Make MLEM work with flyctl 0.1.x

mlem/cli/deployment.py

@@ -145,7 +145,9 @@ def deploy_run_command(
                 if not meta.is_state_empty:
                     if not force:
                         raise DeploymentError(
-                            f"Different deployment meta already exists at {meta.loc}. Please use `mlem deployment run --load <path> ...`"
+                            f"The deployment file you specified ('{meta.loc.basename}') already describes a different deployment."
+                            " Please add `--force` to overwrite it,"
+                            " or use `mlem deployment run --load <path> ...` to reuse it."
                         )
                     echo(
                         EMOJI_STOP

mlem/contrib/flyio/meta.py

@@ -113,28 +113,35 @@ def _create_app(self, state: FlyioAppState):
                 args["access-token"] = self.get_env().access_token
             if self.org:
                 args["org"] = self.org
+            port = getattr(self.server, "ui_port", None) or self.server.port
+            if port:
+                args["internal-port"] = port
             run_flyctl("launch", workdir=tempdir, kwargs=args)
             state.fly_toml = read_fly_toml(tempdir)
-            port = getattr(self.server, "port", None) or getattr(
-                self.server, "ui_port", None
-            )
-            if port:  # tell flyio to expose specific port
+            if getattr(self.server, "server_port", None):
+                fly_toml = parse(state.fly_toml)
+                fly_toml["services.ports"] = {
+                    "handlers": ["http"],
+                    "port": self.server.server_port,
+                    "force_https": True,
+                }
+                state.fly_toml = fly_toml.as_string()
+            if getattr(self.server, "middlewares", None):
+                # set fly to collect metrics from prometheus if exposed
                 fly_toml = parse(state.fly_toml)
-                fly_toml["services"][0]["internal_port"] = port
-                if self.server and self.server.middlewares:
-                    # set fly to collect metrics from prometheus if exposed
-                    from mlem.contrib.prometheus import (  # noqa
-                        PrometheusFastAPIMiddleware,
-                    )
-
-                    if any(
-                        isinstance(m, PrometheusFastAPIMiddleware)
-                        for m in self.server.middlewares.__root__
-                    ):
-                        fly_toml["metrics"] = {
-                            "port": port,
-                            "path": "/metrics",
-                        }
+                from mlem.contrib.prometheus import (  # noqa
+                    PrometheusFastAPIMiddleware,
+                )
+
+                if any(
+                    isinstance(m, PrometheusFastAPIMiddleware)
+                    for m in self.server.middlewares.__root__
+                ):
+                    fly_toml["metrics"] = {
+                        "port": getattr(self.server, "server_port", None)
+                        or self.server.port,
+                        "path": "/metrics",
+                    }
                 state.fly_toml = fly_toml.as_string()
             status = get_status(workdir=tempdir)
             state.app_name = status.Name

mlem/contrib/flyio/utils.py

@@ -1,4 +1,5 @@
 import json
+import logging
 import os.path
 import subprocess
 from typing import Any, Dict
@@ -10,9 +11,20 @@
 FLY_TOML = "fly.toml"
 
 
+logger = logging.getLogger(__name__)
+
+
 def check_flyctl_exec():
     try:
-        run_flyctl("version", wrap_error=False)
+        cmd = run_flyctl("version --json", wrap_error=False)
+        output = json.loads(cmd.decode())
+        version = output.get("Version", None)
+        if not version or version.split(".")[1] != "1":
+            logger.warning(
+                "If flyio deployment is causing problems, the `flyctl` version may be the cause. "
+                f"You have {version} installed. Try to install `flyctl` 0.1.x."
+            )
+        return output
     except subprocess.SubprocessError as e:
         raise DeploymentError(
             "flyctl executable is not available. Please install it using <https://fly.io/docs/hands-on/install-flyctl/>"

tests/contrib/test_flyio.py

@@ -2,7 +2,15 @@
 from unittest.mock import ANY, patch
 
 from mlem.contrib.flyio.meta import FlyioApp
-from mlem.contrib.flyio.utils import FlyioStatusModel
+from mlem.contrib.flyio.utils import FlyioStatusModel, check_flyctl_exec
+
+
+def test_check_flyctl_exec():
+    output = check_flyctl_exec()
+    version = output["Version"]
+    assert (
+        version.split(".")[1] == "1"
+    ), f"flyctl version was bumped ({version} now), this may cause problems with deployment"
 
 
 def test_flyio_create_app(tmp_path: Path):