Merge pull request #532 from ceph/wip-12378

Adds task to wrap the aver utility

tasks/aver.py

@@ -0,0 +1,67 @@
+"""
+Aver wrapper task
+"""
+import contextlib
+import logging
+from subprocess import check_call, Popen, PIPE
+
+log = logging.getLogger(__name__)
+
+
+@contextlib.contextmanager
+def task(ctx, config):
+    """
+    Execute an aver assertion
+
+    Parameters:
+
+        input: file containing data referred to by the assertions. File name is
+               relative to the job's archive path
+        validations: list of validations in the Aver language
+
+    Example:
+    - aver:
+        input: bench_output.csv
+        validations:
+        - expect performance(alg='ceph') > performance(alg='raw')
+        - for size > 3 expect avg_throughput > 2000
+    """
+    log.info('Beginning aver...')
+    assert isinstance(config, dict), 'expecting dictionary for configuration'
+
+    if 'input' not in config:
+        raise Exception("Expecting 'input' option")
+    if len(config.get('validations', [])) < 1:
+        raise Exception("Expecting at least one entry in 'validations'")
+
+    url = ('https://github.com/ivotron/aver/releases/download/'
+           'v0.3.0/aver-linux-amd64.tar.bz2')
+
+    aver_path = ctx.archive + '/aver'
+
+    # download binary
+    check_call(['wget', '-O', aver_path + '.tbz', url])
+    check_call(['tar', 'xfj', aver_path + '.tbz', '-C', ctx.archive])
+
+    # print version
+    process = Popen([aver_path, '-v'], stdout=PIPE)
+    log.info(process.communicate()[0])
+
+    # validate
+    for validation in config['validations']:
+        cmd = (aver_path + ' -s -i ' + (ctx.archive + '/' + config['input']) +
+               ' "' + validation + '"')
+        log.info("executing: " + cmd)
+        process = Popen(cmd, stdout=PIPE, stderr=PIPE, shell=True)
+        (stdout, stderr) = process.communicate()
+        if stderr:
+            log.info('aver stderr: ' + stderr)
+        log.info('aver result: ' + stdout)
+        if stdout.strip(' \t\n\r') != 'true':
+            raise Exception('Failed validation: ' + validation)
+
+    try:
+        yield
+    finally:
+        log.info('Removing aver binary...')
+        check_call(['rm', aver_path, aver_path + '.tbz'])