//
// SPDX-License-Identifier: AGPL-3.0
-package main
+package keepbalance
import (
"crypto/md5"
KeepMount: arvados.KeepMount{
UUID: fmt.Sprintf("zzzzz-mount-%015x", i),
StorageClasses: map[string]bool{"default": true},
+ AllowWrite: true,
+ AllowTrash: true,
},
KeepService: srv,
}}
srv.mounts[0].KeepMount.DeviceID = fmt.Sprintf("writable-by-srv-%x", i)
srv.mounts = append(srv.mounts, &KeepMount{
KeepMount: arvados.KeepMount{
- DeviceID: fmt.Sprintf("writable-by-srv-%x", (i+1)%len(bal.srvs)),
- UUID: fmt.Sprintf("zzzzz-mount-%015x", i<<16),
- ReadOnly: readonly,
+ DeviceID: bal.srvs[(i+1)%len(bal.srvs)].mounts[0].KeepMount.DeviceID,
+ UUID: bal.srvs[(i+1)%len(bal.srvs)].mounts[0].KeepMount.UUID,
+ AllowWrite: !readonly,
+ AllowTrash: !readonly,
Replication: 1,
StorageClasses: map[string]bool{"default": true},
},
desired: map[string]int{"default": 2},
current: slots{0, 1, 2},
timestamps: []int64{12345678, 10000000, 10000000}})
+ bal.try(c, tester{
+ desired: map[string]int{"default": 0},
+ current: slots{0, 1, 2},
+ timestamps: []int64{12345678, 12345678, 12345678},
+ shouldTrash: slots{0},
+ shouldTrashMounts: []string{
+ bal.srvs[bal.knownRendezvous[0][0]].mounts[0].UUID}})
+ bal.try(c, tester{
+ desired: map[string]int{"default": 2},
+ current: slots{0, 1, 2, 5, 6},
+ timestamps: []int64{12345678, 12345679, 10000000, 10000000, 10000000},
+ shouldTrash: slots{2},
+ shouldTrashMounts: []string{
+ bal.srvs[bal.knownRendezvous[0][2]].mounts[0].UUID}})
+ bal.try(c, tester{
+ desired: map[string]int{"default": 2},
+ current: slots{0, 1, 2, 5, 6},
+ timestamps: []int64{12345678, 12345679, 12345671, 10000000, 10000000},
+ shouldTrash: slots{2, 5},
+ shouldTrashMounts: []string{
+ bal.srvs[bal.knownRendezvous[0][2]].mounts[0].UUID,
+ bal.srvs[bal.knownRendezvous[0][5]].mounts[0].UUID}})
+ bal.try(c, tester{
+ desired: map[string]int{"default": 2},
+ current: slots{0, 1, 2, 5, 6},
+ timestamps: []int64{12345678, 12345679, 12345679, 10000000, 10000000},
+ shouldTrash: slots{5},
+ shouldTrashMounts: []string{
+ bal.srvs[bal.knownRendezvous[0][5]].mounts[0].UUID}})
}
func (bal *balancerSuite) TestDecreaseReplBlockTooNew(c *check.C) {
}
func (bal *balancerSuite) TestCleanupMounts(c *check.C) {
- bal.srvs[3].mounts[0].KeepMount.ReadOnly = true
+ bal.srvs[3].mounts[0].KeepMount.AllowWrite = false
bal.srvs[3].mounts[0].KeepMount.DeviceID = "abcdef"
+ bal.srvs[14].mounts[0].KeepMount.UUID = bal.srvs[3].mounts[0].KeepMount.UUID
bal.srvs[14].mounts[0].KeepMount.DeviceID = "abcdef"
c.Check(len(bal.srvs[3].mounts), check.Equals, 1)
bal.cleanupMounts()
}
func (bal *balancerSuite) TestDeviceRWMountedByMultipleServers(c *check.C) {
- bal.srvs[0].mounts[0].KeepMount.DeviceID = "abcdef"
- bal.srvs[9].mounts[0].KeepMount.DeviceID = "abcdef"
- bal.srvs[14].mounts[0].KeepMount.DeviceID = "abcdef"
+ dupUUID := bal.srvs[0].mounts[0].KeepMount.UUID
+ bal.srvs[9].mounts[0].KeepMount.UUID = dupUUID
+ bal.srvs[14].mounts[0].KeepMount.UUID = dupUUID
// block 0 belongs on servers 3 and e, which have different
- // device IDs.
+ // UUIDs.
bal.try(c, tester{
known: 0,
desired: map[string]int{"default": 2},
current: slots{1},
shouldPull: slots{0}})
// block 1 belongs on servers 0 and 9, which both report
- // having a replica, but the replicas are on the same device
- // ID -- so we should pull to the third position (7).
+ // having a replica, but the replicas are on the same volume
+ // -- so we should pull to the third position (7).
bal.try(c, tester{
known: 1,
desired: map[string]int{"default": 2},
current: slots{0, 1},
shouldPull: slots{2}})
- // block 1 can be pulled to the doubly-mounted device, but the
+ // block 1 can be pulled to the doubly-mounted volume, but the
// pull should only be done on the first of the two servers.
bal.try(c, tester{
known: 1,
desired: map[string]int{"default": 2},
current: slots{2},
shouldPull: slots{0}})
- // block 0 has one replica on a single device mounted on two
+ // block 0 has one replica on a single volume mounted on two
// servers (e,9 at positions 1,9). Trashing the replica on 9
// would lose the block.
bal.try(c, tester{
pulling: 1,
}})
// block 0 is overreplicated, but the second and third
- // replicas are the same replica according to DeviceID
+ // replicas are the same replica according to volume UUID
// (despite different Mtimes). Don't trash the third replica.
bal.try(c, tester{
known: 0,
// classes=[special,special2].
bal.srvs[9].mounts = []*KeepMount{{
KeepMount: arvados.KeepMount{
+ AllowWrite: true,
+ AllowTrash: true,
Replication: 1,
StorageClasses: map[string]bool{"special": true},
UUID: "zzzzz-mount-special00000009",
KeepService: bal.srvs[9],
}, {
KeepMount: arvados.KeepMount{
+ AllowWrite: true,
+ AllowTrash: true,
Replication: 1,
StorageClasses: map[string]bool{"special": true, "special2": true},
UUID: "zzzzz-mount-special20000009",
// classes=[special3], one with classes=[default].
bal.srvs[13].mounts = []*KeepMount{{
KeepMount: arvados.KeepMount{
+ AllowWrite: true,
+ AllowTrash: true,
Replication: 1,
StorageClasses: map[string]bool{"special2": true},
UUID: "zzzzz-mount-special2000000d",
KeepService: bal.srvs[13],
}, {
KeepMount: arvados.KeepMount{
+ AllowWrite: true,
+ AllowTrash: true,
Replication: 1,
StorageClasses: map[string]bool{"default": true},
UUID: "zzzzz-mount-00000000000000d",
desired: map[string]int{"default": 2, "special": 1},
current: slots{0, 1},
shouldPull: slots{9},
- shouldPullMounts: []string{"zzzzz-mount-special00000009"}})
+ shouldPullMounts: []string{"zzzzz-mount-special20000009"}})
// If some storage classes are not satisfied, don't trash any
// excess replicas. (E.g., if someone desires repl=1 on
// class=durable, and we have two copies on class=volatile, we
desired: map[string]int{"special": 1},
current: slots{0, 1},
shouldPull: slots{9},
- shouldPullMounts: []string{"zzzzz-mount-special00000009"}})
+ shouldPullMounts: []string{"zzzzz-mount-special20000009"}})
// Once storage classes are satisfied, trash excess replicas
// that appear earlier in probe order but aren't needed to
// satisfy the desired classes.
projects / arvados.git / blobdiff