jepsen: use 7 nodes

script/jepsen.garage/README.md

@@ -87,6 +87,8 @@ Results:
 
 - **Fails with the partition + layout reconfiguration nemesis** (`--scenario pr`).
   Example of a failed run: `garage set1/20231024T172214.488+0200` (1 failure in 4 runs).
+  TODO: investigate.
+  This is the failure mode we are looking for and trying to fix for NLnet task 3.
 
 
 ### Set, continuous test (interspersed reads and writes)

script/jepsen.garage/Vagrantfile

@@ -28,4 +28,5 @@ Vagrant.configure("2") do |config|
   config.vm.define "n4" do |config| vm(config, "n4", "192.168.56.24") end
   config.vm.define "n5" do |config| vm(config, "n5", "192.168.56.25") end
   config.vm.define "n6" do |config| vm(config, "n6", "192.168.56.26") end
+  config.vm.define "n7" do |config| vm(config, "n7", "192.168.56.27") end
 end

script/jepsen.garage/nodes.vagrant

@@ -4,3 +4,4 @@
 192.168.56.24
 192.168.56.25
 192.168.56.26
+192.168.56.27