Antagonize the Crucible Agent (#1011)

The `agent-antagonist` will stress test the Crucible agent by
continuously requesting and deleting regions, randomly taking and
deleting snapshots of those regions.

Cargo.toml

@@ -23,6 +23,7 @@ members = [
     "smf",
     "upstairs",
     "workspace-hack",
+    "agent-antagonist",
 ]
 resolver = "2"
 
@@ -113,6 +114,7 @@ progenitor = { git = "https://github.com/oxidecomputer/progenitor", branch = "ma
 # local path
 crucible = { path = "./upstairs" }
 crucible-client-types = { path = "./crucible-client-types" }
+crucible-agent-client = { path = "./agent-client" }
 crucible-common = { path = "./common" }
 crucible-control-client = { path = "./control-client" }
 # importantly, don't use features = ["zfs_snapshot"] here, this will cause

agent-antagonist/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "agent-antagonist"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+reqwest.workspace = true
+crucible-agent-client.workspace = true
+tokio.workspace = true
+serde.workspace = true
+rand.workspace = true
+anyhow.workspace = true
+clap.workspace = true
+slog.workspace = true
+slog-term.workspace = true
+slog-bunyan.workspace = true
+crucible-common.workspace = true
+uuid.workspace = true
+crucible-workspace-hack.workspace = true