Drop use of ops (after VirtFS support) (#160)

Now that the workspace files are managed by VirtFS mount,
the ephemeral workspace volumes are not needed anymore and therefore
the `ops` related functionality is not needed anymore.

Containerfile

@@ -23,9 +23,6 @@ RUN apt-get update && apt-get upgrade -y && apt-get install -y --no-install-reco
   curl \
   qemu-system
 
-# Install Ops.
-RUN /bin/curl -Lo /bin/ops https://storage.googleapis.com/cli/linux/ops && chmod 755 /bin/ops && /bin/ops update
-
 COPY ./crates/node/migrations /migrations
 
 RUN mkdir -p /var/lib/gevulot

crates/node/src/main.rs

@@ -31,7 +31,6 @@ use types::{transaction::Validated, Hash, Transaction};
 
 mod cli;
 mod mempool;
-mod nanos;
 mod networking;
 mod rpc_server;
 mod scheduler;

crates/node/src/vmm/qemu.rs

@@ -34,7 +34,6 @@ use vsock::get_local_cid;
 use super::{vm_server::ProgramRegistry, Provider, VMClient, VMHandle, VMId};
 use crate::{
     cli::Config,
-    nanos,
     types::{Hash, Program},
     vmm::ResourceRequest,
 };
@@ -163,14 +162,6 @@ impl Provider for Qemu {
             .collect::<String>()
             .to_lowercase();
 
-        // XXX: This isn't async and will call out to `ops` for now.
-        // tracing::debug!("creating workspace volume:{workspace_volume_label:?} for the VM");
-        // let workspace_file =
-        //     nanos::volume::create(&self.config.data_directory, &workspace_volume_label, "2g")?
-        //         .into_os_string();
-        // let workspace_file = workspace_file.to_str().expect("workspace volume path");
-        // tracing::debug!("workspace volume:{workspace_file:?} created");
-
         let cpus = req.cpus;
         let mem_req = req.mem;
         let cid = self.allocate_cid();
@@ -344,10 +335,6 @@ impl Provider for Qemu {
                     p.wait()
                 })?;
 
-            // GC ephemeral workspace volume.
-            // XXX: This isn't async and will call out to `ops`.
-            nanos::volume::delete(&qemu_vm_handle.workspace_volume_label)?;
-
             let cid = qemu_vm_handle.cid;
             self.release_cid(cid);