progress of appserver upgrades to buster - https://phabricator.wikimedia.org/T245757

	A	B	C	D	E	F	G	H
1			on stretch	on buster	progress
2	total mw servers	356	50	306	85.96%
3	app-eqiad	63	1	62	98.41%	app-global	99.24%
4	api-eqiad	63	1	62	98.41%	api-global	99.22%
5	job-eqiad	24	0	24	100.00%	job-global	100.00%
6	parse-eqiad	24	24	0	0.00%	parse-global	0.00%	End of Q3
7	app-codfw	68	0	68	100.00%
8	api-codfw	65	0	65	100.00%
9	job-codfw	18	0	18	100.00%
10	parse-codfw	20	20	0	0.00%	eqiad	85.06%
11	maint	2	1	1	50.00%	codfw	88.30%
12	deploy	4	2	2	50.00%
13	debug	5	1	4	80.00%
14		total	50	306	85.96%
15
16	hwtype (purchase date)	stretch	buster	total
17	20160314	0	1	1
18	20160324	1	0	1
19	20160412	0	4	4
20	20160413	0	39	39
21	20160517	0	28	28
22	20160602	0	8	8
23	20161212	0	7	7
24	20170307	20	0	20
25	20170313	0	15	15
26	20170331	0	27	27
27	20180220	0	32	32
28	20180730	1	0	1
29	20190909	0	36	36
30	20191211	2	27	29
31	20191217	20	76	96
32	20201030	0	1	1
33	VM	1	4	5
34	total	45	305	350
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