Docker Memcached CentOS 7.0 + Memcached 1.4.22 Docker Image

eva2000 · Feb 22, 2015

Like the CentOS 6.6 Memcached Docker Image version, this one is the CentOS 7.0 Memcached Docker Image version built on REMI YUM repositories Memached 1.4.22 version on CentOS 7.0 64bit OS for use with Centmin Mod LEMP web stacks.

Github repository with Dockerfile github.com/centminmod/docker-centos7-memcached
Docker Hub repo registry.hub.docker.com/u/centminmod/docker-centos7-memcached/
Quay.io repo quay.io/repository/centminmod/docker-centos7-memcached

Grab from Docker Hub

Code:

docker pull centminmod/docker-centos7-memcached

Run docker container

Code:

docker run -d -p 11211:11211 -t centminmod/docker-centos7-memcached

or specify a name e.g. memc1

Code:

docker run --name memc1 -d -p 11211:11211 -t centminmod/docker-centos7-memcached

or map to 33211 local host port

Code:

docker run --name memc1 -d -p 33211:11211 -t centminmod/docker-centos7-memcached

or allocate a custom memory limit and settings e.g. 512MB memory

Code:

docker run --name memc1 -d -p 33211:11211 -t centminmod/docker-centos7-memcached memcached -m 512

or allocate a custom memory limit and settings e.g. 512MB memory and 2 threads

Code:

docker run --name memc1 -d -p 33211:11211 -t centminmod/docker-centos7-memcached memcached -m 512 -t 2

to access container via bash if started with name = memc1

Code:

docker exec -ti memc1 /bin/bash

From host system connecting Memcached docker container's Memcached server stats via docker0 network interfaces IP address

Code:

ifconfig docker0 | grep 'inet '
inet addr:172.17.42.1  Bcast:0.0.0.0  Mask:255.255.0.0

Code:

memcached-tool 172.17.42.1:11211 stats
#172.17.42.1:11211 Field       Value
         accepting_conns           1
               auth_cmds           0
             auth_errors           0
                   bytes           0
              bytes_read           7
           bytes_written           0
              cas_badval           0
                cas_hits           0
              cas_misses           0
               cmd_flush           0
                 cmd_get           0
                 cmd_set           0
               cmd_touch           0
             conn_yields           0
   connection_structures           7
       crawler_reclaimed           0
        curr_connections           6
              curr_items           0
               decr_hits           0
             decr_misses           0
             delete_hits           0
           delete_misses           0
       evicted_unfetched           0
               evictions           0
       expired_unfetched           0
                get_hits           0
              get_misses           0
              hash_bytes      524288
       hash_is_expanding           0
        hash_power_level          16
               incr_hits           0
             incr_misses           0
                libevent 2.0.21-stable
          limit_maxbytes    67108864
     listen_disabled_num           0
       lrutail_reflocked           0
            malloc_fails           0
                     pid           1
            pointer_size          64
               reclaimed           0
            reserved_fds          10
           rusage_system    0.012998
             rusage_user    0.004999
   slab_reassign_running           0
             slabs_moved           0
                 threads           2
                    time  1424559801
       total_connections           7
             total_items           0
              touch_hits           0
            touch_misses           0
                  uptime          60
                 version      1.4.22

eva2000 · Feb 22, 2015

Twemperf aka mcperf memcached benchmarks against CentOS 7 Memcached Docker image instance - ended up with similar performance to CentOS 6.6 Memcached Docker image instance.

Code:

mcperf -s 172.17.42.1 -p 11211 --num-conns=5000 --conn-rate=20000 --sizes=0.01 --num-calls=10; echo; echo stats | nc 172.17.42.1 11211; echo

Total: connections 5000 requests 43560 responses 43560 test-duration 0.494 s

Connection rate: 10129.7 conn/s (0.1 ms/conn <= 4016 concurrent connections)
Connection time [ms]: avg 313.7 min 1.8 max 368.5 stddev 61.00
Connect time [ms]: avg 48.2 min 0.0 max 101.3 stddev 27.91

Request rate: 88250.0 req/s (0.0 ms/req)
Request size [B]: avg 129.0 min 129.0 max 129.0 stddev 0.00

Response rate: 88250.0 rsp/s (0.0 ms/rsp)
Response size [B]: avg 8.0 min 8.0 max 8.0 stddev 0.00
Response time [ms]: avg 26.5 min 0.0 max 69.8 stddev 0.01
Response time [ms]: p25 21.0 p50 25.0 p75 29.0
Response time [ms]: p95 62.0 p99 69.0 p999 70.0
Response type: stored 43560 not_stored 0 exists 0 not_found 0
Response type: num 0 deleted 0 end 0 value 0
Response type: error 0 client_error 0 server_error 0

Errors: total 644 client-timo 0 socket-timo 0 connrefused 0 connreset 644
Errors: fd-unavail 0 ftab-full 0 addrunavail 0 other 0

CPU time [s]: user 0.04 system 0.45 (user 7.9% system 91.4% total 99.3%)
Net I/O: bytes 5.7 MB rate 11806.9 KB/s (96.7*10^6 bps)


STAT pid 1
STAT uptime 10
STAT time 1424562851
STAT version 1.4.22
STAT libevent 2.0.21-stable
STAT pointer_size 64
STAT rusage_user 0.100984
STAT rusage_system 0.654900
STAT curr_connections 6
STAT total_connections 4363
STAT connection_structures 4080
STAT reserved_fds 10
STAT cmd_get 0
STAT cmd_set 43560
STAT cmd_flush 0
STAT cmd_touch 0
STAT get_hits 0
STAT get_misses 0
STAT delete_misses 0
STAT delete_hits 0
STAT incr_misses 0
STAT incr_hits 0
STAT decr_misses 0
STAT decr_hits 0
STAT cas_misses 0
STAT cas_hits 0
STAT cas_badval 0
STAT touch_hits 0
STAT touch_misses 0
STAT auth_cmds 0
STAT auth_errors 0
STAT bytes_read 5619246
STAT bytes_written 348480
STAT limit_maxbytes 67108864
STAT accepting_conns 1
STAT listen_disabled_num 1
STAT threads 2
STAT conn_yields 0
STAT hash_power_level 16
STAT hash_bytes 524288
STAT hash_is_expanding 0
STAT slab_reassign_running 0
STAT slabs_moved 0
STAT malloc_fails 0
STAT bytes 7797240
STAT curr_items 43560
STAT total_items 43560
STAT expired_unfetched 0
STAT evicted_unfetched 0
STAT evictions 0
STAT reclaimed 0
STAT crawler_reclaimed 0
STAT lrutail_reflocked 0
END

eva2000 · Feb 22, 2015

memtier_benchmark against CentOS 7.0 Memcached Docker container instance again similar performance to CentOS 6.6 Memcached Docker container instance.

Code:

c=50; time memtier_benchmark -P memcache_text -s 172.17.42.1 -p 11211 -c $c --random-data --data-size-range=4-204 --data-size-pattern=S --key-minimum=200 --key-maximum=400 --key-pattern=G:G --key-stddev=10 --key-median=300 2>&1 > memtier_benchmark.${c}.log; head -8 memtier_benchmark.${c}.log; echo; echo stats | nc 172.17.42.1 11211

real    0m13.014s
user    0m9.623s
sys     0m19.735s
4         Threads
50        Connections per thread
10000     Requests per thread
Type        Ops/sec     Hits/sec   Misses/sec      Latency       KB/sec
------------------------------------------------------------------------
Sets       16144.29          ---          ---      1.12900      2180.27
Gets      161265.44    152575.56      8689.88      1.12400     22842.00
Totals    177409.73    152575.56      8689.88      1.12500     25022.27

STAT pid 1
STAT uptime 20
STAT time 1424562878
STAT version 1.4.22
STAT libevent 2.0.21-stable
STAT pointer_size 64
STAT rusage_user 1.854718
STAT rusage_system 22.120637
STAT curr_connections 6
STAT total_connections 207
STAT connection_structures 206
STAT reserved_fds 10
STAT cmd_get 1818000
STAT cmd_set 182000
STAT cmd_flush 0
STAT cmd_touch 0
STAT get_hits 1720036
STAT get_misses 97964
STAT delete_misses 0
STAT delete_hits 0
STAT incr_misses 0
STAT incr_hits 0
STAT decr_misses 0
STAT decr_hits 0
STAT cas_misses 0
STAT cas_hits 0
STAT cas_badval 0
STAT touch_hits 0
STAT touch_misses 0
STAT auth_cmds 0
STAT auth_errors 0
STAT bytes_read 54618806
STAT bytes_written 234235722
STAT limit_maxbytes 67108864
STAT accepting_conns 1
STAT listen_disabled_num 0
STAT threads 2
STAT conn_yields 0
STAT hash_power_level 16
STAT hash_bytes 524288
STAT hash_is_expanding 0
STAT slab_reassign_running 0
STAT slabs_moved 0
STAT malloc_fails 0
STAT bytes 9982
STAT curr_items 55
STAT total_items 182000
STAT expired_unfetched 0
STAT evicted_unfetched 0
STAT evictions 0
STAT reclaimed 0
STAT crawler_reclaimed 0
STAT lrutail_reflocked 1083
END

eva2000 · Feb 22, 2015

Just optimized my resulting CentOS 7 Memcached server docker image size by 33% from 414MB to 274MB

Code:

docker images
REPOSITORY                      TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
centminmod-memcached7min        latest              xxx        2 minutes ago       274 MB
centminmod-memcached7           latest              yyy        14 hours ago        414.3 MB

eva2000 · Feb 23, 2015

Pushed CentOS 7 Memcached Docker Image to Quay.io repository quay.io/repository/centminmod/docker-centos7-memcached

Kyvaith · Jun 20, 2016

Hi,

Please check this docker: GitHub - million12/docker-nginx-php: Docker with Nginx / PHP-FPM 7, 5.6, 5.5. CentOS-7 based.

Those guys have done even more great job, have a look at their github profile:

million12/haproxy Docker image with HAProxy with ALPN and HTTP/2 support.

million12/nginx Docker image with Nginx with HTTP/2 support.

million12/nginx-php Docker image with PHP-FPM 5.6 and 7.0, based on million12/nginx.

million12/php-app-ssh side container with SSH for million12/nginx-php. Good while developing app inside million12/nginx-php and SSH access is needed for file changes upload.

Would be grate if you find some time to fork this code and add your optimizations form Centmin Mod. After creating webserver container, with could be multiplied for each vhost, we need Database docker (You've already started doing this), and Memcached one (also PoC ready).

In future, You could add optimized containers with Node.JS, Ruby etc.. Having OOB script for easy of use of HAProxy for loadbalancing, and ie. Kubernetes for autoscaling would be also terrific.

eva2000 · Jun 20, 2016

Yes it would be great unfortunately time, experience and priorities wise it can only be on my to do list as I only work on centmin mod in my spare time. But thanks for sharing those examples of docker usage

From my limited experience though docker performance wise can be lower

Would be nice to have more experienced docker folks chiming in and contributing eventually too though

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