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

[Thomas Lamprecht]

On 18.02.22 12:38, Aaron Lauterer wrote:
> 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...'));

'Loading...' is used by ExtJS, well, loading mask; I'd use the same here


> +
> +	    try {
> +		let result = await Promise.all([flagsPromise, statusPromise]);
> +
> +		let flagsData = result[0].result.data;
> +		let statusData = result[1].result.data;

one could deconstruct this directly, but it gets rather noisy:

let [ { result: { data: flagsData } }, { result: { data: statusData } } ] = await Promise.all(...);

meh...

> +
> +		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();

we normally set `autoShow: true` instead for new additions of such window instances.

>  	},