Patch to adapt DataSourceOracle and make it functional for OCI.
Also includes setting for retries and timeouts previously provided by
a separate patch to help PCA instances get IMDS data. 

Orabug: 37065979

Signed-off-by: Rajesh Harekal <rajesh.harekal@oracle.com>
---
diff -git a/cloudinit/sources/DataSourceOracle.py b/cloudinit/sources/DataSourceOracle.py
--- a/cloudinit/sources/DataSourceOracle.py	2025-03-07 16:04:37.773216485 -0800
+++ a/cloudinit/sources/DataSourceOracle.py	2025-03-07 16:32:33.174574170 -0800
@@ -15,6 +15,7 @@
 
 import base64
 import ipaddress
+import os
 import json
 import logging
 import time
@@ -32,6 +33,8 @@
 
 LOG = logging.getLogger(__name__)
 
+ISCSI_IBFT_PATH='/sys/firmware/acpi/tables/iBFT'
+
 BUILTIN_DS_CONFIG = {
     # Don't use IMDS to configure secondary NICs by default
     "configure_secondary_nics": False,
@@ -135,8 +138,8 @@
     perform_dhcp_setup = True
 
     # Careful...these can be overridden in __init__
-    url_max_wait = 30
-    url_timeout = 5
+    url_max_wait = 180
+    url_timeout = 20
 
     def __init__(self, sys_cfg, *args, **kwargs):
         super(DataSourceOracle, self).__init__(sys_cfg, *args, **kwargs)
@@ -149,7 +152,7 @@
             ]
         )
         self._network_config_source = KlibcOracleNetworkConfigSource()
-        self._network_config: dict = {"config": [], "version": 1}
+        self._network_config = sources.UNSET
 
         url_params = self.get_url_params()
         self.url_max_wait = url_params.max_wait_seconds
@@ -274,7 +277,7 @@
 
     def _is_iscsi_root(self) -> bool:
         """Return whether we are on a iscsi machine."""
-        return self._network_config_source.is_applicable()
+        return self._network_config_source.is_applicable() or bool(os.path.exists(ISCSI_IBFT_PATH))
 
     def _get_iscsi_config(self) -> dict:
         return self._network_config_source.render_config()
@@ -294,34 +297,31 @@
 
         set_primary = False
         # this is v1
-        if self._is_iscsi_root():
-            self._network_config = self._get_iscsi_config()
-        if not self._has_network_config():
-            LOG.warning(
-                "Could not obtain network configuration from initramfs. "
-                "Falling back to IMDS."
+        if self._network_config == sources.UNSET:
+            # this is v1
+            if not self._has_network_config():
+                self._network_config = self.distro.generate_fallback_config()
+                set_primary = True
+
+            set_secondary = self.ds_cfg.get(
+                "configure_secondary_nics",
+                BUILTIN_DS_CONFIG["configure_secondary_nics"],
             )
-            set_primary = True
-
-        set_secondary = self.ds_cfg.get(
-            "configure_secondary_nics",
-            BUILTIN_DS_CONFIG["configure_secondary_nics"],
-        )
-        if set_primary or set_secondary:
-            try:
-                # Mutate self._network_config to include primary and/or
-                # secondary VNICs
-                self._add_network_config_from_opc_imds(set_primary)
-            except Exception:
-                util.logexc(
-                    LOG,
-                    "Failed to parse IMDS network configuration!",
-                )
+            if set_primary or set_secondary:
+                try:
+                    # Mutate self._network_config to include primary and/or
+                    # secondary VNICs
+                    self._add_network_config_from_opc_imds(set_primary)
+                except Exception:
+                    util.logexc(
+                        LOG,
+                        "Failed to parse IMDS network configuration!",
+                    )
 
-        # we need to verify that the nic selected is not a netfail over
-        # device and, if it is a netfail master, then we need to avoid
-        # emitting any match by mac
-        _ensure_netfailover_safe(self._network_config)
+            # we need to verify that the nic selected is not a netfail over
+            # device and, if it is a netfail master, then we need to avoid
+            # emitting any match by mac
+            _ensure_netfailover_safe(self._network_config)
 
         return self._network_config