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#MR-simulator
This readme contains:
**Introduction**
**Building and running**
**Configuration**
###Introduction###
The MR-sim is a python script delivering batches of events including one or more fileReady for one or more PNFs.
It is possible to configure number of events, PNFs, consumer groups, exising or missing files, file prefixes and change identifier.
In addition, MR sim can be configured to deliver file url for up to 5 FTP servers (simulating the PNFs).
###Building and running###
It is possible build and run MR-sim manually as a container if needed. In addition MR-sim can be executed as python script, see instuctions further down.
Otherwise it is recommended to use the test scripts in the auto-test dir or run all simulators in one go using scripts in the simulator-group dir.
To build and run manually as a docker container:
1. Build docker container with ```docker build -t mrsim:latest .```
2. Run the container ```docker-compose up```
###Configuration###
The event pattern, called TC, of the MR-sim is controlled with a arg to python script. See section TC info for available patterns.
All other configuration is done via envrionment variables.
The simulator listens to port 2222.
The following envrionment vaiables are used:
**FTPS_SIMS** - A comma-separated list of hostname:port for the FTP servers to generate ftps file urls for. If not set MR sim will assume 'localhost:21'. Minimum 1 and maximum 5 host-port pairs can be given.
**SFTP_SIMS** - A comma-separated list of hostname:port for the FTP servers to generate sftp file urls for. If not set MR sim will assume 'localhost:1022'. Minimum 1 and maximum 5 host-port pairs can be given.
**NUM_FTP_SERVERS** - Number of FTP servers to use out of those specified in the envrioment variables above. The number shall be in the range 1-5.
**MR_GROUPS** - A comma-separated list of consummer-group:changeId[:changeId]*. Defines which change identifier that should be used for each consumer gropu. If not set the MR-sim will assume 'OpenDcae-c12:PM_MEAS_FILES'.
**MR_FILE_PREFIX_MAPPING** - A comma-separated list of changeId:filePrefix. Defines which file prefix to use for each change identifier, needed to distinguish files for each change identifiers. If not set the MR-sim will assume 'PM_MEAS_FILES:A
###Statistics read-out and commands###
The simulator can be queried for statistics and started/stopped (use curl from cmd line or open in browser, curl used below):
`curl localhost:2222` - Just returns 'Hello World'.
`curl localhost:2222/groups` - Return a comma-separated list of configured consumer groups..
`curl localhost:2222/changeids` - Return a commar-separated list of configured change id sets, where each set is a list of colon-separated change for each configured consumer group.
`curl localhost:2222/fileprefixes` - Return the setting of env var MR_FILE_PREFIX_MAPPING.
`curl localhost:2222/ctr_requests` - return an integer of the number of get request to the event poll path
`curl localhost:2222/groups/ctr_requests` - return an integer of the number of get requests, for all consumer groups, to the event poll path
`curl localhost:2222/ctr_requests/<consumer-group>` - return an integer of the number of get requests, for the specified consumer group, to the event poll path
`curl localhost:2222/ctr_responses` - return an integer of the number of get responses to the event poll path
`curl localhost:2222/ctr_files` - returns an integer or the number files.
`curl localhost:2222/ctr_unique_files` - returns an integer or the number of unique files. A unique file is the combination of node+file_sequence_number
`curl localhost:2222/tc_info` - returns the tc string (as given on the cmd line)
`curl localhost:2222/ctr_events` - returns the total number of events
`curl localhost:2222/execution_time` - returns the execution time in mm:ss
`curl localhost:2222/exe_time_first_poll` - returns the execution time in mm:ss from the first poll
`curl localhost:2222/ctr_unique_PNFs` - return the number of unique PNFS in alla events.
`curl localhost:2222/start` - start event delivery (default status).
`curl localhost:2222/stop` - stop event delivery.
`curl localhost:2222/status` - Return the started or stopped status.
#Alternative to running python (as described below) on your machine, use the docker files.
1. Build docker container with ```docker build -t mrsim:latest .```
2. Run the container ```docker-compose up```
The behavior can be changed by argument to the python script in the docker-compose.yml
The simulator can be queried for statistics and started/stopped (use curl from cmd line or open in browser, curl used below):
`curl localhost:2222/ctr_requests` - return an integer of the number of get request to the event poll path
`curl localhost:2222/ctr_responses` - return an integer of the number of get responses to the event poll path
`curl localhost:2222/ctr_files` - returns an integer or the number files.
`curl localhost:2222/ctr_unique_files` - returns an integer or the number of unique files. A unique file is the combination of node+file_sequence_number
`curl localhost:2222/tc_info` - returns the tc string (as given on the cmd line)
`curl localhost:2222/ctr_events` - returns the total number of events
`curl localhost:2222/execution_time` - returns the execution time in mm:ss
`curl localhost:2222/exe_time_first_poll` - returns the execution time in mm:ss from the first poll
`curl localhost:2222/ctr_unique_PNFs` - return the number of unique PNFS in alla events.
`curl localhost:2222/start` - start event delivery (default status).
`curl localhost:2222/stop` - stop event delivery.
`curl localhost:2222/status` - Return the started or stopped status.
##Common TC info
File names for 1MB, 5MB and 50MB files
Files in the format: <size-in-mb>MB_<sequence-number>.tar.gz Ex. for 5MB file with sequence number 12: 5MB_12.tar.gz
The sequence numbers are stepped so that all files have unique names
Missing files (files that are not expected to be found in the ftp server. Format: MissingFile_<sequence-number>.tar.gz
Limited event streams
When the number of events are exhausted, empty replies are returned '[]'
TC100 - One ME, SFTP, 1 1MB file, 1 event
TC101 - One ME, SFTP, 1 5MB file, 1 event
TC102 - One ME, SFTP, 1 50MB file, 1 event
TC110 - One ME, SFTP, 1MB files, 1 file per event, 100 events, 1 event per poll.
TC111 - One ME, SFTP, 1MB files, 100 files per event, 100 events, 1 event per poll.
TC112 - One ME, SFTP, 5MB files, 100 files per event, 100 events, 1 event per poll.
TC113 - One ME, SFTP, 1MB files, 100 files per event, 100 events. All events in one poll.
TC120 - One ME, SFTP, 1MB files, 100 files per event, 100 events, 1 event per poll. 10% of replies each: no response, empty message, slow response, 404-error, malformed json
TC121 - One ME, SFTP, 1MB files, 100 files per event, 100 events, 1 event per poll. 10% missing files
TC122 - One ME, SFTP, 1MB files, 100 files per event, 100 events. 1 event per poll. All files with identical name.
TC510 - 700 MEs, SFTP, 1MB files, 1 file per event, 3500 events, 700 event per poll.
TC200-TC202 same as TC100-TC102 but with FTPS
TC210-TC213 same as TC110-TC113 but with FTPS
TC2000-TC2001 same as TC1000-TC1001 but with FTPS
TC610 same as TC510 but with FTPS
Endless event streams
TC1000 - One ME, SFTP, 1MB files, 100 files per event, endless number of events, 1 event per poll
TC1001 - One ME, SFTP, 5MB files, 100 files per event, endless number of events, 1 event per poll
## Developer workflow
1. ```sudo apt install python3-venv```
2. ```source .env/bin/activate/```
3. ```pip3 install "anypackage"``` #also include in source code
4. ```pip3 freeze | grep -v "pkg-resources" > requirements.txt``` #to create a req file
5. ```FLASK_APP=mr-sim.py flask run```
or
```python3 mr-sim.py ```
6. Check/lint/format the code before commit/amed by ```autopep8 --in-place --aggressive --aggressive mr-sim.py```
## User workflow on *NIX
When cloning/fetching from the repository first time:
1. `git clone`
2. `cd "..." ` #navigate to this folder
3. `source setup.sh ` #setting up virtualenv and install requirements
you'll get a sourced virtualenv shell here, check prompt
4. `(env) $ python3 mr-sim.py --help`
alternatively
`(env) $ python3 mr-sim.py --tc1`
Every time you run the script, you'll need to step into the virtualenv by following step 3 first.
## User workflow on Windows
When cloning/fetching from the repository first time:
1. 'git clone'
2. then step into the folder
3. 'pip3 install virtualenv'
4. 'pip3 install virtualenvwrapper-win'
5. 'mkvirtualenv env'
6. 'workon env'
7. 'pip3 install -r requirements.txt' #this will install in the local environment then
8. 'python3 dfc-sim.py'
Every time you run the script, you'll need to step into the virtualenv by step 2+6.
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