working till migration
This commit is contained in:
parent
3c6e99b812
commit
0ecb2d9cb8
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@ -4,3 +4,5 @@
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__pycache__/
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venv/
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log.txt
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etcd3_wrapper
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ucloud_common
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@ -1,3 +0,0 @@
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[submodule "etcd3_wrapper"]
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path = etcd3_wrapper
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url = https://code.ungleich.ch/ahmedbilal/etcd3_wrapper
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2
Pipfile
2
Pipfile
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@ -9,10 +9,10 @@ flake8 = "*"
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black = "==19.3b0"
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[packages]
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etcd3 = "*"
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python-decouple = "*"
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pytest = "*"
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coverage = "*"
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python-etcd3 = {editable = true,git = "https://github.com/kragniz/python-etcd3"}
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[requires]
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python_version = "3.7"
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@ -1,7 +1,7 @@
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{
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"_meta": {
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"hash": {
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"sha256": "8a70e21524bd2bfc041ea7520f90d4a0e981a6c888623f62b76c9df05e9028e1"
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"sha256": "f0d725d20f218d8ac861af45435d0473721c4a511bb9dfbdce8b68b2653fccaa"
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},
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"pipfile-spec": 6,
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"requires": {
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@ -67,13 +67,6 @@
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"index": "pypi",
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"version": "==4.5.3"
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},
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"etcd3": {
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"hashes": [
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"sha256:25a524b9f032c6631ff0097532907dea81243eaa63c3744510fd1598cc4e0e87"
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],
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"index": "pypi",
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"version": "==0.10.0"
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},
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"grpcio": {
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"hashes": [
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"sha256:03b78b4e7dcdfe3e257bb528cc93923f9cbbab6d5babf15a60d21e9a4a70b1a2",
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@ -120,10 +113,10 @@
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},
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"more-itertools": {
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"hashes": [
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"sha256:3ad685ff8512bf6dc5a8b82ebf73543999b657eded8c11803d9ba6b648986f4d",
|
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"sha256:8bb43d1f51ecef60d81854af61a3a880555a14643691cc4b64a6ee269c78f09a"
|
||||
"sha256:409cd48d4db7052af495b09dec721011634af3753ae1ef92d2b32f73a745f832",
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"sha256:92b8c4b06dac4f0611c0729b2f2ede52b2e1bac1ab48f089c7ddc12e26bb60c4"
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],
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"version": "==7.1.0"
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"version": "==7.2.0"
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},
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"packaging": {
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"hashes": [
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@ -171,10 +164,10 @@
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},
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"pyparsing": {
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"hashes": [
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"sha256:1873c03321fc118f4e9746baf201ff990ceb915f433f23b395f5580d1840cb2a",
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"sha256:9b6323ef4ab914af344ba97510e966d64ba91055d6b9afa6b30799340e89cc03"
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"sha256:43c5486cefefa536c9aab528881c992328f020eefe4f6d06332449c365218580",
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"sha256:d6c5ffe9d0305b9b977f7a642d36b9370954d1da7ada4c62393382cbadad4265"
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],
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"version": "==2.4.0"
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"version": "==2.4.1.1"
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},
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"pytest": {
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"hashes": [
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@ -191,6 +184,11 @@
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"index": "pypi",
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"version": "==3.1"
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},
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"python-etcd3": {
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"editable": true,
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"git": "https://github.com/kragniz/python-etcd3",
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"ref": "cdc4c48bde88a795230a02aa574df84ed9ccfa52"
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},
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"six": {
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"hashes": [
|
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"sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
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@ -258,6 +256,13 @@
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],
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"version": "==7.0"
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},
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"ddt": {
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"hashes": [
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"sha256:474546b4020ce8a2f9550ba8899c28aa2c284c7bbf175bddede98be949d1ca7c",
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"sha256:d13e6af8f36238e89d00f4ebccf2bda4f6d1878be560a6600689e42077e164e3"
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],
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"version": "==1.2.1"
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},
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"entrypoints": {
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"hashes": [
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"sha256:589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19",
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@ -273,6 +278,12 @@
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"index": "pypi",
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"version": "==3.7.8"
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},
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"gitdb": {
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"hashes": [
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"sha256:a3ebbc27be035a2e874ed904df516e35f4a29a778a764385de09de9e0f139658"
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],
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"version": "==0.6.4"
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},
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"gitdb2": {
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"hashes": [
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"sha256:83361131a1836661a155172932a13c08bda2db3674e4caa32368aa6eb02f38c2",
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@ -282,10 +293,10 @@
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},
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"gitpython": {
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"hashes": [
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"sha256:563221e5a44369c6b79172f455584c9ebbb122a13368cc82cb4b5addff788f82",
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||||
"sha256:8237dc5bfd6f1366abeee5624111b9d6879393d84745a507de0fda86043b65a8"
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"sha256:7428f1cc5e72d53e65c3259d5cebc22fb2b07f973c49d95b3c3d26c64890a3c3",
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||||
"sha256:a0f744a4941eac5d99033eb0adcbec83bf443ee173fda4292d92a906aedce952"
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],
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"version": "==2.1.11"
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"version": "==2.1.12"
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},
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"mccabe": {
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"hashes": [
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@ -296,10 +307,10 @@
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},
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"pbr": {
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"hashes": [
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||||
"sha256:36ebd78196e8c9588c972f5571230a059ff83783fabbbbedecc07be263ccd7e6",
|
||||
"sha256:5a03f59455ad54f01a94c15829b8b70065462b7bd8d5d7e983306b59127fc841"
|
||||
"sha256:0ca44dc9fd3b04a22297c2a91082d8df2894862e8f4c86a49dac69eae9e85ca0",
|
||||
"sha256:4aed6c1b1fa5020def0f22aed663d87b81bb3235f112490b07d2643d7a98c5b5"
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],
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"version": "==5.4.0"
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"version": "==5.4.1"
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},
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"pycodestyle": {
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"hashes": [
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|
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@ -338,6 +349,12 @@
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],
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"version": "==1.12.0"
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},
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"smmap": {
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"hashes": [
|
||||
"sha256:0e2b62b497bd5f0afebc002eda4d90df9d209c30ef257e8673c90a6b5c119d62"
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||||
],
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||||
"version": "==0.9.0"
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||||
},
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||||
"smmap2": {
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||||
"hashes": [
|
||||
"sha256:0555a7bf4df71d1ef4218e4807bbf9b201f910174e6e08af2e138d4e517b4dde",
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@ -1 +0,0 @@
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Subproject commit 9abc74e387bf94832a0ad95644d667abb87e5529
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196
main.py
196
main.py
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@ -11,9 +11,11 @@ import logging
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from decouple import config
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from collections import Counter
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from functools import reduce
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from etcd3_wrapper import Etcd3Wrapper, EtcdEntry, PseudoEtcdMeta
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from datetime import datetime
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from ucloud_common.enums import VMStatus, RUNNING_VM_STATUSES
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from etcd3_wrapper import Etcd3Wrapper
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from ucloud_common.enums import HostStatus
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from ucloud_common.vm import VmPool, VMEntry
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from ucloud_common.host import HostPool
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logging.basicConfig(
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level=logging.DEBUG,
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@ -23,27 +25,8 @@ logging.basicConfig(
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datefmt="%d-%b-%y %H:%M:%S",
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)
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class VmPool(object):
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def __init__(self, etcd_client, vm_prefix):
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self.client = etcd_client
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self.vms = []
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_vms = self.client.get_prefix(vm_prefix)
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self.vms = [(vm.key, json.loads(vm.value)) for vm in _vms]
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@staticmethod
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def by_host(vms, host):
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print(vms)
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return list(filter(lambda x: x[1]["hostname"] == host, vms))
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@staticmethod
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def by_status(vms, status):
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return list(filter(lambda x: x[1]["status"] == status, vms))
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@staticmethod
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def except_status(vms, status):
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return list(filter(lambda x: x[1]["status"] != status, vms))
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VM_POOL = None
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HOST_POOL = None
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def accumulated_specs(vms_specs):
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@ -61,149 +44,124 @@ def remaining_resources(host_specs, vms_specs):
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return remaining
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def get_suitable_host(etcd_client, vm_prefix, host_prefix, vm_specs):
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vm_pool = VmPool(etcd_client, vm_prefix)
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hosts = etcd_client.get_prefix(host_prefix, value_in_json=True)
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hosts = filter(lambda h: h.value["status"] == "ALIVE", hosts)
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def get_suitable_host(vm_specs):
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hosts = HOST_POOL.by_status("ALIVE")
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for host in hosts:
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_host_name, host_value = (host.key, host.value)
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# Get All Virtual Machines
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vms = vm_pool.vms
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# Filter them by host_name
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vms = VmPool.by_host(vms, _host_name)
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vms = VM_POOL.by_host(host.key)
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# Filter them by status
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vms = VmPool.except_status(vms, "REQUESTED_NEW")
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vms = VM_POOL.except_status("REQUESTED_NEW", vms=vms)
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running_vms_specs = [vm[1]["specs"] for vm in vms]
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running_vms_specs = [vm.specs for vm in vms]
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# Accumulate all of their combined specs
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running_vms_accumulated_specs = accumulated_specs(running_vms_specs)
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# print(running_vms_accumulated_specs)
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running_vms_accumulated_specs = accumulated_specs(
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running_vms_specs
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)
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# Find out remaining resources after
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# host_specs - already running vm_specs
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# print(host_value)
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remaining = remaining_resources(
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host_value["specs"], running_vms_accumulated_specs
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host.specs, running_vms_accumulated_specs
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)
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# print(remaining)
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# Find out remaining - new_vm_specs
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remaining = remaining_resources(remaining, vm_specs)
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# if remaining resources >= 0 return this host_name
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if all(
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map(lambda x: True if remaining[x] >= 0 else False, remaining)
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map(
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lambda x: True if remaining[x] >= 0 else False,
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remaining,
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)
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):
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return _host_name
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return host.key
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return None
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def dead_host_detection(hosts):
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def dead_host_detection():
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# Bring out your dead! - Monty Python and the Holy Grail
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hosts = HOST_POOL.by_status(HostStatus.alive)
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dead_hosts_keys = []
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for host in hosts:
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# Bring out your dead! - Monty Python and the Holy Grail
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if "status" in host.value and "last_heartbeat" in host.value:
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# Don't count that is already buried
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if host.value["status"] == "DEAD":
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continue
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last_heartbeat = datetime.fromisoformat(
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host.value["last_heartbeat"]
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)
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delta = datetime.utcnow() - last_heartbeat
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if delta.total_seconds() > 60:
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# Only check those who claims to be alive
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if host.status == HostStatus.alive:
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if not host.is_alive():
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dead_hosts_keys.append(host.key)
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else:
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dead_hosts_keys.append(host.key)
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return dead_hosts_keys
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def dead_host_mitigation(client: Etcd3Wrapper, dead_hosts_keys):
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def dead_host_mitigation(dead_hosts_keys):
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for host_key in dead_hosts_keys:
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host = client.get(host_key, value_in_json=True)
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host.value["status"] = "DEAD"
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host.value["last_heartbeat"] = datetime.utcnow().isoformat()
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host = HOST_POOL.get(host_key)
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host.declare_dead()
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# Find all vms that were hosted on this dead host
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all_vms = client.get_prefix(config("VM_PREFIX"), value_in_json=True)
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vms_hosted_on_dead_host = filter(
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lambda _vm: _vm.value["hostname"] == host_key, all_vms
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)
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vms_hosted_on_dead_host = VM_POOL.by_host(host_key)
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for vm in vms_hosted_on_dead_host:
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vm.value["hostname"] = ""
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if vm.value["status"] in RUNNING_VM_STATUSES:
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vm.value["status"] = VMStatus.requested_start
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client.put(vm.key, vm.value, value_in_json=True)
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client.put(host.key, host.value, value_in_json=True)
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vm.declare_killed()
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VM_POOL.put(vm)
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HOST_POOL.put(host)
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def assign_host(client, vm_prefix, host_prefix, e):
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host_name = get_suitable_host(
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client, vm_prefix, host_prefix, e.value["specs"]
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)
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def assign_host(vm):
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host_name = get_suitable_host(vm.specs)
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if host_name:
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if e.value["status"] == "REQUESTED_NEW":
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e.value["status"] = "SCHEDULED_DEPLOY"
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else:
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e.value["status"] = "REQUESTED_START"
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||||
e.value["hostname"] = host_name
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client.put(e.key, json.dumps(e.value))
|
||||
if vm.status == "REQUESTED_NEW":
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vm.status = "SCHEDULED_DEPLOY"
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||||
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||||
if vm.status == "KILLED":
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vm.status = "REQUESTED_START"
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vm.hostname = host_name
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||||
VM_POOL.put(vm)
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return host_name
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return None
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||||
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||||
def main(vm_prefix, host_prefix):
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logging.info(f"{'*' * 5} SESSION STARTED {'*' * 5}")
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client = Etcd3Wrapper(
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host=config("ETCD_HOST"), port=int(config("ETCD_PORT"))
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||||
)
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RESCAN_VMS = False
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global VM_POOL, HOST_POOL
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VM_POOL = VmPool(client, vm_prefix)
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||||
HOST_POOL = HostPool(client, host_prefix)
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||||
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||||
PENDING_VMS = []
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||||
for events_iterator in [
|
||||
client.get_prefix(vm_prefix),
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||||
client.watch_prefix(vm_prefix, timeout=10),
|
||||
client.get_prefix(vm_prefix, value_in_json=True),
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||||
client.watch_prefix(vm_prefix, timeout=10, value_in_json=True),
|
||||
]:
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||||
for e in events_iterator:
|
||||
try:
|
||||
e.value = json.loads(e.value)
|
||||
except json.JSONDecodeError:
|
||||
logging.error(f"Invalid JSON {e.value}")
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||||
continue
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||||
e = VMEntry(e)
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||||
logging.debug(f"{e.key}, {e.value}")
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||||
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logging.debug(e.key, e.value)
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# Never Run time critical mechanism inside timeout
|
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# mechanism because timeout mechanism only comes
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# when no other event is happening. It means under
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||||
# heavy load there would not be a timeout
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||||
if e.status == "TIMEOUT":
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dead_hosts = dead_host_detection()
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logging.debug(f"Dead hosts: {dead_hosts}")
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dead_host_mitigation(dead_hosts)
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e_status = e.value["status"]
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vm_scheduled = []
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for vm in PENDING_VMS:
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if assign_host(vm) is not None:
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vm_scheduled.append(vm)
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||||
|
||||
if e_status == "TIMEOUT":
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||||
logging.info("Timeout")
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||||
hosts = client.get_prefix(host_prefix, value_in_json=True)
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||||
dead_hosts = dead_host_detection(hosts)
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||||
dead_host_mitigation(client, dead_hosts)
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||||
|
||||
if RESCAN_VMS:
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||||
RESCAN_VMS = False # Assume we won't need it after this
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||||
vms = client.get_prefix(vm_prefix)
|
||||
|
||||
for vm in vms:
|
||||
fake_e = EtcdEntry(
|
||||
PseudoEtcdMeta(key=vm.key.encode("utf-8")),
|
||||
value=vm.value.encode("utf-8"), value_in_json=True
|
||||
)
|
||||
if (assign_host(client, vm_prefix, host_prefix,
|
||||
fake_e) is None):
|
||||
# We need it because we still have vm left
|
||||
# to schedule
|
||||
RESCAN_VMS = True
|
||||
|
||||
elif e_status in ["REQUESTED_NEW", "REQUESTED_START"]:
|
||||
if assign_host(client, vm_prefix, host_prefix, e) is None:
|
||||
print("No Resource Left. Emailing admin....")
|
||||
RESCAN_VMS = True
|
||||
for vm in vm_scheduled:
|
||||
PENDING_VMS.remove(vm)
|
||||
logging.debug(f"Remaining Pending: {PENDING_VMS}")
|
||||
elif e.status in ["REQUESTED_NEW", "KILLED"]:
|
||||
if assign_host(e) is None:
|
||||
PENDING_VMS.append(e)
|
||||
logging.info("No Resource Left. Emailing admin....")
|
||||
logging.debug(f"Pending VMS: {PENDING_VMS}")
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
|
|
|
|||
|
|
@ -1,34 +0,0 @@
|
|||
from enum import Enum
|
||||
|
||||
class VMStatus(Enum):
|
||||
# Must be only assigned to brand new VM
|
||||
requested_new = "REQUESTED_NEW"
|
||||
|
||||
# Only Assigned to already created vm
|
||||
requested_start = "REQUESTED_START"
|
||||
|
||||
# These all are for running vms
|
||||
requested_shutdown = "REQUESTED_SHUTDOWN"
|
||||
requested_suspend = "REQUESTED_SUSPEND"
|
||||
requested_resume = "REQUESTED_RESUME"
|
||||
requested_migrate = "REQUESTED_MIGRATE"
|
||||
|
||||
# either its image is not found or user requested
|
||||
# to delete it
|
||||
deleted = "DELETED"
|
||||
|
||||
stopped = "STOPPED" # After requested_shutdown
|
||||
killed = "KILLED" # either host died or vm died itself
|
||||
|
||||
running = "RUNNING"
|
||||
suspended = "SUSPENDED"
|
||||
|
||||
|
||||
class HostStatus(Enum):
|
||||
alive = "ALIVE"
|
||||
dead = "DEAD"
|
||||
|
||||
|
||||
RUNNING_VM_STATUSES = [VMStatus.requested_shutdown, VMStatus.requested_suspend,
|
||||
VMStatus.requested_resume, VMStatus.requested_migrate,
|
||||
VMStatus.running, VMStatus.suspended]
|
||||
Loading…
Reference in New Issue