time.sleep(1)
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current_node.log("Service running here!")
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current_node.crash()
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# pick another node that's still up
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for machine in machines:
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if machine.booted:
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check_node = machine
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# find where the service has been started next
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while True:
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output = check_node.succeed("crm_resource -r cat --locate")
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match = re.search("is running on: (.+)", output)
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# output will remain the old current_node until the crash is detected by pacemaker
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if match and match.group(1) != current_node.name:
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for machine in machines:
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if machine.name == match.group(1):
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next_node = machine
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break
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time.sleep(1)
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next_node.log("Service migrated here!")
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'';
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})
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