6.20.3.1.2.3. Keystone authentication with Keystone API restart on one node¶
This report is generated on results collected by execution of the following Rally scenario:
---
{% set repeat = repeat|default(5) %}
Authenticate.keystone:
{% for iteration in range(repeat) %}
-
runner:
type: "constant_for_duration"
duration: 30
concurrency: 5
context:
users:
tenants: 1
users_per_tenant: 1
hooks:
-
name: fault_injection
args:
action: restart keystone service on one node
trigger:
name: event
args:
unit: iteration
at: [100]
{% endfor %}
6.20.3.1.2.3.1. Summary¶
In Fuel architecture Keystone is deployed behind Apache2, which in turn are behind NGINX front-end. In this scenario we restart Apache2 service, as result Keystone becomes unavailable on one of controller nodes.
Service downtime, s | MTTR, s | Absolute performance degradation, s | Relative performance degradation, ratio |
---|---|---|---|
1.07 ±0.76 | 5.44 ±0.47 | 0.41 ±0.22 | 4.7 ±2.0 |
- Metrics:
- Service downtime is the time interval between the first and the last errors.
- MTTR is the mean time to recover service performance after the fault.
- Absolute performance degradation is an absolute difference between the mean of operation duration during recovery period and the baseline’s.
- Relative performance degradation is the ratio between the mean of operation duration during recovery period and the baseline’s.
6.20.3.1.2.3.2. Details¶
This section contains individual data for particular scenario runs.
6.20.3.1.2.3.2.1. Run #1¶
6.20.3.1.2.3.2.1.1. Baseline¶
Baseline samples are collected before the start of fault injection. They are used to estimate service performance degradation after the fault.
Samples | Median, s | Mean, s | Std dev | 95% percentile, s |
---|---|---|---|---|
84 | 0.071 | 0.077 | 0.017 | 0.13 |
6.20.3.1.2.3.2.1.2. Service downtime¶
The tested service is not available during the following time period(s).
# | Downtime, s |
---|---|
1 | 0.88 ±0.75 |
6.20.3.1.2.3.2.1.3. Service performance degradation¶
The tested service has measurable performance degradation during the following time period(s).
# | Time to recover, s | Absolute degradation, s | Relative degradation |
---|---|---|---|
1 | 3.549 ±0.034 | 0.51 ±0.25 | 7.6 ±3.3 |
6.20.3.1.2.3.2.2. Run #2¶
6.20.3.1.2.3.2.2.1. Baseline¶
Baseline samples are collected before the start of fault injection. They are used to estimate service performance degradation after the fault.
Samples | Median, s | Mean, s | Std dev | 95% percentile, s |
---|---|---|---|---|
84 | 0.13 | 0.13 | 0.0086 | 0.14 |
6.20.3.1.2.3.2.2.2. Service downtime¶
The tested service is not available during the following time period(s).
# | Downtime, s |
---|---|
1 | 1.00 ±0.87 |
6.20.3.1.2.3.2.2.3. Service performance degradation¶
The tested service has measurable performance degradation during the following time period(s).
# | Time to recover, s | Absolute degradation, s | Relative degradation |
---|---|---|---|
1 | 6.038 ±0.034 | 0.35 ±0.17 | 3.7 ±1.3 |
6.20.3.1.2.3.2.3. Run #3¶
6.20.3.1.2.3.2.3.1. Baseline¶
Baseline samples are collected before the start of fault injection. They are used to estimate service performance degradation after the fault.
Samples | Median, s | Mean, s | Std dev | 95% percentile, s |
---|---|---|---|---|
84 | 0.13 | 0.12 | 0.0077 | 0.14 |
6.20.3.1.2.3.2.3.2. Service downtime¶
The tested service is not available during the following time period(s).
# | Downtime, s |
---|---|
1 | 0.26 ±0.12 |
6.20.3.1.2.3.2.3.3. Service performance degradation¶
The tested service has measurable performance degradation during the following time period(s).
# | Time to recover, s | Absolute degradation, s | Relative degradation |
---|---|---|---|
1 | 6.123 ±0.037 | 0.43 ±0.25 | 4.4 ±2.0 |
6.20.3.1.2.3.2.4. Run #4¶
6.20.3.1.2.3.2.4.1. Baseline¶
Baseline samples are collected before the start of fault injection. They are used to estimate service performance degradation after the fault.
Samples | Median, s | Mean, s | Std dev | 95% percentile, s |
---|---|---|---|---|
84 | 0.13 | 0.13 | 0.0089 | 0.14 |
6.20.3.1.2.3.2.4.2. Service downtime¶
The tested service is not available during the following time period(s).
# | Downtime, s |
---|---|
1 | 1.02 ±0.73 |
6.20.3.1.2.3.2.4.3. Service performance degradation¶
The tested service has measurable performance degradation during the following time period(s).
# | Time to recover, s | Absolute degradation, s | Relative degradation |
---|---|---|---|
1 | 5.860 ±0.027 | 0.25 ±0.13 | 2.9 ±1.1 |
6.20.3.1.2.3.2.5. Run #5¶
6.20.3.1.2.3.2.5.1. Baseline¶
Baseline samples are collected before the start of fault injection. They are used to estimate service performance degradation after the fault.
Samples | Median, s | Mean, s | Std dev | 95% percentile, s |
---|---|---|---|---|
87 | 0.13 | 0.13 | 0.019 | 0.14 |
6.20.3.1.2.3.2.5.2. Service downtime¶
The tested service is not available during the following time period(s).
# | Downtime, s |
---|---|
1 | 2.173 ±0.067 |
6.20.3.1.2.3.2.5.3. Service performance degradation¶
The tested service has measurable performance degradation during the following time period(s).
# | Time to recover, s | Absolute degradation, s | Relative degradation |
---|---|---|---|
1 | 5.630 ±0.048 | 0.52 ±0.30 | 5.0 ±2.3 |