Redisを使ってほんの少しだけAnsibleを高速化した
AnsibleにはGather Factsという機能があり、Ansible実行時に対象ホストの情報(facts)を取得しPlaybook内で使用することができます。
デフォルトだと取得したfactsは実行ノードのメモリに保持し、Ansible実行するたびに取得します。
取得にかかる時間はせいぜい1,2秒なのですが、対象ホストが多いときやPlaybook作成などで何度も実行すると少しストレスに感じる人もいるかもしれません。
今回は保存先をデフォルトのメモリからRedisに変更し、factsを再利用することで高速化を図ります。
環境
実行ノード: MacOS Mojave 10.14.5
対象ホスト: CentOS 7.5 on Vagrant
Ansible: 2.8.1
Redis: 5.0.5
Redis
今回は検証なのでDockerで作ってしまいます。
[koh@kohs-MBP] ~/vag_test % docker run -d -p 6379:6379 --name ansibleredis redis Unable to find image 'redis:latest' locally latest: Pulling from library/redis f5d23c7fed46: Pull complete a4a5c04dafc1: Pull complete 605bafc84bc9: Pull complete f07a4e35cd96: Pull complete 17944e5e3eb7: Pull complete 6f875a8605e0: Pull complete Digest: sha256:8888f6cd2509062a377e903e17777b4a6d59c92769f6807f034fa345da9eebcf Status: Downloaded newer image for redis:latest cbb0b15a703b2044b8a3d0d7b5b58f6dbd8d0b09d7b16bb5560cec57a221c39e [koh@kohs-MBP] ~/vag_test % docker container ls CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES cbb0b15a703b redis "docker-entrypoint.s…" 8 seconds ago Up 7 seconds 0.0.0.0:6379->6379/tcp ansibleredis [koh@kohs-MBP] ~/vag_test %
完了です。Dockerってすばらしいですね。
Ansible
公式サイトを参考にしてansible.cfgに下記設定を追加します。
https://docs.ansible.com/ansible/latest/plugins/cache.html
[koh@kohs-MBP] ~/vag_test % cat ansible.cfg [defaults] # cache pluginの指定 fact_caching = redis # cacheのkey名のプレフィックス fact_caching_prefix = ansible_facts_ # Redisの接続先情報(host:port) fact_caching_connection = localhost:6379 # cache情報の有効期限(s) fact_caching_timeout = 60 # cache管理のポリシー smartの場合は有効なcacheがあれば再取得せずにそれを参照する gathering = smart [koh@kohs-MBP] ~/vag_test %
timeoutの値は検証なので短めにしています。適宜変更ください。
Playbook
今回は検証用に下記のPlaybookを使用します。
gather_facts実行後にansible_hostnameを出力するPlaybookです。
[koh@kohs-MBP] ~/vag_test
% cat test.yml
---
- hosts: Vag1
gather_facts: True
tasks:
- name: debug
debug:
var: ansible_hostname
[koh@kohs-MBP] ~/vag_test
%
検証
デフォルト(メモリ)
まずは先程のfact_caching_xxxの設定をすべてコメントアウトしてデフォルトの状態で実行し, timeコマンドで時間を測定します。
[koh@kohs-MBP] ~/vag_test
% time ansible-playbook test.yml
PLAY [Vag1] *****************************************************************************************
TASK [Gathering Facts] ******************************************************************************
ok: [Vag1]
TASK [debug] ****************************************************************************************
ok: [Vag1] => {
"ansible_hostname": "Vag1"
}
PLAY RECAP ******************************************************************************************
Vag1 : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
ansible-playbook test.yml 1.02s user 0.30s system 67% cpu 1.955 total
[koh@kohs-MBP] ~/vag_test
%
一回の実行で約2秒かかります。
何度か実行しましたが大体1.8-2.0秒くらいに収束しました。
Redis
次にansible.cfgの設定を有効化して時間測定します。
[koh@kohs-MBP] ~/vag_test
% cat ansible.cfg
[defaults]
# cache pluginの指定
fact_caching = redis
# cacheのkey名のプレフィックス
fact_caching_prefix = ansible_facts_
# Redisの接続先情報(host:port)
fact_caching_connection = localhost:6379
# cache情報の有効期限(s)
fact_caching_timeout = 60
# cache管理のポリシー smartの場合は有効なcacheがあれば再取得せずにそれを参照する
gathering = smart
[koh@kohs-MBP] ~/vag_test
% time ansible-playbook test.yml
PLAY [Vag1] *****************************************************************************************
TASK [Gathering Facts] ******************************************************************************
ok: [Vag1]
TASK [debug] ****************************************************************************************
ok: [Vag1] => {
"ansible_hostname": "Vag1"
}
PLAY RECAP ******************************************************************************************
Vag1 : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
ansible-playbook test.yml 1.02s user 0.30s system 77% cpu 1.713 total
[koh@kohs-MBP] ~/vag_test
% time ansible-playbook test.yml
PLAY [Vag1] *****************************************************************************************
TASK [debug] ****************************************************************************************
ok: [Vag1] => {
"ansible_hostname": "Vag1"
}
PLAY RECAP ******************************************************************************************
Vag1 : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
ansible-playbook test.yml 0.69s user 0.20s system 97% cpu 0.901 total
[koh@kohs-MBP] ~/vag_test
%
有効化したあとの初回実行はfactsを取得するためデフォルトの状態とほぼ同じ時間ですが、2回目の実行では0.9秒と約0.8秒速くなっています。
Redis側の挙動確認
ここでRedisにどのように情報が格納されているか確認してみます。
[koh@kohs-MBP] ~/vag_test % docker exec -it ansibleredis redis-cli 127.0.0.1:6379> keys * 1) "ansible_facts_Vag1" 2) "ansible_cache_keys" 127.0.0.1:6379>
keyはansible_cache_keysと{{fact_cache_prefix}}{{hostname}}の2つが登録されています。
[koh@kohs-MBP] ~/vag_test % docker exec -it ansibleredis redis-cli 127.0.0.1:6379> ZRANGE ansible_cache_keys 0 -1 1) "Vag1" 127.0.0.1:6379>
ansible_cache_keysにはcacheしてるホストの一覧が入ってます。
今回はターゲットが1台だけなので1台のホスト名が値に入ってます。
[koh@kohs-MBP] ~/vag_test
% docker exec -it ansibleredis redis-cli
127.0.0.1:6379> get ansible_facts_Vag1
"{\n \"_ansible_facts_gathered\": true,\n \"ansible_all_ipv4_addresses\": [\n \"10.0.2.15\",\n \"192.168.33.11\"\n ],\n \"ansible_all_ipv6_addresses\": [\n \"fe80::590e:8e97:c90c:cc33\",\n \"fe80::a00:27ff:fe71:612b\"\n ],\n \"ansible_apparmor\": {\n \"status\": \"disabled\"\n },\n \"ansible_architecture\": \"x86_64\",\n \"ansible_bios_date\": \"12/01/2006\",\n \"ansible_bios_version\": \"VirtualBox\",\n \"ansible_cmdline\": {\n \"BOOT_IMAGE\": \"/vmlinuz-3.10.0-862.11.6.el7.x86_64\",\n \"LANG\": \"en_US.UTF-8\",\n \"biosdevname\": \"0\",\n \"crashkernel\": \"auto\",\n \"net.ifnames\": \"0\",\n \"quiet\": true,\n \"rd.lvm.lv\": \"centos/swap\",\n \"rhgb\": true,\n \"ro\": true,\n \"root\": \"/dev/mapper/centos-root\"\n },\n \"ansible_date_time\": {\n \"date\": \"2019-07-17\",\n \"day\": \"17\",\n \"epoch\": \"1563371875\",\n \"hour\": \"22\",\n \"iso8601\": \"2019-07-17T13:57:55Z\",\n \"iso8601_basic\": \"20190717T225755697435\",\n \"iso8601_basic_short\": \"20190717T225755\",\n \"iso8601_micro\": \"2019-07-17T13:57:55.697505Z\",\n \"minute\": \"57\",\n \"month\": \"07\",\n \"second\": \"55\",\n \"time\": \"22:57:55\",\n \"tz\": \"JST\",\n \"tz_offset\": \"+0900\",\n \"weekday\": \"Wednesday\",\n \"weekday_number\": \"3\",\n \"weeknumber\": \"28\",\n \"year\": \"2019\"\n },\n \"ansible_default_ipv4\": {\n \"address\": \"10.0.2.15\",\n \"alias\": \"eth0\",\n \"broadcast\": \"10.0.2.255\",\n \"gateway\": \"10.0.2.2\",\n \"interface\": \"eth0\",\n \"macaddress\": \"08:00:27:8b:c9:3f\",\n \"mtu\": 1500,\n \"netmask\": \"255.255.255.0\",\n \"network\": \"10.0.2.0\",\n \"type\": \"ether\"\n },\n \"ansible_default_ipv6\": {},\n \"ansible_device_links\": {\n \"ids\": {\n \"dm-0\": [\n \"dm-name-centos-root\",\n \"dm-uuid-LVM-cXud4zK75fureDdfCQfo5enloeKDIc3rbL1yYbzzPZGdVlveHAelfn7TdiL4PPMK\"\n ],\n \"dm-1\": [\n \"dm-name-centos-swap\",\n \"dm-uuid-LVM-cXud4zK75fureDdfCQfo5enloeKDIc3r5Se12VYk5F7OofGC3mzqUxBtHLOc6f0i\"\n ],\n \"dm-2\": [\n \"dm-name-centos-home\",\n \"dm-uuid-LVM-cXud4zK75fureDdfCQfo5enloeKDIc3rBnDGTj2yA0ImV13Ife64zvRL20DXAcBp\"\n ],\n \"sda\": [\n \"ata-VBOX_HARDDISK_VB1c9995b6-54c424af\"\n ],\n \"sda1\": [\n \"ata-VBOX_HARDDISK_VB1c9995b6-54c424af-part1\"\n ],\n \"sda2\": [\n \"ata-VBOX_HARDDISK_VB1c9995b6-54c424af-part2\",\n \"lvm-pv-uuid-xkveE6-q5bs-AFQm-GG2X-lWDs-nZNn-v1DuLs\"\n ]\n },\n \"labels\": {},\n \"masters\": {\n \"sda2\": [\n \"dm-0\",\n \"dm-1\",\n \"dm-2\"\n ]\n },\n \"uuids\": {\n \"dm-0\": [\n \"214cf212-d7f8-41fe-89a4-6b5e1f1d469c\"\n ],\n \"dm-1\": [\n \"0f5a6474-6d09-4220-8eb4-f97e79b41ea0\"\n ],\n \"dm-2\": [\n \"0fb2cf77-ad36-4728-a3f5-b53dc134e3fd\"\n ],\n \"sda1\": [\n \"ec9d8bfa-8da0-43ce-b469-f0178aa904b5\"\n ]\n }\n },\n \"ansible_devices\": {\n \"dm-0\": {\n \"holders\": [],\n \"host\": \"\",\n \"links\": {\n \"ids\": [\n \"dm-name-centos-root\",\n \"dm-uuid-LVM-cXud4zK75fureDdfCQfo5enloeKDIc3rbL1yYbzzPZGdVlveHAelfn7TdiL4PPMK\"\n ],\n \"labels\": [],\n \"masters\": [],\n \"uuids\": [\n \"214cf212-d7f8-41fe-89a4-6b5e1f1d469c\"\n ]\n },\n \"model\": null,\n \"partitions\": {},\n \"removable\": \"0\",\n \"rotational\": \"1\",\n \"sas_address\": null,\n \"sas_device_handle\": null,\n \"scheduler_mode\": \"\",\n \"sectors\": \"85950464\",\n \"sectorsize\": \"512\",\n \"size\": \"40.98 GB\",\n \"support_discard\": \"0\",\n \"vendor\": null,\n \"virtual\": 1\n },\n \"dm-1\": {\n \"holders\": [],\n \"host\": \"\",\n \"links\": {\n \"ids\": [\n \"dm-name-centos-swap\",\n \"dm-uuid-LVM-cXud4zK75fureDdfCQfo5enloeKDIc3r5Se12VYk5F7OofGC3mzqUxBtHLOc6f0i\"\n ],\n \"labels\": [],\n \"masters\": [],\n \"uuids\": [\n \"0f5a6474-6d09-4220-8eb4-f97e79b41ea0\"\n ]\n },\n \"model\": null,\n \"partitions\": {},\n \"removable\": \"0\",\n \"rotational\": \"1\",\n \"sas_address\": null,\n \"sas_device_handle\": null,\n \"scheduler_mode\": \"\",\n \"sectors\": \"4194304\",\n \"sectorsize\": \"512\",\n \"size\": \"2.00 GB\",\n \"support_discard\": \"0\",\n \"vendor\": null,\n \"virtual\": 1\n },\n \"dm-2\": {\n \"holders\": [],\n \"host\": \"\",\n \"links\": {\n \"ids\": [\n \"dm-name-centos-home\",\n \"dm-uuid-LVM-cXud4zK75fureDdfCQfo5enloeKDIc3rBnDGTj2yA0ImV13Ife64zvRL20DXAcBp\"\n ],\n \"labels\": [],\n \"masters\": [],\n \"uuids\": [\n \"0fb2cf77-ad36-4728-a3f5-b53dc134e3fd\"\n ]\n },\n \"model\": null,\n \"partitions\": {},\n \"removable\": \"0\",\n \"rotational\": \"1\",\n \"sas_address\": null,\n \"sas_device_handle\": null,\n \"scheduler_mode\": \"\",\n \"sectors\": \"41959424\",\n \"sectorsize\": \"512\",\n \"size\": \"20.01 GB\",\n \"support_discard\": \"0\",\n \"vendor\": null,\n \"virtual\": 1\n },\n \"sda\": {\n \"holders\": [],\n \"host\": \"\",\n \"links\": {\n \"ids\": [\n \"ata-VBOX_HARDDISK_VB1c9995b6-54c424af\"\n ],\n \"labels\": [],\n \"masters\": [],\n \"uuids\": []\n },\n \"model\": \"VBOX HARDDISK\",\n \"partitions\": {\n \"sda1\": {\n \"holders\": [],\n \"links\": {\n \"ids\": [\n \"ata-VBOX_HARDDISK_VB1c9995b6-54c424af-part1\"\n ],\n \"labels\": [],\n \"masters\": [],\n \"uuids\": [\n \"ec9d8bfa-8da0-43ce-b469-f0178aa904b5\"\n ]\n },\n \"sectors\": \"2097152\",\n \"sectorsize\": 512,\n \"size\": \"1.00 GB\",\n \"start\": \"2048\",\n \"uuid\": \"ec9d8bfa-8da0-43ce-b469-f0178aa904b5\"\n },\n \"sda2\": {\n \"holders\": [\n \"centos-root\",\n \"centos-swap\",\n \"centos-home\"\n ],\n \"links\": {\n \"ids\": [\n \"ata-VBOX_HARDDISK_VB1c9995b6-54c424af-part2\",\n \"lvm-pv-uuid-xkveE6-q5bs-AFQm-GG2X-lWDs-nZNn-v1DuLs\"\n ],\n \"labels\": [],\n \"masters\": [\n \"dm-0\",\n \"dm-1\",\n \"dm-2\"\n ],\n \"uuids\": []\n },\n \"sectors\": \"132118528\",\n \"sectorsize\": 512,\n \"size\": \"63.00 GB\",\n \"start\": \"2099200\",\n \"uuid\": null\n }\n },\n \"removable\": \"0\",\n \"rotational\": \"1\",\n \"sas_address\": null,\n \"sas_device_handle\": null,\n \"scheduler_mode\": \"deadline\",\n \"sectors\": \"134217728\",\n \"sectorsize\": \"512\",\n \"size\": \"64.00 GB\",\n \"support_discard\": \"0\",\n \"vendor\": \"ATA\",\n \"virtual\": 1\n }\n },\n \"ansible_distribution\": \"CentOS\",\n \"ansible_distribution_file_parsed\": true,\n \"ansible_distribution_file_path\": \"/etc/redhat-release\",\n \"ansible_distribution_file_variety\": \"RedHat\",\n \"ansible_distribution_major_version\": \"7\",\n \"ansible_distribution_release\": \"Core\",\n \"ansible_distribution_version\": \"7\",\n \"ansible_dns\": {},\n \"ansible_domain\": \"\",\n \"ansible_effective_group_id\": 1000,\n \"ansible_effective_user_id\": 1000,\n \"ansible_env\": {\n \"HOME\": \"/home/vagrant\",\n \"LANG\": \"C\",\n \"LC_ALL\": \"C\",\n \"LC_CTYPE\": \"UTF-8\",\n \"LC_MESSAGES\": \"C\",\n \"LOGNAME\": \"vagrant\",\n \"MAIL\": \"/var/mail/vagrant\",\n \"PATH\": \"/usr/local/bin:/usr/bin\",\n \"PWD\": \"/home/vagrant\",\n \"SELINUX_LEVEL_REQUESTED\": \"\",\n \"SELINUX_ROLE_REQUESTED\": \"\",\n \"SELINUX_USE_CURRENT_RANGE\": \"\",\n \"SHELL\": \"/usr/bin/zsh\",\n \"SHLVL\": \"1\",\n \"SSH_CLIENT\": \"192.168.33.1 57299 22\",\n \"SSH_CONNECTION\": \"192.168.33.1 57299 192.168.33.11 22\",\n \"SSH_TTY\": \"/dev/pts/0\",\n \"TERM\": \"xterm-256color\",\n \"USER\": \"vagrant\",\n \"XDG_RUNTIME_DIR\": \"/run/user/1000\",\n \"XDG_SESSION_ID\": \"17\",\n \"_\": \"/usr/bin/python\"\n },\n \"ansible_eth0\": {\n \"active\": true,\n \"device\": \"eth0\",\n \"features\": {\n \"busy_poll\": \"off [fixed]\",\n \"fcoe_mtu\": \"off [fixed]\",\n \"generic_receive_offload\": \"on\",\n \"generic_segmentation_offload\": \"on\",\n \"highdma\": \"off [fixed]\",\n \"hw_tc_offload\": \"off [fixed]\",\n \"l2_fwd_offload\": \"off [fixed]\",\n \"large_receive_offload\": \"off [fixed]\",\n \"loopback\": \"off [fixed]\",\n \"netns_local\": \"off [fixed]\",\n \"ntuple_filters\": \"off [fixed]\",\n \"receive_hashing\": \"off [fixed]\",\n \"rx_all\": \"off\",\n \"rx_checksumming\": \"off\",\n \"rx_fcs\": \"off\",\n \"rx_udp_tunnel_port_offload\": \"off [fixed]\",\n \"rx_vlan_filter\": \"on [fixed]\",\n \"rx_vlan_offload\": \"on\",\n \"rx_vlan_stag_filter\": \"off [fixed]\",\n \"rx_vlan_stag_hw_parse\": \"off [fixed]\",\n \"scatter_gather\": \"on\",\n \"tcp_segmentation_offload\": \"on\",\n \"tx_checksum_fcoe_crc\": \"off [fixed]\",\n \"tx_checksum_ip_generic\": \"on\",\n \"tx_checksum_ipv4\": \"off [fixed]\",\n \"tx_checksum_ipv6\": \"off [fixed]\",\n \"tx_checksum_sctp\": \"off [fixed]\",\n \"tx_checksumming\": \"on\",\n \"tx_fcoe_segmentation\": \"off [fixed]\",\n \"tx_gre_csum_segmentation\": \"off [fixed]\",\n \"tx_gre_segmentation\": \"off [fixed]\",\n \"tx_gso_partial\": \"off [fixed]\",\n \"tx_gso_robust\": \"off [fixed]\",\n \"tx_ipip_segmentation\": \"off [fixed]\",\n \"tx_lockless\": \"off [fixed]\",\n \"tx_nocache_copy\": \"off\",\n \"tx_scatter_gather\": \"on\",\n \"tx_scatter_gather_fraglist\": \"off [fixed]\",\n \"tx_sctp_segmentation\": \"off [fixed]\",\n \"tx_sit_segmentation\": \"off [fixed]\",\n \"tx_tcp6_segmentation\": \"off [fixed]\",\n \"tx_tcp_ecn_segmentation\": \"off [fixed]\",\n \"tx_tcp_mangleid_segmentation\": \"off\",\n \"tx_tcp_segmentation\": \"on\",\n \"tx_udp_tnl_csum_segmentation\": \"off [fixed]\",\n \"tx_udp_tnl_segmentation\": \"off [fixed]\",\n \"tx_vlan_offload\": \"on [fixed]\",\n \"tx_vlan_stag_hw_insert\": \"off [fixed]\",\n \"udp_fragmentation_offload\": \"off [fixed]\",\n \"vlan_challenged\": \"off [fixed]\"\n },\n \"hw_timestamp_filters\": [],\n \"ipv4\": {\n \"address\": \"10.0.2.15\",\n \"broadcast\": \"10.0.2.255\",\n \"netmask\": \"255.255.255.0\",\n \"network\": \"10.0.2.0\"\n },\n \"ipv6\": [\n {\n \"address\": \"fe80::590e:8e97:c90c:cc33\",\n \"prefix\": \"64\",\n \"scope\": \"link\"\n }\n ],\n \"macaddress\": \"08:00:27:8b:c9:3f\",\n \"module\": \"e1000\",\n \"mtu\": 1500,\n \"pciid\": \"0000:00:03.0\",\n \"promisc\": false,\n \"speed\": 1000,\n \"timestamping\": [\n \"tx_software\",\n \"rx_software\",\n \"software\"\n ],\n \"type\": \"ether\"\n },\n \"ansible_eth1\": {\n \"active\": true,\n \"device\": \"eth1\",\n \"features\": {\n \"busy_poll\": \"off [fixed]\",\n \"fcoe_mtu\": \"off [fixed]\",\n \"generic_receive_offload\": \"on\",\n \"generic_segmentation_offload\": \"on\",\n \"highdma\": \"off [fixed]\",\n \"hw_tc_offload\": \"off [fixed]\",\n \"l2_fwd_offload\": \"off [fixed]\",\n \"large_receive_offload\": \"off [fixed]\",\n \"loopback\": \"off [fixed]\",\n \"netns_local\": \"off [fixed]\",\n \"ntuple_filters\": \"off [fixed]\",\n \"receive_hashing\": \"off [fixed]\",\n \"rx_all\": \"off\",\n \"rx_checksumming\": \"off\",\n \"rx_fcs\": \"off\",\n \"rx_udp_tunnel_port_offload\": \"off [fixed]\",\n \"rx_vlan_filter\": \"on [fixed]\",\n \"rx_vlan_offload\": \"on\",\n \"rx_vlan_stag_filter\": \"off [fixed]\",\n \"rx_vlan_stag_hw_parse\": \"off [fixed]\",\n \"scatter_gather\": \"on\",\n \"tcp_segmentation_offload\": \"on\",\n \"tx_checksum_fcoe_crc\": \"off [fixed]\",\n \"tx_checksum_ip_generic\": \"on\",\n \"tx_checksum_ipv4\": \"off [fixed]\",\n \"tx_checksum_ipv6\": \"off [fixed]\",\n \"tx_checksum_sctp\": \"off [fixed]\",\n \"tx_checksumming\": \"on\",\n \"tx_fcoe_segmentation\": \"off [fixed]\",\n \"tx_gre_csum_segmentation\": \"off [fixed]\",\n \"tx_gre_segmentation\": \"off [fixed]\",\n \"tx_gso_partial\": \"off [fixed]\",\n \"tx_gso_robust\": \"off [fixed]\",\n \"tx_ipip_segmentation\": \"off [fixed]\",\n \"tx_lockless\": \"off [fixed]\",\n \"tx_nocache_copy\": \"off\",\n \"tx_scatter_gather\": \"on\",\n \"tx_scatter_gather_fraglist\": \"off [fixed]\",\n \"tx_sctp_segmentation\": \"off [fixed]\",\n \"tx_sit_segmentation\": \"off [fixed]\",\n \"tx_tcp6_segmentation\": \"off [fixed]\",\n \"tx_tcp_ecn_segmentation\": \"off [fixed]\",\n \"tx_tcp_mangleid_segmentation\": \"off\",\n \"tx_tcp_segmentation\": \"on\",\n \"tx_udp_tnl_csum_segmentation\": \"off [fixed]\",\n \"tx_udp_tnl_segmentation\": \"off [fixed]\",\n \"tx_vlan_offload\": \"on [fixed]\",\n \"tx_vlan_stag_hw_insert\": \"off [fixed]\",\n \"udp_fragmentation_offload\": \"off [fixed]\",\n \"vlan_challenged\": \"off [fixed]\"\n },\n \"hw_timestamp_filters\": [],\n \"ipv4\": {\n \"address\": \"192.168.33.11\",\n \"broadcast\": \"192.168.33.255\",\n \"netmask\": \"255.255.255.0\",\n \"network\": \"192.168.33.0\"\n },\n \"ipv6\": [\n {\n \"address\": \"fe80::a00:27ff:fe71:612b\",\n \"prefix\": \"64\",\n \"scope\": \"link\"\n }\n ],\n \"macaddress\": \"08:00:27:71:61:2b\",\n \"module\": \"e1000\",\n \"mtu\": 1500,\n \"pciid\": \"0000:00:08.0\",\n \"promisc\": false,\n \"speed\": 1000,\n \"timestamping\": [\n \"tx_software\",\n \"rx_software\",\n \"software\"\n ],\n \"type\": \"ether\"\n },\n \"ansible_fibre_channel_wwn\": [],\n \"ansible_fips\": false,\n \"ansible_form_factor\": \"Other\",\n \"ansible_fqdn\": \"Vag1\",\n \"ansible_hostname\": \"Vag1\",\n \"ansible_hostnqn\": \"\",\n \"ansible_interfaces\": [\n \"lo\",\n \"eth1\",\n \"eth0\"\n ],\n \"ansible_is_chroot\": true,\n \"ansible_iscsi_iqn\": \"\",\n \"ansible_kernel\": \"3.10.0-862.11.6.el7.x86_64\",\n \"ansible_lo\": {\n \"active\": true,\n \"device\": \"lo\",\n \"features\": {\n \"busy_poll\": \"off [fixed]\",\n \"fcoe_mtu\": \"off [fixed]\",\n \"generic_receive_offload\": \"on\",\n \"generic_segmentation_offload\": \"on\",\n \"highdma\": \"on [fixed]\",\n \"hw_tc_offload\": \"off [fixed]\",\n \"l2_fwd_offload\": \"off [fixed]\",\n \"large_receive_offload\": \"off [fixed]\",\n \"loopback\": \"on [fixed]\",\n \"netns_local\": \"on [fixed]\",\n \"ntuple_filters\": \"off [fixed]\",\n \"receive_hashing\": \"off [fixed]\",\n \"rx_all\": \"off [fixed]\",\n \"rx_checksumming\": \"on [fixed]\",\n \"rx_fcs\": \"off [fixed]\",\n \"rx_udp_tunnel_port_offload\": \"off [fixed]\",\n \"rx_vlan_filter\": \"off [fixed]\",\n \"rx_vlan_offload\": \"off [fixed]\",\n \"rx_vlan_stag_filter\": \"off [fixed]\",\n \"rx_vlan_stag_hw_parse\": \"off [fixed]\",\n \"scatter_gather\": \"on\",\n \"tcp_segmentation_offload\": \"on\",\n \"tx_checksum_fcoe_crc\": \"off [fixed]\",\n \"tx_checksum_ip_generic\": \"on [fixed]\",\n \"tx_checksum_ipv4\": \"off [fixed]\",\n \"tx_checksum_ipv6\": \"off [fixed]\",\n \"tx_checksum_sctp\": \"on [fixed]\",\n \"tx_checksumming\": \"on\",\n \"tx_fcoe_segmentation\": \"off [fixed]\",\n \"tx_gre_csum_segmentation\": \"off [fixed]\",\n \"tx_gre_segmentation\": \"off [fixed]\",\n \"tx_gso_partial\": \"off [fixed]\",\n \"tx_gso_robust\": \"off [fixed]\",\n \"tx_ipip_segmentation\": \"off [fixed]\",\n \"tx_lockless\": \"on [fixed]\",\n \"tx_nocache_copy\": \"off [fixed]\",\n \"tx_scatter_gather\": \"on [fixed]\",\n \"tx_scatter_gather_fraglist\": \"on [fixed]\",\n \"tx_sctp_segmentation\": \"on\",\n \"tx_sit_segmentation\": \"off [fixed]\",\n \"tx_tcp6_segmentation\": \"on\",\n \"tx_tcp_ecn_segmentation\": \"on\",\n \"tx_tcp_mangleid_segmentation\": \"on\",\n \"tx_tcp_segmentation\": \"on\",\n \"tx_udp_tnl_csum_segmentation\": \"off [fixed]\",\n \"tx_udp_tnl_segmentation\": \"off [fixed]\",\n \"tx_vlan_offload\": \"off [fixed]\",\n \"tx_vlan_stag_hw_insert\": \"off [fixed]\",\n \"udp_fragmentation_offload\": \"on\",\n \"vlan_challenged\": \"on [fixed]\"\n },\n \"hw_timestamp_filters\": [],\n \"ipv4\": {\n \"address\": \"127.0.0.1\",\n \"broadcast\": \"host\",\n \"netmask\": \"255.0.0.0\",\n \"network\": \"127.0.0.0\"\n },\n \"ipv6\": [\n {\n \"address\": \"::1\",\n \"prefix\": \"128\",\n \"scope\": \"host\"\n }\n ],\n \"mtu\": 65536,\n \"promisc\": false,\n \"timestamping\": [\n \"rx_software\",\n \"software\"\n ],\n \"type\": \"loopback\"\n },\n \"ansible_local\": {},\n \"ansible_lsb\": {},\n \"ansible_machine\": \"x86_64\",\n \"ansible_machine_id\": \"b8ae4e7c6e42490b801633d8d903c9a0\",\n \"ansible_memfree_mb\": 769,\n \"ansible_memory_mb\": {\n \"nocache\": {\n \"free\": 874,\n \"used\": 117\n },\n \"real\": {\n \"free\": 769,\n \"total\": 991,\n \"used\": 222\n },\n \"swap\": {\n \"cached\": 0,\n \"free\": 2047,\n \"total\": 2047,\n \"used\": 0\n }\n },\n \"ansible_memtotal_mb\": 991,\n \"ansible_mounts\": [\n {\n \"block_available\": 226495,\n \"block_size\": 4096,\n \"block_total\": 259584,\n \"block_used\": 33089,\n \"device\": \"/dev/sda1\",\n \"fstype\": \"xfs\",\n \"inode_available\": 523962,\n \"inode_total\": 524288,\n \"inode_used\": 326,\n \"mount\": \"/boot\",\n \"options\": \"rw,seclabel,relatime,attr2,inode64,noquota\",\n \"size_available\": 927723520,\n \"size_total\": 1063256064,\n \"uuid\": \"ec9d8bfa-8da0-43ce-b469-f0178aa904b5\"\n },\n {\n \"block_available\": 10398487,\n \"block_size\": 4096,\n \"block_total\": 10738562,\n \"block_used\": 340075,\n \"device\": \"/dev/mapper/centos-root\",\n \"fstype\": \"xfs\",\n \"inode_available\": 21453369,\n \"inode_total\": 21487616,\n \"inode_used\": 34247,\n \"mount\": \"/\",\n \"options\": \"rw,seclabel,relatime,attr2,inode64,noquota\",\n \"size_available\": 42592202752,\n \"size_total\": 43985149952,\n \"uuid\": \"214cf212-d7f8-41fe-89a4-6b5e1f1d469c\"\n },\n {\n \"block_available\": 5233400,\n \"block_size\": 4096,\n \"block_total\": 5242367,\n \"block_used\": 8967,\n \"device\": \"/dev/mapper/centos-home\",\n \"fstype\": \"xfs\",\n \"inode_available\": 10489816,\n \"inode_total\": 10489856,\n \"inode_used\": 40,\n \"mount\": \"/home\",\n \"options\": \"rw,seclabel,relatime,attr2,inode64,noquota\",\n \"size_available\": 21436006400,\n \"size_total\": 21472735232,\n \"uuid\": \"0fb2cf77-ad36-4728-a3f5-b53dc134e3fd\"\n }\n ],\n \"ansible_nodename\": \"Vag1\",\n \"ansible_os_family\": \"RedHat\",\n \"ansible_pkg_mgr\": \"yum\",\n \"ansible_proc_cmdline\": {\n \"BOOT_IMAGE\": \"/vmlinuz-3.10.0-862.11.6.el7.x86_64\",\n \"LANG\": \"en_US.UTF-8\",\n \"biosdevname\": \"0\",\n \"crashkernel\": \"auto\",\n \"net.ifnames\": \"0\",\n \"quiet\": true,\n \"rd.lvm.lv\": [\n \"centos/root\",\n \"centos/swap\"\n ],\n \"rhgb\": true,\n \"ro\": true,\n \"root\": \"/dev/mapper/centos-root\"\n },\n \"ansible_processor\": [\n \"0\",\n \"GenuineIntel\",\n \"Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz\"\n ],\n \"ansible_processor_cores\": 1,\n \"ansible_processor_count\": 1,\n \"ansible_processor_threads_per_core\": 1,\n \"ansible_processor_vcpus\": 1,\n \"ansible_product_name\": \"VirtualBox\",\n \"ansible_product_serial\": \"NA\",\n \"ansible_product_uuid\": \"NA\",\n \"ansible_product_version\": \"1.2\",\n \"ansible_python\": {\n \"executable\": \"/usr/bin/python\",\n \"has_sslcontext\": true,\n \"type\": \"CPython\",\n \"version\": {\n \"major\": 2,\n \"micro\": 5,\n \"minor\": 7,\n \"releaselevel\": \"final\",\n \"serial\": 0\n },\n \"version_info\": [\n 2,\n 7,\n 5,\n \"final\",\n 0\n ]\n },\n \"ansible_python_version\": \"2.7.5\",\n \"ansible_real_group_id\": 1000,\n \"ansible_real_user_id\": 1000,\n \"ansible_selinux\": {\n \"config_mode\": \"enforcing\",\n \"mode\": \"enforcing\",\n \"policyvers\": 31,\n \"status\": \"enabled\",\n \"type\": \"targeted\"\n },\n \"ansible_selinux_python_present\": true,\n \"ansible_service_mgr\": \"systemd\",\n \"ansible_ssh_host_key_ecdsa_public\": \"AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBA5XlGiLVt6/NnCPwaH89VKPo+cvKjyzwnje1z9LkaiFXRNhWTsxYsMYPjx5cf5HQbJs4VCKIaPxK20QFYSabLc=\",\n \"ansible_ssh_host_key_ed25519_public\": \"AAAAC3NzaC1lZDI1NTE5AAAAIGhrt2KMmJ0a2QdNNsFElTnHSdhufURJmAIo39+5R1hP\",\n \"ansible_ssh_host_key_rsa_public\": \"AAAAB3NzaC1yc2EAAAADAQABAAABAQC99JJpb04/QLprQKr1Duz7dBfAHvbwuaouvVkMPKVoxQ7u2xUiTqKMWwckPBw3GfRC+soM6KXj+WnaIFsIFmYBYOwN1dl4ldpJxvp/+rz4VUvOsjqiAK6Ju7Hi2zlvN/Cz8n8NMC7+BT295s1jGYJU7SGVVJ/uLDVoiDa/dcptk17V4bgN8Wqe3hiEDbtbRMgZdwQ01o8b1uM6GQAAbz1S6kwnZ3fOXHU7Z29lZu2g5/xIYX48yhV8YnqwWmI2+i0zd06b+HoXwQH2+OVlZEMfv2Gc+xp4E0Pqu6VDyOPJGIkRuV0aBX6qT/6FDBUWvcGXs7gVdUL2wdvi5V8uf/rV\",\n \"ansible_swapfree_mb\": 2047,\n \"ansible_swaptotal_mb\": 2047,\n \"ansible_system\": \"Linux\",\n \"ansible_system_capabilities\": [\n \"\"\n ],\n \"ansible_system_capabilities_enforced\": \"True\",\n \"ansible_system_vendor\": \"innotek GmbH\",\n \"ansible_uptime_seconds\": 3839,\n \"ansible_user_dir\": \"/home/vagrant\",\n \"ansible_user_gecos\": \"vagrant\",\n \"ansible_user_gid\": 1000,\n \"ansible_user_id\": \"vagrant\",\n \"ansible_user_shell\": \"/usr/bin/zsh\",\n \"ansible_user_uid\": 1000,\n \"ansible_userspace_architecture\": \"x86_64\",\n \"ansible_userspace_bits\": \"64\",\n \"ansible_virtualization_role\": \"guest\",\n \"ansible_virtualization_type\": \"virtualbox\",\n \"discovered_interpreter_python\": \"/usr/bin/python\",\n \"gather_subset\": [\n \"all\"\n ],\n \"module_setup\": true\n}"
127.0.0.1:6379>
このようにfactsが値に格納されています。
実行直後にttlを確認するとfact_caching_timeoutの値が設定されています。
[koh@kohs-MBP] ~/vag_test % docker exec -it ansibleredis redis-cli 127.0.0.1:6379> ttl ansible_facts_Vag1 (integer) 57 127.0.0.1:6379>
まとめ
約0.8秒とほんの少しだけAnsibleを高速化することができました。
僅かではありますが何度もAnsibleを実行する際や大量のホストに実行する際には有効かもしれません。
なおRedisがダウンしてしまうとAnsibleはエラーになって実行できなくなってしまうため、本番でのCD/CI等に組み込む際にはRedisの可用性を考慮する必要がありますのでお気をつけください。
