task, drill, coredns を試してみた。
task
make コマンドの代替を目指している task というコマンドが存在するようなので試してみる。
https://github.com/go-task/task
軽く見た感じ、make で辛い変数化周りをきちんと整理していたり、include できるようにしてあって連携が考えられていたりと便利そう。 本当に make じゃなくてこれが普及してほしい。make は変数の受け渡しがめんどくさすぎる..。
version: '3' tasks: status: cmds: - aws ec2 describe-instance-status | jq -r ".InstanceStatuses[] | select(.InstanceState.Name == \"running\") | .InstanceId" | xargs aws ec2 describe-instances --instance-id | jq -r ".Reservations[].Instances[] | [.InstanceId,.Tags[].Value,.PublicIpAddress,.PrivateIpAddress] | @csv" status-onlyips: cmds: - aws ec2 describe-instance-status | jq -r ".InstanceStatuses[] | select(.InstanceState.Name == \"running\") | .InstanceId" | xargs aws ec2 describe-instances --instance-id | jq -r ".Reservations[].Instances[] | .PublicIpAddress" watch-status: cmds: - watch task status includes: sub: ./TaskfileSub.yml
tasks 以下に上記のようにコマンドを列挙できる。便利なのは includes で include した Taskfile の task も呼び出せること。 記述していないが、include した際のタスクを実行するディレクトリも指定できるのでらくらく。
# TaskfileSub.yml version: '3' tasks: echo-os: deps: [echo-env] cmds: - echo {{OS}} echo-env: vars: VAR: abc! VAR2: sh: uuidgen cmds: - echo "environment variables" - echo {{.VAR}} - echo {{.VAR2}} echo-args: cmds: - echo {{.CLI_ARGS}}
$ task sub:echo-os task: [sub:echo-env] echo "environment variables" environment variables task: [sub:echo-env] echo abc! abc! task: [sub:echo-env] echo 8BDD785D-97F1-4D84-B404-D45B054F0DED 8BDD785D-97F1-4D84-B404-D45B054F0DED task: [sub:echo-os] echo darwin darwin $ task sub:echo-args -- this is passed from args task: [sub:echo-args] echo this is passed from args this is passed from args
かなり便利。自前で使っている Makefile 全部これで書き直します...。
drill
JMeter の置き換えを目指す rust 製の負荷計測ツール。軽く README を見たところでは、簡単な yaml を記述するだけで柔軟なシナリオを記述可能で非常に良さそう。
https://github.com/fcsonline/drill
https://httpbin.org/ を対象にやってみる。
concurrency: 3 base: 'https://httpbin.org/' iterations: 3 rampup: 3 plan: - name: basic auth request: url: /basic-auth/k-jun/password headers: Authorization: 'Basic ay1qdW46cGFzc3dvcmQ=' assign: basicauth - name: post todo request: url: /post method: POST headers: Content-Type: 'application/json' body: '{"id": "2aa068b7-890d-341c-970f-e75ed5e152d1", "title": "facilis", "body": "Reprehenderit tenetur qui sunt. Consequatur possimus soluta nihil est velit hic maiores. Placeat at voluptatem deserunt laudantium maxime rerum illo."}' assign: createdTodo - name: get todo request: url: /get?id={{ createdTodo.body.json.id }} - name: put todo request: url: /put method: PUT headers: Content-Type: 'application/json' body: '{"id": "{{ createdTodo.body.json.id }}", "title": "iusto"}' assign: updatedTodo - name: delete todo request: url: /delete?id={{ updatedTodo.body.json.id }} method: DELETE
$ drill --benchmark benchmark.yml --stats Concurrency 3 Iterations 3 Rampup 3 Base URL https://httpbin.org/ basic auth https://httpbin.org//basic-auth/k-jun/password 200 OK 1026ms basic auth https://httpbin.org//basic-auth/k-jun/password 200 OK 214ms post todo https://httpbin.org//post 200 OK 377ms post todo https://httpbin.org//post 200 OK 375ms get todo https://httpbin.org//get?id=2aa068b7-890d-341c-970f-e75ed5e152d1 200 OK 377ms get todo https://httpbin.org//get?id=2aa068b7-890d-341c-970f-e75ed5e152d1 200 OK 346ms put todo https://httpbin.org//put 200 OK 192ms put todo https://httpbin.org//put 200 OK 179ms delete todo https://httpbin.org//delete?id=2aa068b7-890d-341c-970f-e75ed5e152d1 200 OK 189ms basic auth https://httpbin.org//basic-auth/k-jun/password 200 OK 182ms delete todo https://httpbin.org//delete?id=2aa068b7-890d-341c-970f-e75ed5e152d1 200 OK 177ms post todo https://httpbin.org//post 200 OK 183ms get todo https://httpbin.org//get?id=2aa068b7-890d-341c-970f-e75ed5e152d1 200 OK 183ms put todo https://httpbin.org//put 200 OK 183ms delete todo https://httpbin.org//delete?id=2aa068b7-890d-341c-970f-e75ed5e152d1 200 OK 182ms basic auth Total requests 3 basic auth Successful requests 3 basic auth Failed requests 0 basic auth Median time per request 649ms basic auth Average time per request 492ms basic auth Sample standard deviation 402ms post todo Total requests 3 post todo Successful requests 3 post todo Failed requests 0 post todo Median time per request 368ms post todo Average time per request 304ms post todo Sample standard deviation 89ms get todo Total requests 3 get todo Successful requests 3 get todo Failed requests 0 get todo Median time per request 365ms get todo Average time per request 303ms get todo Sample standard deviation 88ms put todo Total requests 3 put todo Successful requests 3 put todo Failed requests 0 put todo Median time per request 312ms put todo Average time per request 268ms put todo Sample standard deviation 122ms delete todo Total requests 3 delete todo Successful requests 3 delete todo Failed requests 0 delete todo Median time per request 185ms delete todo Average time per request 182ms delete todo Sample standard deviation 4ms Time taken for tests 2.9 seconds Total requests 15 Successful requests 15 Failed requests 0 Requests per second 5.18 [#/sec] Median time per request 213ms Average time per request 310ms Sample standard deviation 221ms
認証情報も受け渡せるし良い感じ。繰り返して実行する際に、変数展開みたいにある程度値のばらつきをもたせる仕組みは考えないと行けない気がするがそれでもかなり柔軟。 DELETE は body がつけられないなぁ.. と思っていたらどうもつけられないのが正しいらしい...。
しかし便利だ。頑張って Vegeta とか使っていたのがアホらしい。
coredns
CoreDNS is a Cloud Native Computing Foundation graduated project.
とのことなのでかなり期待できる dns。
https://github.com/coredns/coredns
UDP/TCP/https2/gRPC と一通り対応していそう。バックエンドには etcd が使用されているらしい。
brew install coredns
以下のように設定してあげると、静的な host 名の解決ができることを確認。
$ cat Corefile k-jun.com { cache errors log reload hosts { 10.0.0.1 k-jun.com fallthrough } forward . 8.8.8.8:53 } . { cache forward . 8.8.8.8:53 } ~/source-code master* ⇣ $ coredns -dns.port=1053 --conf ./Corefile .:1053 k-jun.com.:1053 [INFO] plugin/reload: Running configuration MD5 = 8dd98d1755651542d41665b2292a4365 CoreDNS-1.8.4 darwin/amd64, go1.16.4, [INFO] [::1]:59783 - 42716 "A IN k-jun.com. udp 38 false 4096" NOERROR qr,aa,rd 52 0.000108431s
$ dig @localhost k-jun.com -p 1053 +short 10.0.0.1
どうやら etcd という KVS と連携すると動的な 名前解決ができるようになるようなのでこれも試してみる。 まずは etcd を用意。
$ etcd
{"level":"info","ts":"2021-08-09T17:03:04.210+0900","caller":"etcdmain/etcd.go:72","msg":"Running: ","args":["etcd"]}
{"level":"info","ts":"2021-08-09T17:03:04.210+0900","caller":"etcdmain/etcd.go:99","msg":"failed to detect default host","error":"default host not supported on darwin_amd64"}
{"level":"warn","ts":"2021-08-09T17:03:04.210+0900","caller":"etcdmain/etcd.go:104","msg":"'data-dir' was empty; using default","data-dir":"default.etcd"}
...
$ etcdctl put /com/k-jun/1 '{"host": "10.0.0.1", "ttl": 60}'
OK
$ etcdctl put /com/k-jun/2 '{"host": "10.0.0.2", "ttl": 60}'
OK
$ etcdctl put /com/k-jun/3 '{"host": "10.0.0.3", "ttl": 60}'
OK
設定を入れて、名前解決してみると。
k-jun.com {
cache 60
errors
log
reload
etcd {
path /
endpoint http://127.0.0.1:2379
fallthrough
}
forward . 8.8.8.8:53
}
. {
cache
forward . 8.8.8.8:53
}
いい感じにできる。
$ dig @localhost k-jun.com -p 1053 +short 10.0.0.1 10.0.0.2 10.0.0.3
A レコードだけでなく SRV レコードもいけるらしいのでやってみる。
$ etcdctl put /com/k-jun/srv/1 '{"host": "one.k-jun", "ttl": 60, "priority": 10, "port": 8080}' OK $ etcdctl put /com/k-jun/srv/2 '{"host": "two.k-jun", "ttl": 60, "priority": 20, "port": 8080}' OK $ etcdctl put /com/k-jun/srv/3 '{"host": "three.k-jun", "ttl": 60, "priority": 30, "port": 8080}' OK $ dig @localhost srv.k-jun.com SRV -p 1053 +short 10 100 8080 one.k-jun. 20 100 8080 two.k-jun. 30 100 8080 three.k-jun.
おおお!! これは面白い! 内部的な DNS サーバーを構築する必要があるときにめちゃくちゃ便利そう。
