Update default SSH user to 'sol' and enhance cloud-init config; bump version to 0.1.15

- Change the default SSH username from 'ubuntu' to 'sol' for consistency with Solstice CI environment.
- Modify cloud-init user configuration to align with the new default, adding enhanced permissions and settings for 'sol' user.
- Increment orchestrator version to 0.1.15.

Signed-off-by: Till Wegmueller <toasterson@gmail.com>

crates/orchestrator/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "orchestrator"
-version = "0.1.14"
+version = "0.1.15"
 edition = "2024"
 build = "build.rs"
 

crates/orchestrator/src/main.rs

@@ -245,7 +245,7 @@ async fn main() -> Result<()> {
     let mq_cfg_clone = mq_cfg.clone();
     let tx_for_consumer = sched_tx.clone();
     let persist_for_consumer = persist.clone();
-    let default_ssh_user = std::sync::Arc::new(String::from("ubuntu"));
+    let default_ssh_user = std::sync::Arc::new(String::from("sol"));
     // Start consumer that can be shut down cooperatively on ctrl-c
     let (shutdown_tx, shutdown_rx) = tokio::sync::oneshot::channel::<()>();
     let consumer_task = tokio::spawn(async move {
@@ -446,7 +446,11 @@ fn make_cloud_init_userdata(
     let s = format!(
         r#"#cloud-config
 users:
-  - default
+  - name: sol
+    gecos: Solstice CI
+    groups: [sudo]
+    shell: /bin/bash
+    sudo: ALL=(ALL) NOPASSWD:ALL
     ssh_authorized_keys:
       - {ssh_pubkey}
 write_files:

crates/orchestrator/src/scheduler.rs

@@ -221,7 +221,7 @@ impl<H: Hypervisor + 'static> Scheduler<H> {
                                             ).await {
                                                 Some(ip) => {
                                                     let ip_owned = ip.clone();
-                                                    let user = item.ctx.ssh_user.clone().unwrap_or_else(|| "ubuntu".to_string());
+                                                    let user = item.ctx.ssh_user.clone().unwrap_or_else(|| "sol".to_string());
                                                     let per_job_key_path = item.ctx.ssh_private_key_path.as_ref().map(|s| expand_tilde(s));
                                                     let key_mem_opt = item.ctx.ssh_private_key_pem.clone();
                                                     // Choose correct runner binary based on label (illumos vs linux)