set CONDA_OVERRIDE_GLIBC by default (#2177)

* set CONDA_OVERRIDE_GLIBC by default

* clean up

metaflow/plugins/pypi/micromamba.py

@@ -21,6 +21,9 @@ def __init__(self, error):
         super(MicromambaException, self).__init__(msg)
 
 
+GLIBC_VERSION = os.environ.get("CONDA_OVERRIDE_GLIBC", "2.38")
+
+
 class Micromamba(object):
     def __init__(self, logger=None):
         # micromamba is a tiny version of the mamba package manager and comes with
@@ -78,6 +81,9 @@ def solve(self, id_, packages, python, platform):
                 "MAMBA_ADD_PIP_AS_PYTHON_DEPENDENCY": "true",
                 "CONDA_SUBDIR": platform,
                 # "CONDA_UNSATISFIABLE_HINTS_CHECK_DEPTH": "0" # https://github.com/conda/conda/issues/9862
+                # Add a default glibc version for linux-64 environments (ignored for other platforms)
+                # TODO: Make the version configurable
+                "CONDA_OVERRIDE_GLIBC": GLIBC_VERSION,
             }
             cmd = [
                 "create",
@@ -132,6 +138,7 @@ def download(self, id_, packages, python, platform):
         with tempfile.TemporaryDirectory() as tmp_dir:
             env = {
                 "CONDA_SUBDIR": platform,
+                "CONDA_OVERRIDE_GLIBC": GLIBC_VERSION,
             }
             cmd = [
                 "create",
@@ -171,6 +178,7 @@ def create(self, id_, packages, python, platform):
             # use hardlinks when possible, otherwise copy files
             # disabled for now since it adds to environment creation latencies
             "CONDA_ALLOW_SOFTLINKS": "0",
+            "CONDA_OVERRIDE_GLIBC": GLIBC_VERSION,
         }
         cmd = [
             "create",