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drewkerrigan
115
docs/DOCKER.md
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115
docs/DOCKER.md
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### Docker Info Example Plugin
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#### Description
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Let's say we want to use `check_http_json.py` to read from Docker's `/info` HTTP API endpoint with the following parameters:
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##### Connection information
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* Host = 127.0.0.1:4243
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* Path = /info
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##### Rules for "aliveness"
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* Verify that the key `Containers` exists in the outputted JSON
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* Verify that the key `IPv4Forwarding` has a value of `1`
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* Verify that the key `Debug` has a value less than or equal to `2`
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* Verify that the key `Images` has a value greater than or equal to `1`
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* If any of these criteria are not met, report a WARNING to Nagios
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##### Gather Metrics
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* Report value of the key `Containers` with a MinValue of 0 and a MaxValue of 1000 as performance data
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* Report value of the key `Images` as performance data
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* Report value of the key `NEventsListener` as performance data
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* Report value of the key `NFd` as performance data
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* Report value of the key `NGoroutines` as performance data
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* Report value of the key `SwapLimit` as performance data
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#### Service Definition
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`localhost.cfg`
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```
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define service {
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use local-service
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host_name localhost
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service_description Docker info status checker
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check_command check_docker
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}
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```
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#### Command Definition with Arguments
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`commands.cfg`
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```
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define command{
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command_name check_docker
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command_line /usr/bin/python /usr/local/nagios/libexec/plugins/check_http_json.py -H 127.0.0.1:4243 -p info -e Containers -q IPv4Forwarding,1 -w Debug,2:2 -c Images,1:1 -m Containers,0:250,0:500,0,1000 Images NEventsListener NFd NGoroutines SwapLimit
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}
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```
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#### Sample Output
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```
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OK: Status OK.|'Containers'=1;0;1000 'Images'=11;0;0 'NEventsListener'=3;0;0 'NFd'=10;0;0 'NGoroutines'=14;0;0 'SwapLimit'=1;0;0
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```
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### Docker Container Monitor Example Plugin
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`check_http_json.py` is generic enough to read and evaluate rules on any HTTP endpoint that returns JSON. In this example we'll get the status of a specific container using it's ID which camn be found by using the list containers endpoint (`curl http://127.0.0.1:4243/containers/json?all=1`).
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##### Connection information
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* Host = 127.0.0.1:4243
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* Path = /containers/2356e8ccb3de8308ccb16cf8f5d157bc85ded5c3d8327b0dfb11818222b6f615/json
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##### Rules for "aliveness"
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* Verify that the key `ID` exists and is equal to the value `2356e8ccb3de8308ccb16cf8f5d157bc85ded5c3d8327b0dfb11818222b6f615`
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* Verify that the key `State.Running` has a value of `True`
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#### Service Definition
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`localhost.cfg`
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```
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define service {
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use local-service
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host_name localhost
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service_description Docker container liveness check
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check_command check_my_container
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}
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```
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#### Command Definition with Arguments
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`commands.cfg`
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```
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define command{
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command_name check_my_container
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command_line /usr/bin/python /usr/local/nagios/libexec/plugins/check_http_json.py -H 127.0.0.1:4243 -p /containers/2356e8ccb3de8308ccb16cf8f5d157bc85ded5c3d8327b0dfb11818222b6f615/json -q ID,2356e8ccb3de8308ccb16cf8f5d157bc85ded5c3d8327b0dfb11818222b6f615 State.Running,True
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}
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```
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#### Sample Output
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```
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WARNING: Status check failed, reason: Value True for key State.Running did not match.
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```
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The plugin threw a warning because the Container ID I used on my system has the following State object:
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```
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u'State': {...
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u'Running': False,
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...
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```
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If I change the command to have the parameter -q parameter `State.Running,False`, the output becomes:
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```
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OK: Status OK.
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```
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docs/RIAK.md
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docs/RIAK.md
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# Riak Stats Example
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## Description
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For this example we're going to use `check_http_json.py` as a pure CLI tool to read Riak's `/stats` endpoint
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## Connection information
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* Host = 127.0.0.1:8098
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* Path = /stats
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## JSON Stats Data
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* Full Riak HTTP Stats information can be found here: [http://docs.basho.com/riak/latest/dev/references/http/status/](http://docs.basho.com/riak/latest/dev/references/http/status/)
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* Information related to specific interesting stats can be found here: [http://docs.basho.com/riak/latest/ops/running/stats-and-monitoring/](http://docs.basho.com/riak/latest/ops/running/stats-and-monitoring/)
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## Connectivity Check
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* `ring_members`: We can use an existence check to monitor the number of ring members
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* `connected_nodes`: Similarly we can check the number of nodes that are in communication with this node, but this list will be empty in a 1 node cluster
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#### Sample Command
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For a single node dev "cluster", you might have a `ring_members` value like this:
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```
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"ring_members": [
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"riak@127.0.0.1"
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],
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```
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To validate that we have a single node, we can use this check:
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```
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$ ./check_http_json.py -H localhost -P 8098 -p stats -E "ring_members(0)"
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OK: Status OK.
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```
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If we were expecting at least 2 nodes in the cluster, we would use this check:
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```
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$ ./check_http_json.py -H localhost -P 8098 -p stats -E "ring_members(1)"
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CRITICAL: Status CRITICAL. Key ring_members(1) did not exist.
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```
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Obviously this fails because we only had a single `ring_member`. If we prefer to only get a warning instead of a critical for this check, we just use the correct flag:
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```
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$ ./check_http_json.py -H localhost -P 8098 -p stats -e "ring_members(1)"
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WARNING: Status WARNING. Key ring_members(1) did not exist.
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```
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## Gather Metrics
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The thresholds for acceptable values for these metrics will vary from system to system, following are the stats we'll be checking:
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### Throughput Metrics:
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* `node_gets`
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* `node_puts`
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* `vnode_counter_update`
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* `vnode_set_update`
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* `vnode_map_update`
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* `search_query_throughput_one`
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* `search_index_throughtput_one`
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* `consistent_gets`
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* `consistent_puts`
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* `vnode_index_reads`
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#### Sample Command
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```
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./check_http_json.py -H localhost -P 8098 -p stats -m \
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"node_gets" \
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"node_puts" \
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"vnode_counter_update" \
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"vnode_set_update" \
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"vnode_map_update" \
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"search_query_throughput_one" \
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"search_index_throughtput_one" \
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"consistent_gets" \
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"consistent_puts" \
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"vnode_index_reads"
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```
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#### Sample Output
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```
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OK: Status OK.|'node_gets'=0 'node_puts'=0 'vnode_counter_update'=0 'vnode_set_update'=0 'vnode_map_update'=0 'search_query_throughput_one'=0 'consistent_gets'=0 'consistent_puts'=0 'vnode_index_reads'=0
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```
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### Latency Metrics:
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* `node_get_fsm_time_mean,_median,_95,_99,_100`
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* `node_put_fsm_time_mean,_median,_95,_99,_100`
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* `object_counter_merge_time_mean,_median,_95,_99,_100`
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* `object_set_merge_time_mean,_median,_95,_99,_100`
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* `object_map_merge_time_mean,_median,_95,_99,_100`
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* `search_query_latency_median,_min,_95,_99,_999`
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* `search_index_latency_median,_min,_95,_99,_999`
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* `consistent_get_time_mean,_median,_95,_99,_100`
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* `consistent_put_time_mean,_median,_95,_99,_100`
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#### Sample Command
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```
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./check_http_json.py -H localhost -P 8098 -p stats -m \
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"node_get_fsm_time_mean,,0:100,0:1000" \
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"node_get_fsm_time_median,,0:100,0:1000" \
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"node_get_fsm_time_95,,0:100,0:1000" \
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"node_get_fsm_time_99,,0:100,0:1000" \
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"node_get_fsm_time_100,,0:100,0:1000" \
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"node_put_fsm_time_mean,,0:100,0:1000" \
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"node_put_fsm_time_median,,0:100,0:1000" \
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"node_put_fsm_time_95,,0:100,0:1000" \
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"node_put_fsm_time_99,,0:100,0:1000" \
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"node_put_fsm_time_100,,0:100,0:1000" \
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"object_counter_merge_time_mean,,0:100,0:1000" \
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"object_counter_merge_time_median,,0:100,0:1000" \
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"object_counter_merge_time_95,,0:100,0:1000" \
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"object_counter_merge_time_99,,0:100,0:1000" \
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"object_counter_merge_time_100,,0:100,0:1000" \
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"object_set_merge_time_mean,,0:100,0:1000" \
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"object_set_merge_time_median,,0:100,0:1000" \
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"object_set_merge_time_95,,0:100,0:1000" \
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"object_set_merge_time_99,,0:100,0:1000" \
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"object_set_merge_time_100,,0:100,0:1000" \
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"object_map_merge_time_mean,,0:100,0:1000" \
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"object_map_merge_time_median,,0:100,0:1000" \
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"object_map_merge_time_95,,0:100,0:1000" \
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"object_map_merge_time_99,,0:100,0:1000" \
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"object_map_merge_time_100,,0:100,0:1000" \
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"consistent_get_time_mean,,0:100,0:1000" \
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"consistent_get_time_median,,0:100,0:1000" \
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"consistent_get_time_95,,0:100,0:1000" \
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"consistent_get_time_99,,0:100,0:1000" \
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"consistent_get_time_100,,0:100,0:1000" \
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"consistent_put_time_mean,,0:100,0:1000" \
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"consistent_put_time_median,,0:100,0:1000" \
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"consistent_put_time_95,,0:100,0:1000" \
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"consistent_put_time_99,,0:100,0:1000" \
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"consistent_put_time_100,,0:100,0:1000" \
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"search_query_latency_median,,0:100,0:1000" \
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"search_query_latency_min,,0:100,0:1000" \
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"search_query_latency_95,,0:100,0:1000" \
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"search_query_latency_99,,0:100,0:1000" \
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"search_query_latency_999,,0:100,0:1000" \
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"search_index_latency_median,,0:100,0:1000" \
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"search_index_latency_min,,0:100,0:1000" \
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"search_index_latency_95,,0:100,0:1000" \
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"search_index_latency_99,,0:100,0:1000" \
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"search_index_latency_999,,0:100,0:1000"
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```
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#### Sample Output
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```
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OK: Status OK.|'node_get_fsm_time_mean'=0;0:100;0:1000 'node_get_fsm_time_median'=0;0:100;0:1000 'node_get_fsm_time_95'=0;0:100;0:1000 'node_get_fsm_time_99'=0;0:100;0:1000 'node_get_fsm_time_100'=0;0:100;0:1000 'node_put_fsm_time_mean'=0;0:100;0:1000 'node_put_fsm_time_median'=0;0:100;0:1000 'node_put_fsm_time_95'=0;0:100;0:1000 'node_put_fsm_time_99'=0;0:100;0:1000 'node_put_fsm_time_100'=0;0:100;0:1000 'object_counter_merge_time_mean'=0;0:100;0:1000 'object_counter_merge_time_median'=0;0:100;0:1000 'object_counter_merge_time_95'=0;0:100;0:1000 'object_counter_merge_time_99'=0;0:100;0:1000 'object_counter_merge_time_100'=0;0:100;0:1000 'object_set_merge_time_mean'=0;0:100;0:1000 'object_set_merge_time_median'=0;0:100;0:1000 'object_set_merge_time_95'=0;0:100;0:1000 'object_set_merge_time_99'=0;0:100;0:1000 'object_set_merge_time_100'=0;0:100;0:1000 'object_map_merge_time_mean'=0;0:100;0:1000 'object_map_merge_time_median'=0;0:100;0:1000 'object_map_merge_time_95'=0;0:100;0:1000 'object_map_merge_time_99'=0;0:100;0:1000 'object_map_merge_time_100'=0;0:100;0:1000 'consistent_get_time_mean'=0;0:100;0:1000 'consistent_get_time_median'=0;0:100;0:1000 'consistent_get_time_95'=0;0:100;0:1000 'consistent_get_time_99'=0;0:100;0:1000 'consistent_get_time_100'=0;0:100;0:1000 'consistent_put_time_mean'=0;0:100;0:1000 'consistent_put_time_median'=0;0:100;0:1000 'consistent_put_time_95'=0;0:100;0:1000 'consistent_put_time_99'=0;0:100;0:1000 'consistent_put_time_100'=0;0:100;0:1000 'search_query_latency_median'=0;0:100;0:1000 'search_query_latency_min'=0;0:100;0:1000 'search_query_latency_95'=0;0:100;0:1000 'search_query_latency_99'=0;0:100;0:1000 'search_query_latency_999'=0;0:100;0:1000 'search_index_latency_median'=0;0:100;0:1000 'search_index_latency_min'=0;0:100;0:1000 'search_index_latency_95'=0;0:100;0:1000 'search_index_latency_99'=0;0:100;0:1000 'search_index_latency_999'=0;0:100;0:1000
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```
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### Erlang Resource Usage Metrics:
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* `sys_process_count`
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* `memory_processes`
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* `memory_processes_used`
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#### Sample Command
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```
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./check_http_json.py -H localhost -P 8098 -p stats -m \
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"sys_process_count,,0:5000,0:10000" \
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"memory_processes,,0:50000000,0:100000000" \
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"memory_processes_used,,0:50000000,0:100000000"
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```
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#### Sample Output
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```
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OK: Status OK.|'sys_process_count'=1637;0:5000;0:10000 'memory_processes'=46481112;0:50000000;0:100000000 'memory_processes_used'=46476880;0:50000000;0:100000000
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```
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### General Riak Load / Health Metrics:
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* `node_get_fsm_siblings_mean,_median,_95,_99,_100`
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* `node_get_fsm_objsize_mean,_median,_95,_99,_100`
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* `riak_search_vnodeq_mean,_median,_95,_99,_100`
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* `search_index_fail_one`
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* `pbc_active`
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* `pbc_connects`
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* `read_repairs`
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* `list_fsm_active`
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* `node_get_fsm_rejected`
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* `node_put_fsm_rejected`
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#### Sample Command
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```
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./check_http_json.py -H localhost -P 8098 -p stats -m \
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"node_get_fsm_siblings_mean,,0:100,0:1000" \
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"node_get_fsm_siblings_median,,0:100,0:1000" \
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"node_get_fsm_siblings_95,,0:100,0:1000" \
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"node_get_fsm_siblings_99,,0:100,0:1000" \
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"node_get_fsm_siblings_100,,0:100,0:1000" \
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"node_get_fsm_objsize_mean,,0:100,0:1000" \
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"node_get_fsm_objsize_median,,0:100,0:1000" \
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"node_get_fsm_objsize_95,,0:100,0:1000" \
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"node_get_fsm_objsize_99,,0:100,0:1000" \
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"node_get_fsm_objsize_100,,0:100,0:1000" \
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"riak_search_vnodeq_mean,,0:100,0:1000" \
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"riak_search_vnodeq_median,,0:100,0:1000" \
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"riak_search_vnodeq_95,,0:100,0:1000" \
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"riak_search_vnodeq_99,,0:100,0:1000" \
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"riak_search_vnodeq_100,,0:100,0:1000" \
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"search_index_fail_one,,0:100,0:1000" \
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"pbc_active,,0:100,0:1000" \
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"pbc_connects,,0:100,0:1000" \
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"read_repairs,,0:100,0:1000" \
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"list_fsm_active,,0:100,0:1000" \
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"node_get_fsm_rejected,,0:100,0:1000" \
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"node_put_fsm_rejected,,0:100,0:1000"
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```
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#### Sample Output
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```
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OK: Status OK.|'node_get_fsm_siblings_mean'=0;0:100;0:1000 'node_get_fsm_siblings_median'=0;0:100;0:1000 'node_get_fsm_siblings_95'=0;0:100;0:1000 'node_get_fsm_siblings_99'=0;0:100;0:1000 'node_get_fsm_siblings_100'=0;0:100;0:1000 'node_get_fsm_objsize_mean'=0;0:100;0:1000 'node_get_fsm_objsize_median'=0;0:100;0:1000 'node_get_fsm_objsize_95'=0;0:100;0:1000 'node_get_fsm_objsize_99'=0;0:100;0:1000 'node_get_fsm_objsize_100'=0;0:100;0:1000 'search_index_fail_one'=0;0:100;0:1000 'pbc_active'=0;0:100;0:1000 'pbc_connects'=0;0:100;0:1000 'read_repairs'=0;0:100;0:1000 'list_fsm_active'=0;0:100;0:1000 'node_get_fsm_rejected'=0;0:100;0:1000 'node_put_fsm_rejected'=0;0:100;0:1000
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```
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