[pve-devel] [PATCH manager 5/6] ui: osd: warn if removal could be problematic

[Aaron Lauterer]

If an OSD is removed during the wrong conditions, it could lead to
blocked IO or worst case data loss.

Check against global flags that limit the capabilities of Ceph to heal
itself (norebalance, norecover, noout) and if there are degraded
objects.

Unfortunately, the 'safe-to-destroy' API endpoint will not help here as
it only works as long as the OSD is still running. By the time the
destroy button is enabled, the OSD needs to be stopped.

Signed-off-by: Aaron Lauterer <a.lauterer at proxmox.com>
---
After the short discussion on the previous version [0] and the hints to
ok-to-stop & safe-to-destroy I kept the original approach with the
reason given in the commit message.

But now the checks are run before opening the window and showing a
loading screen.

[0] https://lists.proxmox.com/pipermail/pve-devel/2022-February/051597.html

 www/manager6/ceph/OSD.js | 66 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 65 insertions(+), 1 deletion(-)

diff --git a/www/manager6/ceph/OSD.js b/www/manager6/ceph/OSD.js
index e126f8d0..27f56760 100644
--- a/www/manager6/ceph/OSD.js
+++ b/www/manager6/ceph/OSD.js
@@ -178,6 +178,20 @@ Ext.define('PVE.CephRemoveOsd', {
 	    labelWidth: 130,
 	    fieldLabel: gettext('Cleanup Disks'),
 	},
+	{
+	    xtype: 'displayfield',
+	    name: 'osd-flag-hint',
+	    userCls: 'pmx-hint',
+	    value: gettext('Global flags limiting the self healing of Ceph are enabled.'),
+	    hidden: true,
+	},
+	{
+	    xtype: 'displayfield',
+	    name: 'degraded-objects-hint',
+	    userCls: 'pmx-hint',
+	    value: gettext('Objects are degraded. Consider waiting until the cluster is healthy.'),
+	    hidden: true,
+	},
     ],
     initComponent: function() {
         let me = this;
@@ -198,6 +212,13 @@ Ext.define('PVE.CephRemoveOsd', {
         });
 
         me.callParent();
+
+	if (me.warnings.flags) {
+	    me.down('field[name=osd-flag-hint]').setHidden(false);
+	}
+	if (me.warnings.degraded) {
+	    me.down('field[name=degraded-objects-hint]').setHidden(false);
+	}
     },
 });
 
@@ -434,12 +455,55 @@ Ext.define('PVE.node.CephOsdTree', {
 	    }).show();
 	},
 
-	destroy_osd: function() {
+	destroy_osd: async function() {
 	    let me = this;
 	    let vm = this.getViewModel();
+
+	    let warnings = {
+		flags: false,
+		degraded: false,
+	    };
+
+	    let flagsPromise = Proxmox.Async.api2({
+		url: `/cluster/ceph/flags`,
+		method: 'GET',
+	    });
+
+	    let statusPromise = Proxmox.Async.api2({
+		url: `/cluster/ceph/status`,
+		method: 'GET',
+	    });
+
+	    me.getView().mask(gettext('Please wait...'));
+
+	    try {
+		let result = await Promise.all([flagsPromise, statusPromise]);
+
+		let flagsData = result[0].result.data;
+		let statusData = result[1].result.data;
+
+		let flags = Array.from(
+		    flagsData.filter(v => v.value),
+		    v => v.name,
+		).filter(v => ['norebalance', 'norecover', 'noout'].includes(v));
+
+		if (flags.length) {
+		    warnings.flags = true;
+		}
+		if (Object.keys(statusData.pgmap).includes('degraded_objects')) {
+		    warnings.degraded = true;
+		}
+	    } catch (error) {
+		Ext.Msg.alert(gettext('Error'), error.htmlStatus);
+		me.getView().unmask();
+		return;
+	    }
+
+	    me.getView().unmask();
 	    Ext.create('PVE.CephRemoveOsd', {
 		nodename: vm.get('osdhost'),
 		osdid: vm.get('osdid'),
+		warnings: warnings,
 		taskDone: () => { me.reload(); },
 	    }).show();
 	},
-- 
2.30.2