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Add notes for 2017-11-02
2017-11-02 08:37:59 +01:00
---
title: "November, 2017"
date: 2017-11-02T09:37:54+02:00
author: "Alan Orth"
tags: ["Notes"]
---
## 2017-11-01
- The CORE developers responded to say they are looking into their bot not respecting our robots.txt
## 2017-11-02
- Today there have been no hits by CORE and no alerts from Linode (coincidence?)
```
# grep -c "CORE" /var/log/nginx/access.log
0
```
Add notes for 2017-11-02
2017-11-02 09:07:34 +01:00
- Generate list of authors on CGSpace for Peter to go through and correct:
```
dspace=# \copy (select distinct text_value, count(*) as count from metadatavalue where metadata_field_id = (select metadata_field_id from metadatafieldregistry where element = 'contributor' and qualifier = 'author') AND resource_type_id = 2 group by text_value order by count desc) to /tmp/authors.csv with csv;
COPY 54701
```
Add notes for 2017-11-02
2017-11-02 08:37:59 +01:00
<!--more-->
Update notes for 2017-11-02
2017-11-02 16:05:37 +01:00
- Abenet asked if it would be possible to generate a report of items in Listing and Reports that had "International Fund for Agricultural Development" as the *only* investor
- I opened a ticket with Atmire to ask if this was possible: https://tracker.atmire.com/tickets-cgiar-ilri/view-ticket?id=540
- Work on making the thumbnails in the item view clickable
- Basically, once you read the METS XML for an item it becomes easy to trace the structure to find the bitstream link
```
//mets:fileSec/mets:fileGrp[@USE='CONTENT']/mets:file/mets:FLocat[@LOCTYPE='URL']/@xlink:href
```
- METS XML is available for all items with this pattern: /metadata/handle/10568/95947/mets.xml
- I whipped up a quick hack to print a clickable link with this URL on the thumbnail but it needs to check a few corner cases, like when there is a thumbnail but no content bitstream!
Update notes for 2017-11-02
2017-11-02 16:30:54 +01:00
- Help proof fifty-three CIAT records for Sisay: https://dspacetest.cgiar.org/handle/10568/95895
- A handful of issues with `cg.place` using format like "Lima, PE" instead of "Lima, Peru"
- Also, some dates like with completely invalid format like "2010- 06" and "2011-3-28"
- I also collapsed some consecutive whitespace on a handful of fields
Add notes for 2017-11-03
2017-11-03 17:15:40 +01:00
## 2017-11-03
- Atmire got back to us to say that they estimate it will take two days of labor to implement the change to Listings and Reports
- I said I'd ask Abenet if she wants that feature
Add notes for 2017-11-04
2017-11-04 15:44:23 +01:00
## 2017-11-04
- I finished looking through Sisay's CIAT records for the "Alianzas de Aprendizaje" data
- I corrected about half of the authors to standardize them
- Linode emailed this morning to say that the CPU usage was high again, this time at 6:14AM
- It's the first time in a few days that this has happened
- I had a look to see what was going on, but it isn't the CORE bot:
```
# awk '{print $1}' /var/log/nginx/access.log | sort -n | uniq -c | sort -h | tail
306 68.180.229.31
323 61.148.244.116
414 66.249.66.91
507 40.77.167.16
618 157.55.39.161
652 207.46.13.103
666 157.55.39.254
1173 104.196.152.243
1737 66.249.66.90
23101 138.201.52.218
```
- 138.201.52.218 is from some Hetzner server, and I see it making 40,000 requests yesterday too, but none before that:
```
# zgrep -c 138.201.52.218 /var/log/nginx/access.log*
/var/log/nginx/access.log:24403
/var/log/nginx/access.log.1:45958
/var/log/nginx/access.log.2.gz:0
/var/log/nginx/access.log.3.gz:0
/var/log/nginx/access.log.4.gz:0
/var/log/nginx/access.log.5.gz:0
/var/log/nginx/access.log.6.gz:0
```
- It's clearly a bot as it's making tens of thousands of requests, but it's using a "normal" user agent:
```
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.0 Safari/537.36
```
- For now I don't know what this user is!
Add notes for 2017-11-05
2017-11-05 14:06:22 +01:00
## 2017-11-05
- Peter asked if I could fix the appearance of "International Livestock Research Institute" in the author lookup during item submission
- It looks to be just an issue with the user interface expecting authors to have both a first and last name:
![Author lookup](/cgspace-notes/2017/11/author-lookup.png)
![Add author](/cgspace-notes/2017/11/add-author.png)
- But in the database the authors are correct (none with weird `, /` characters):
```
dspace=# select distinct text_value, authority, confidence from metadatavalue value where resource_type_id=2 and metadata_field_id=3 and text_value like 'International Livestock Research Institute%';
text_value | authority | confidence
--------------------------------------------+--------------------------------------+------------
International Livestock Research Institute | 8f3865dc-d056-4aec-90b7-77f49ab4735c | 0
International Livestock Research Institute | f4db1627-47cd-4699-b394-bab7eba6dadc | 0
International Livestock Research Institute | | -1
International Livestock Research Institute | 8f3865dc-d056-4aec-90b7-77f49ab4735c | 600
International Livestock Research Institute | f4db1627-47cd-4699-b394-bab7eba6dadc | -1
International Livestock Research Institute | | 600
International Livestock Research Institute | 8f3865dc-d056-4aec-90b7-77f49ab4735c | -1
International Livestock Research Institute | 8f3865dc-d056-4aec-90b7-77f49ab4735c | 500
(8 rows)
```
- So I'm not sure if this is just a graphical glitch or if editors have to edit this metadata field prior to approval
Update notes for 2017-11-05
2017-11-05 14:53:35 +01:00
- Looking at monitoring Tomcat's JVM heap with Prometheus, it looks like we need to use JMX + [jmx_exporter](https://github.com/prometheus/jmx_exporter)
- This guide shows how to [enable JMX in Tomcat](https://geekflare.com/enable-jmx-tomcat-to-monitor-administer/) by modifying `CATALINA_OPTS`
- I was able to successfully connect to my local Tomcat with jconsole!
Add notes for 2017-11-07
2017-11-07 13:50:01 +01:00
## 2017-11-07
- CGSpace when down and up a few times this morning, first around 3AM, then around 7
- Tsega had to restart Tomcat 7 to fix it temporarily
- I will start by looking at bot usage (access.log.1 includes usage until 6AM today):
```
# cat /var/log/nginx/access.log.1 | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
619 65.49.68.184
840 65.49.68.199
924 66.249.66.91
1131 68.180.229.254
1583 66.249.66.90
1953 207.46.13.103
1999 207.46.13.80
2021 157.55.39.161
2034 207.46.13.36
4681 104.196.152.243
```
- 104.196.152.243 seems to be a top scraper for a few weeks now:
```
# zgrep -c 104.196.152.243 /var/log/nginx/access.log*
/var/log/nginx/access.log:336
/var/log/nginx/access.log.1:4681
/var/log/nginx/access.log.2.gz:3531
/var/log/nginx/access.log.3.gz:3532
/var/log/nginx/access.log.4.gz:5786
/var/log/nginx/access.log.5.gz:8542
/var/log/nginx/access.log.6.gz:6988
/var/log/nginx/access.log.7.gz:7517
/var/log/nginx/access.log.8.gz:7211
/var/log/nginx/access.log.9.gz:2763
```
- This user is responsible for hundreds and sometimes thousands of Tomcat sessions:
```
$ grep 104.196.152.243 dspace.log.2017-11-07 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
954
$ grep 104.196.152.243 dspace.log.2017-11-03 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
6199
$ grep 104.196.152.243 dspace.log.2017-11-01 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
7051
```
- The worst thing is that this user never specifies a user agent string so we can't lump it in with the other bots using the Tomcat Session Crawler Manager Valve
- They don't request dynamic URLs like "/discover" but they seem to be fetching handles from XMLUI instead of REST (and some with `//handle`, note the regex below):
```
# grep -c 104.196.152.243 /var/log/nginx/access.log.1
4681
# grep 104.196.152.243 /var/log/nginx/access.log.1 | grep -c -P 'GET //?handle'
4618
```
- I just realized that `ciat.cgiar.org` points to 104.196.152.243, so I should contact Leroy from CIAT to see if we can change their scraping behavior
- The next IP (207.46.13.36) seem to be Microsoft's bingbot, but all its requests specify the "bingbot" user agent and there are no requests for dynamic URLs that are forbidden, like "/discover":
```
$ grep -c 207.46.13.36 /var/log/nginx/access.log.1
2034
# grep 207.46.13.36 /var/log/nginx/access.log.1 | grep -c "GET /discover"
0
```
- The next IP (157.55.39.161) also seems to be bingbot, and none of its requests are for URLs forbidden by robots.txt either:
```
# grep 157.55.39.161 /var/log/nginx/access.log.1 | grep -c "GET /discover"
0
```
- The next few seem to be bingbot as well, and they declare a proper user agent and do not request dynamic URLs like "/discover":
```
# grep -c -E '207.46.13.[0-9]{2,3}' /var/log/nginx/access.log.1
5997
# grep -E '207.46.13.[0-9]{2,3}' /var/log/nginx/access.log.1 | grep -c "bingbot"
5988
# grep -E '207.46.13.[0-9]{2,3}' /var/log/nginx/access.log.1 | grep -c "GET /discover"
0
```
- The next few seem to be Googlebot, and they declare a proper user agent and do not request dynamic URLs like "/discover":
```
# grep -c -E '66.249.66.[0-9]{2,3}' /var/log/nginx/access.log.1
3048
# grep -E '66.249.66.[0-9]{2,3}' /var/log/nginx/access.log.1 | grep -c Google
3048
# grep -E '66.249.66.[0-9]{2,3}' /var/log/nginx/access.log.1 | grep -c "GET /discover"
0
```
- The next seems to be Yahoo, which declares a proper user agent and does not request dynamic URLs like "/discover":
```
# grep -c 68.180.229.254 /var/log/nginx/access.log.1
1131
# grep 68.180.229.254 /var/log/nginx/access.log.1 | grep -c "GET /discover"
0
```
- The last of the top ten IPs seems to be some bot with a weird user agent, but they are not behaving too well:
```
# grep -c -E '65.49.68.[0-9]{3}' /var/log/nginx/access.log.1
2950
# grep -E '65.49.68.[0-9]{3}' /var/log/nginx/access.log.1 | grep -c "GET /discover"
330
```
- Their user agents vary, ie:
- `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36`
- `Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.97 Safari/537.11`
- `Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)`
- I'll just keep an eye on that one for now, as it only made a few hundred requests to dynamic discovery URLs
- While it's not in the top ten, Baidu is one bot that seems to not give a fuck:
```
Update notes
2017-11-16 09:15:33 +01:00
# cat /var/log/nginx/access.log /var/log/nginx/access.log.1 | grep "7/Nov/2017" | grep -c Baiduspider
8912
# cat /var/log/nginx/access.log /var/log/nginx/access.log.1 | grep "7/Nov/2017" | grep Baiduspider | grep -c -E "GET /(browse|discover|search-filter)"
2521
Add notes for 2017-11-07
2017-11-07 13:50:01 +01:00
```
- According to their documentation their bot [respects `robots.txt`](http://www.baidu.com/search/robots_english.html), but I don't see this being the case
- I think I will end up blocking Baidu as well...
- Next is for me to look and see what was happening specifically at 3AM and 7AM when the server crashed
- I should look in nginx access.log, rest.log, oai.log, and DSpace's dspace.log.2017-11-07
Update notes for 2017-11-09
2017-11-09 16:52:14 +01:00
- Here are the top IPs making requests to XMLUI from 2 to 8 AM:
Add notes for 2017-11-07
2017-11-07 13:50:01 +01:00
```
# cat /var/log/nginx/access.log /var/log/nginx/access.log.1 | grep -E '07/Nov/2017:0[2-8]' | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
279 66.249.66.91
373 65.49.68.199
446 68.180.229.254
470 104.196.152.243
470 197.210.168.174
598 207.46.13.103
603 157.55.39.161
637 207.46.13.80
703 207.46.13.36
724 66.249.66.90
```
- Of those, most are Google, Bing, Yahoo, etc, except 63.143.42.244 and 63.143.42.242 which are Uptime Robot
Update notes for 2017-11-09
2017-11-09 16:52:14 +01:00
- Here are the top IPs making requests to REST from 2 to 8 AM:
Update notes for 2017-11-07
2017-11-07 16:03:49 +01:00
```
Update notes for 2017-11-09
2017-11-09 16:52:14 +01:00
# cat /var/log/nginx/rest.log /var/log/nginx/rest.log.1 | grep -E '07/Nov/2017:0[2-8]' | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
Update notes for 2017-11-07
2017-11-07 16:03:49 +01:00
8 207.241.229.237
10 66.249.66.90
16 104.196.152.243
25 41.60.238.61
26 157.55.39.161
27 207.46.13.103
27 207.46.13.80
31 207.46.13.36
1498 50.116.102.77
```
- The OAI requests during that same time period are nothing to worry about:
```
# cat /var/log/nginx/oai.log /var/log/nginx/oai.log.1 | grep -E '07/Nov/2017:0[2-8]' | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
1 66.249.66.92
4 66.249.66.90
6 68.180.229.254
```
- The top IPs from dspace.log during the 2–8 AM period:
```
$ grep -E '2017-11-07 0[2-8]' dspace.log.2017-11-07 | grep -o -E 'ip_addr=[0-9.]+' | sort -n | uniq -c | sort -h | tail
143 ip_addr=213.55.99.121
181 ip_addr=66.249.66.91
223 ip_addr=157.55.39.161
248 ip_addr=207.46.13.80
251 ip_addr=207.46.13.103
291 ip_addr=207.46.13.36
297 ip_addr=197.210.168.174
312 ip_addr=65.49.68.199
462 ip_addr=104.196.152.243
488 ip_addr=66.249.66.90
```
- These aren't actually very interesting, as the top few are Google, CIAT, Bingbot, and a few other unknown scrapers
- The number of requests isn't even that high to be honest
- As I was looking at these logs I noticed another heavy user (124.17.34.59) that was not active during this time period, but made many requests today alone:
```
# zgrep -c 124.17.34.59 /var/log/nginx/access.log*
/var/log/nginx/access.log:22581
/var/log/nginx/access.log.1:0
/var/log/nginx/access.log.2.gz:14
/var/log/nginx/access.log.3.gz:0
/var/log/nginx/access.log.4.gz:0
/var/log/nginx/access.log.5.gz:3
/var/log/nginx/access.log.6.gz:0
/var/log/nginx/access.log.7.gz:0
/var/log/nginx/access.log.8.gz:0
/var/log/nginx/access.log.9.gz:1
```
- The whois data shows the IP is from China, but the user agent doesn't really give any clues:
```
# grep 124.17.34.59 /var/log/nginx/access.log | awk -F'" ' '{print $3}' | sort | uniq -c | sort -h
210 "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36"
22610 "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.2; Win64; x64; Trident/7.0; LCTE)"
```
- A Google search for "LCTE bot" doesn't return anything interesting, but this [Stack Overflow discussion](https://stackoverflow.com/questions/42500881/what-is-lcte-in-user-agent) references the lack of information
- So basically after a few hours of looking at the log files I am not closer to understanding what is going on!
- I do know that we want to block Baidu, though, as it does not respect `robots.txt`
- And as we speak Linode alerted that the outbound traffic rate is very high for the past two hours (about 12–14 hours)
- At least for now it seems to be that new Chinese IP (124.17.34.59):
```
# grep -E "07/Nov/2017:1[234]:" /var/log/nginx/access.log | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
198 207.46.13.103
203 207.46.13.80
205 207.46.13.36
218 157.55.39.161
249 45.5.184.221
258 45.5.187.130
386 66.249.66.90
410 197.210.168.174
1896 104.196.152.243
11005 124.17.34.59
```
- Seems 124.17.34.59 are really downloading all our PDFs, compared to the next top active IPs during this time!
```
# grep -E "07/Nov/2017:1[234]:" /var/log/nginx/access.log | grep 124.17.34.59 | grep -c pdf
5948
# grep -E "07/Nov/2017:1[234]:" /var/log/nginx/access.log | grep 104.196.152.243 | grep -c pdf
0
```
Update notes for 2017-11-07
2017-11-07 16:26:16 +01:00
- About CIAT, I think I need to encourage them to specify a user agent string for their requests, because they are not reuising their Tomcat session and they are creating thousands of sessions per day
- All CIAT requests vs unique ones:
```
$ grep -Io -E 'session_id=[A-Z0-9]{32}:ip_addr=104.196.152.243' dspace.log.2017-11-07 | wc -l
3506
$ grep -Io -E 'session_id=[A-Z0-9]{32}:ip_addr=104.196.152.243' dspace.log.2017-11-07 | sort | uniq | wc -l
3506
```
- I emailed CIAT about the session issue, user agent issue, and told them they should not scrape the HTML contents of communities, instead using the REST API
Update notes for 2017-11-07
2017-11-07 17:09:29 +01:00
- About Baidu, I found a link to their [robots.txt tester tool](http://ziyuan.baidu.com/robots/)
Update notes for 2017-11-07
2017-11-07 17:23:10 +01:00
- It seems like our robots.txt file is valid, and they claim to recognize that URLs like `/discover` should be forbidden (不允许, aka "not allowed"):
Update notes for 2017-11-07
2017-11-07 17:09:29 +01:00
![Baidu robots.txt tester](/cgspace-notes/2017/11/baidu-robotstxt.png)
- But they literally just made this request today:
```
180.76.15.136 - - [07/Nov/2017:06:25:11 +0000] "GET /discover?filtertype_0=crpsubject&filter_relational_operator_0=equals&filter_0=WATER%2C+LAND+AND+ECOSYSTEMS&filtertype=subject&filter_relational_operator=equals&filter=WATER+RESOURCES HTTP/1.1" 200 82265 "-" "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)"
```
- Along with another thousand or so requests to URLs that are forbidden in robots.txt today alone:
```
# grep -c Baiduspider /var/log/nginx/access.log
3806
# grep Baiduspider /var/log/nginx/access.log | grep -c -E "GET /(browse|discover|search-filter)"
1085
```
- I will think about blocking their IPs but they have 164 of them!
```
# grep "Baiduspider/2.0" /var/log/nginx/access.log | awk '{print $1}' | sort -n | uniq | wc -l
164
```
Add notes for 2017-11-08
2017-11-08 08:08:32 +01:00
## 2017-11-08
- Linode sent several alerts last night about CPU usage and outbound traffic rate at 6:13PM
- Linode sent another alert about CPU usage in the morning at 6:12AM
Update notes for 2017-11-08
2017-11-08 13:17:04 +01:00
- Jesus, the new Chinese IP (124.17.34.59) has downloaded 24,000 PDFs in the last 24 hours:
Add notes for 2017-11-08
2017-11-08 08:08:32 +01:00
```
Update notes for 2017-11-08
2017-11-08 13:17:04 +01:00
# cat /var/log/nginx/access.log /var/log/nginx/access.log.1 | grep -E "0[78]/Nov/2017:" | grep 124.17.34.59 | grep -v pdf.jpg | grep -c pdf
24981
Add notes for 2017-11-08
2017-11-08 08:08:32 +01:00
```
- This is about 20,000 Tomcat sessions:
```
$ cat dspace.log.2017-11-07 dspace.log.2017-11-08 | grep -Io -E 'session_id=[A-Z0-9]{32}:ip_addr=124.17.34.59' | sort | uniq | wc -l
20733
```
- I'm getting really sick of this
- Sisay re-uploaded the CIAT records that I had already corrected earlier this week, erasing all my corrections
- I had to re-correct all the publishers, places, names, dates, etc and apply the changes on DSpace Test
Update notes for 2017-11-08
2017-11-08 13:17:04 +01:00
- Run system updates on DSpace Test and reboot the server
- Magdalena had written to say that two of their Phase II project tags were missing on CGSpace, so I added them ([#346](https://github.com/ilri/DSpace/pull/346))
- I figured out a way to use nginx's map function to assign a "bot" user agent to misbehaving clients who don't define a user agent
- Most bots are automatically lumped into one generic session by [Tomcat's Crawler Session Manager Valve](https://tomcat.apache.org/tomcat-7.0-doc/config/valve.html#Crawler_Session_Manager_Valve) but this only works if their user agent matches a pre-defined regular expression like `.*[bB]ot.*`
- Some clients send thousands of requests without a user agent which ends up creating thousands of Tomcat sessions, wasting precious memory, CPU, and database resources in the process
- Basically, we modify the nginx config to add a mapping with a modified user agent `$ua`:
```
map $remote_addr $ua {
# 2017-11-08 Random Chinese host grabbing 20,000 PDFs
124.17.34.59 'ChineseBot';
default $http_user_agent;
}
```
- If the client's address matches then the user agent is set, otherwise the default `$http_user_agent` variable is used
- Then, in the server's `/` block we pass this header to Tomcat:
```
proxy_pass http://tomcat_http;
proxy_set_header User-Agent $ua;
```
- Note to self: the `$ua` variable won't show up in nginx access logs because the default `combined` log format doesn't show it, so don't run around pulling your hair out wondering with the modified user agents aren't showing in the logs!
- If a client matching one of these IPs connects without a session, it will be assigned one by the Crawler Session Manager Valve
- You can verify by cross referencing nginx's `access.log` and DSpace's `dspace.log.2017-11-08`, for example
Update notes for 2017-11-08
2017-11-08 13:20:27 +01:00
- I will deploy this on CGSpace later this week
Update notes for 2017-11-08
2017-11-08 13:26:08 +01:00
- I am interested to check how this affects the number of sessions used by the CIAT and Chinese bots (see above on [2017-11-07](#2017-11-07) for example)
Update notes for 2017-11-08
2017-11-08 14:20:49 +01:00
- I merged the clickable thumbnails code to `5_x-prod` ([#347](https://github.com/ilri/DSpace/pull/347)) and will deploy it later along with the new bot mapping stuff (and re-run the Asible `nginx` and `tomcat` tags)
Update notes for 2017-11-08
2017-11-08 21:26:37 +01:00
- I was thinking about Baidu again and decided to see how many requests they have versus Google to URL paths that are explicitly forbidden in `robots.txt`:
```
# zgrep Baiduspider /var/log/nginx/access.log* | grep -c -E "GET /(browse|discover|search-filter)"
22229
# zgrep Googlebot /var/log/nginx/access.log* | grep -c -E "GET /(browse|discover|search-filter)"
0
```
- It seems that they rarely even bother checking `robots.txt`, but Google does multiple times per day!
```
Update notes for 2017-11-09
2017-11-09 16:52:14 +01:00
# zgrep Baiduspider /var/log/nginx/access.log* | grep -c robots.txt
Update notes for 2017-11-08
2017-11-08 21:26:37 +01:00
14
Update notes for 2017-11-09
2017-11-09 16:52:14 +01:00
# zgrep Googlebot /var/log/nginx/access.log* | grep -c robots.txt
Update notes for 2017-11-08
2017-11-08 21:26:37 +01:00
1134
```
- I have been looking for a reason to ban Baidu and this is definitely a good one
- Disallowing `Baiduspider` in `robots.txt` probably won't work because this bot doesn't seem to respect the robot exclusion standard anyways!
- I will whip up something in nginx later
Update notes for 2017-11-08
2017-11-08 21:36:15 +01:00
- Run system updates on CGSpace and reboot the server
- Re-deploy latest `5_x-prod` branch on CGSpace and DSpace Test (includes the clickable thumbnails, CCAFS phase II project tags, and updated news text)
Add notes for 2017-11-09
2017-11-09 16:41:14 +01:00
## 2017-11-09
- Awesome, it seems my bot mapping stuff in nginx actually reduced the number of Tomcat sessions used by the CIAT scraper today, total requests and unique sessions:
```
Update notes for 2017-11-09
2017-11-10 12:52:33 +01:00
# zcat -f -- /var/log/nginx/access.log.1 /var/log/nginx/access.log.2.gz | grep '09/Nov/2017' | grep -c 104.196.152.243
8956
Add notes for 2017-11-09
2017-11-09 16:41:14 +01:00
$ grep 104.196.152.243 dspace.log.2017-11-09 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
223
```
- Versus the same stats for yesterday and the day before:
```
# zcat -f -- /var/log/nginx/access.log.1 /var/log/nginx/access.log.2.gz | grep '08/Nov/2017' | grep -c 104.196.152.243
10216
$ grep 104.196.152.243 dspace.log.2017-11-08 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
2592
Update notes for 2017-11-09
2017-11-09 16:52:14 +01:00
# zcat -f -- /var/log/nginx/access.log.2.gz /var/log/nginx/access.log.3.gz | grep '07/Nov/2017' | grep -c 104.196.152.243
Add notes for 2017-11-09
2017-11-09 16:41:14 +01:00
8120
Update notes for 2017-11-09
2017-11-09 16:52:14 +01:00
$ grep 104.196.152.243 dspace.log.2017-11-07 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
Add notes for 2017-11-09
2017-11-09 16:41:14 +01:00
3506
```
Update notes for 2017-11-09
2017-11-09 20:44:20 +01:00
- The number of sessions is over *ten times less*!
Update notes for 2017-11-09
2017-11-09 17:05:32 +01:00
- This gets me thinking, I wonder if I can use something like nginx's rate limiter to automatically change the user agent of clients who make too many requests
- Perhaps using a combination of geo and map, like illustrated here: https://www.nginx.com/blog/rate-limiting-nginx/
Update notes
2017-11-12 09:19:47 +01:00
## 2017-11-11
- I was looking at the Google index and noticed there are 4,090 search results for dspace.ilri.org but only seven for mahider.ilri.org
- Search with something like: inurl:dspace.ilri.org inurl:https
- I want to get rid of those legacy domains eventually!
## 2017-11-12
- Update the [Ansible infrastructure templates](https://github.com/ilri/rmg-ansible-public) to be a little more modular and flexible
Update notes for 2017-11-12
2017-11-12 09:41:44 +01:00
- Looking at the top client IPs on CGSpace so far this morning, even though it's only been eight hours:
```
# cat /var/log/nginx/access.log /var/log/nginx/access.log.1 | grep "12/Nov/2017" | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
243 5.83.120.111
335 40.77.167.103
424 66.249.66.91
529 207.46.13.36
554 40.77.167.129
604 207.46.13.53
754 104.196.152.243
883 66.249.66.90
1150 95.108.181.88
1381 5.9.6.51
```
- 5.9.6.51 seems to be a Russian bot:
```
# grep 5.9.6.51 /var/log/nginx/access.log | tail -n 1
5.9.6.51 - - [12/Nov/2017:08:13:13 +0000] "GET /handle/10568/16515/recent-submissions HTTP/1.1" 200 5097 "-" "Mozilla/5.0 (compatible; MegaIndex.ru/2.0; +http://megaindex.com/crawler)"
```
- What's amazing is that it seems to reuse its Java session across all requests:
```
$ grep -c -E 'session_id=[A-Z0-9]{32}:ip_addr=5.9.6.51' /home/cgspace.cgiar.org/log/dspace.log.2017-11-12
1558
$ grep 5.9.6.51 /home/cgspace.cgiar.org/log/dspace.log.2017-11-12 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
1
```
- Bravo to MegaIndex.ru!
- The same cannot be said for 95.108.181.88, which appears to be YandexBot, even though Tomcat's Crawler Session Manager valve regex should match 'YandexBot':
```
# grep 95.108.181.88 /var/log/nginx/access.log | tail -n 1
95.108.181.88 - - [12/Nov/2017:08:33:17 +0000] "GET /bitstream/handle/10568/57004/GenebankColombia_23Feb2015.pdf HTTP/1.1" 200 972019 "-" "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)"
$ grep -c -E 'session_id=[A-Z0-9]{32}:ip_addr=95.108.181.88' /home/cgspace.cgiar.org/log/dspace.log.2017-11-12
991
```
Update notes for 2017-11-12
2017-11-12 17:48:52 +01:00
- Move some items and collections on CGSpace for Peter Ballantyne, running [`move_collections.sh`](https://gist.github.com/alanorth/e60b530ed4989df0c731afbb0c640515) with the following configuration:
```
10947/6 10947/1 10568/83389
10947/34 10947/1 10568/83389
10947/2512 10947/1 10568/83389
```
- I explored nginx rate limits as a way to aggressively throttle Baidu bot which doesn't seem to respect disallowed URLs in robots.txt
- There's an interesting [blog post from Nginx's team about rate limiting](https://www.nginx.com/blog/rate-limiting-nginx/) as well as a [clever use of mapping with rate limits](https://gist.github.com/arosenhagen/8aaf5d7f94171778c0e9)
- The solution [I came up with](https://github.com/ilri/rmg-ansible-public/commit/f0646991772660c505bea9c5ac586490e7c86156) uses tricks from both of those
- I deployed the limit on CGSpace and DSpace Test and it seems to work well:
```
$ http --print h https://cgspace.cgiar.org/handle/10568/1 User-Agent:'Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)'
HTTP/1.1 200 OK
Connection: keep-alive
Content-Encoding: gzip
Content-Language: en-US
Content-Type: text/html;charset=utf-8
Date: Sun, 12 Nov 2017 16:30:19 GMT
Server: nginx
Strict-Transport-Security: max-age=15768000
Transfer-Encoding: chunked
Vary: Accept-Encoding
X-Cocoon-Version: 2.2.0
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
$ http --print h https://cgspace.cgiar.org/handle/10568/1 User-Agent:'Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)'
HTTP/1.1 503 Service Temporarily Unavailable
Connection: keep-alive
Content-Length: 206
Content-Type: text/html
Date: Sun, 12 Nov 2017 16:30:21 GMT
Server: nginx
```
- The first request works, second is denied with an HTTP 503!
- I need to remember to check the Munin graphs for PostgreSQL and JVM next week to see how this affects them
Add notes for 2017-11-13
2017-11-13 11:04:41 +01:00
## 2017-11-13
Update notes
2017-11-14 12:29:25 +01:00
- At the end of the day I checked the logs and it really looks like the Baidu rate limiting is working, HTTP 200 vs 503:
Add notes for 2017-11-13
2017-11-13 11:04:41 +01:00
```
Update notes
2017-11-14 12:29:25 +01:00
# zcat -f -- /var/log/nginx/access.log.1 /var/log/nginx/access.log.2.gz | grep "13/Nov/2017" | grep "Baiduspider" | grep -c " 200 "
1132
# zcat -f -- /var/log/nginx/access.log.1 /var/log/nginx/access.log.2.gz | grep "13/Nov/2017" | grep "Baiduspider" | grep -c " 503 "
10105
Add notes for 2017-11-13
2017-11-13 11:04:41 +01:00
```
- Helping Sisay proof 47 records for IITA: https://dspacetest.cgiar.org/handle/10568/97029
- From looking at the data in OpenRefine I found:
- Errors in `cg.authorship.types`
- Errors in `cg.coverage.country` (smart quote in "COTE D’IVOIRE", "HAWAII" is not a country)
Update notes
2017-11-14 12:29:25 +01:00
- Whitespace issues in some `cg.contributor.affiliation`
Add notes for 2017-11-13
2017-11-13 11:04:41 +01:00
- Whitespace issues in some `cg.identifier.doi` fields and most values are using HTTP instead of HTTPS
- Whitespace issues in some `dc.contributor.author` fields
- Issue with invalid `dc.date.issued` value "2011-3"
- Description fields are poorly copy–pasted
- Whitespace issues in `dc.description.sponsorship`
- Lots of inconsistency in `dc.format.extent` (mixed dash style, periods at the end of values)
- Whitespace errors in `dc.identifier.citation`
- Whitespace errors in `dc.subject`
- Whitespace errors in `dc.title`
- After uploading and looking at the data in DSpace Test I saw more errors with CRPs, subjects (one item had four copies of all of its subjects, another had a "." in it), affiliations, sponsors, etc.
Update notes
2017-11-14 12:29:25 +01:00
- Atmire responded to the [ticket about ORCID stuff](https://tracker.atmire.com/tickets-cgiar-ilri/view-ticket?id=510) a few days ago, today I told them that I need to talk to Peter and the partners to see what we would like to do
## 2017-11-14
- Deploy some nginx configuration updates to CGSpace
- They had been waiting on a branch for a few months and I think I just forgot about them
- I have been running them on DSpace Test for a few days and haven't seen any issues there
Update notes for 2017-11-14
2017-11-14 15:21:38 +01:00
- Started testing DSpace 6.2 and a few things have changed
- Now PostgreSQL needs `pgcrypto`:
```
$ psql dspace6
dspace6=# CREATE EXTENSION pgcrypto;
```
- Also, local settings are no longer in `build.properties`, they are now in `local.cfg`
- I'm not sure if we can use separate profiles like we did before with `mvn -Denv=blah` to use blah.properties
Update notes
2017-11-14 16:19:22 +01:00
- It seems we need to use "system properties" to override settings, ie: `-Ddspace.dir=/Users/aorth/dspace7`
Add notes for 2017-11-15
2017-11-15 14:12:56 +01:00
## 2017-11-15
- Send Adam Hunt an invite to the DSpace Developers network on Yammer
- He is the new head of communications at WLE, since Michael left
Update notes
2017-11-16 09:15:33 +01:00
- Merge changes to item view's wording of link metadata ([#348](https://github.com/ilri/DSpace/pull/348))
Add notes for 2017-11-17
2017-11-17 11:35:53 +01:00
## 2017-11-17
- Uptime Robot said that CGSpace went down today and I see lots of `Timeout waiting for idle object` errors in the DSpace logs
- I looked in PostgreSQL using `SELECT * FROM pg_stat_activity;` and saw that there were 73 active connections
- After a few minutes the connecitons went down to 44 and CGSpace was kinda back up, it seems like Tsega restarted Tomcat
- Looking at the REST and XMLUI log files, I don't see anything too crazy:
```
# cat /var/log/nginx/rest.log /var/log/nginx/rest.log.1 | grep "17/Nov/2017" | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
13 66.249.66.223
14 207.46.13.36
17 207.46.13.137
22 207.46.13.23
23 66.249.66.221
92 66.249.66.219
187 104.196.152.243
1400 70.32.83.92
1503 50.116.102.77
6037 45.5.184.196
# cat /var/log/nginx/access.log /var/log/nginx/access.log.1 | grep "17/Nov/2017" | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
325 139.162.247.24
354 66.249.66.223
422 207.46.13.36
434 207.46.13.23
501 207.46.13.137
647 66.249.66.221
662 34.192.116.178
762 213.55.99.121
1867 104.196.152.243
2020 66.249.66.219
```
- I need to look into using JMX to analyze active sessions I think, rather than looking at log files
- After adding appropriate [JMX listener options to Tomcat's JAVA_OPTS](https://geekflare.com/enable-jmx-tomcat-to-monitor-administer/) and restarting Tomcat, I can connect remotely using an SSH dynamic port forward (SOCKS) on port 7777 for example, and then start jconsole locally like:
```
$ jconsole -J-DsocksProxyHost=localhost -J-DsocksProxyPort=7777 service:jmx:rmi:///jndi/rmi://localhost:9000/jmxrmi -J-DsocksNonProxyHosts=
```
- Looking at the MBeans you can drill down in Catalina→Manager→<webapp>→localhost→Attributes and see active sessions, etc
- I want to enable JMX listener on CGSpace but I need to do some more testing on DSpace Test and see if it causes any performance impact, for example
- If I hit the server with some requests as a normal user I see the session counter increase, but if I specify a bot user agent then the sessions seem to be reused (meaning the Crawler Session Manager is working)
- Here is the Jconsole screen after looping `http --print Hh https://dspacetest.cgiar.org/handle/10568/1` for a few minutes:
![Jconsole sessions for XMLUI](/cgspace-notes/2017/11/jconsole-sessions.png)
Add notes for 2017-11-19
2017-11-19 15:11:12 +01:00
Update notes
2017-11-20 08:19:44 +01:00
- Switch DSpace Test to using the G1GC for JVM so I can see what the JVM graph looks like eventually, and start evaluating it for production
Add notes for 2017-11-19
2017-11-19 15:11:12 +01:00
## 2017-11-19
- Linode sent an alert that CGSpace was using a lot of CPU around 4–6 AM
- Looking in the nginx access logs I see the most active XMLUI users between 4 and 6 AM:
```
# cat /var/log/nginx/access.log /var/log/nginx/access.log.1 | grep -E "19/Nov/2017:0[456]" | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
111 66.249.66.155
171 5.9.6.51
188 54.162.241.40
229 207.46.13.23
233 207.46.13.137
247 40.77.167.6
251 207.46.13.36
275 68.180.229.254
325 104.196.152.243
1610 66.249.66.153
```
- 66.249.66.153 appears to be Googlebot:
```
66.249.66.153 - - [19/Nov/2017:06:26:01 +0000] "GET /handle/10568/2203 HTTP/1.1" 200 6309 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
```
- We know Googlebot is persistent but behaves well, so I guess it was just a coincidence that it came at a time when we had other traffic and server activity
- In related news, I see an Atmire update process going for many hours and responsible for hundreds of thousands of log entries (two thirds of all log entries)
```
$ wc -l dspace.log.2017-11-19
388472 dspace.log.2017-11-19
$ grep -c com.atmire.utils.UpdateSolrStatsMetadata dspace.log.2017-11-19
267494
```
- WTF is this process doing every day, and for so many hours?
- In unrelated news, when I was looking at the DSpace logs I saw a bunch of errors like this:
```
2017-11-19 03:00:32,806 INFO org.apache.pdfbox.pdfparser.PDFParser @ Document is encrypted
2017-11-19 03:00:32,807 ERROR org.apache.pdfbox.filter.FlateFilter @ FlateFilter: stop reading corrupt stream due to a DataFormatException
```
Add notes for 2017-11-19
2017-11-19 22:10:58 +01:00
Update notes
2017-11-20 08:19:44 +01:00
- It's been a few days since I enabled the G1GC on DSpace Test and the JVM graph definitely changed:
Add notes for 2017-11-19
2017-11-19 22:10:58 +01:00
Update notes
2017-11-20 08:19:44 +01:00
![Tomcat G1GC](/cgspace-notes/2017/11/tomcat-jvm-g1gc.png)
Add notes for 2017-11-20 and regenerate public
2017-11-20 14:56:01 +01:00
## 2017-11-20
- I found [an article about JVM tuning](https://www.cakesolutions.net/teamblogs/low-pause-gc-on-the-jvm) that gives some pointers how to enable logging and tools to analyze logs for you
- Also notes on [rotating GC logs](https://blog.gceasy.io/2016/11/15/rotating-gc-log-files/)
- I decided to switch DSpace Test back to the CMS garbage collector because it is designed for low pauses and high throughput (like G1GC!) and because we haven't even tried to monitor or tune it
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