sarjarapu
sarjarapu
/ elections-environment.sh
Created
June 15, 2018 05:53
A bash script with download MongoDB v3.6.5 and start mongod on port 27000
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| # Run these commands on all the 3 servers of yours. | |
| # download v3.6 | |
| curl -O https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-3.6.5.tgz | |
| BIN_NAME="mongodb-linux-x86_64-rhel70-3.6.5" | |
| BIN_VERSION="v3.6.5" | |
| # create data directory and untar the binaries | |
| tar -xvzf "$BIN_NAME.tgz" | |
| rm "$BIN_NAME.tgz" | |
| mv $BIN_NAME $BIN_VERSION | |
| rm -rf data |
sarjarapu
/ elections-initiate.sh
Created
June 15, 2018 05:56
A bash script to initiate a replica set with 3 hosts we created earlier
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| $BIN_VERSION/bin/mongo --port 27000 <<EOF | |
| rs.initiate({ | |
| _id: 'rs0', | |
| members: [ | |
| { _id: 0, host : 'mon01:27000' }, | |
| { _id: 1, host : 'mon02:27000' }, | |
| { _id: 2, host : 'mon03:27000' } | |
| ] }) | |
| EOF | |
| # MongoDB shell version v3.6.5 |
sarjarapu
/ elections-rs.config.js
Last active
June 15, 2018 06:03
A JavaScript function call showing the replica set configuration settings
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| rs.config() | |
| /* | |
| { | |
| "_id": "rs0", | |
| "version": 1, | |
| "protocolVersion": NumberLong(1), | |
| "members": [{ | |
| "_id": 0, | |
| "host": "mon01:27000", | |
| "arbiterOnly": false, |
sarjarapu
/ elections-rs.status.js
Last active
June 15, 2018 06:02
A JavaScript function call showing the replica set status information
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| rs.status() | |
| /* | |
| { | |
| "set": "rs0", | |
| "date": ISODate("2018-06-15T00:57:24.708Z"), | |
| "myState": 1, | |
| "term": NumberLong(1), | |
| "heartbeatIntervalMillis": NumberLong(2000), | |
| "optimes": { | |
| "lastCommittedOpTime": { |
sarjarapu
/ elections-printSlaveReplicationInfo.js
Last active
June 15, 2018 06:02
A JavaScript function calls showing the database printSlaveReplicationInfo command output
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| db.printSlaveReplicationInfo() | |
| /* | |
| source: mon02:27000 | |
| syncedTo: Fri Jun 15 2018 01:29:11 GMT+0000 (UTC) | |
| 0 secs (0 hrs) behind the primary | |
| source: mon03:27000 | |
| syncedTo: Fri Jun 15 2018 01:29:11 GMT+0000 (UTC) | |
| 0 secs (0 hrs) behind the primary | |
| */ |
sarjarapu
/ elections-freeze.js
Created
June 15, 2018 06:05
A JavaScript method invoking rs.freeze to make the replica set member ineligible to become primary
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| // Freeze mon03 | |
| rs.isMaster().me | |
| // mon03:27000 | |
| rs.freeze(60) | |
| /* | |
| { | |
| "ok" : 1, | |
| "operationTime" : Timestamp(1529033711, 1), | |
| "$clusterTime" : { |
sarjarapu
/ elections-electionTimeoutMillis.js
Created
June 15, 2018 06:10
A JavaScript code to set the electionTimeoutMillis to 2 seconds and stepDown the primary
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| // # rs0:PRIMARY> | |
| rs.isMaster().me | |
| // mon01:27000 | |
| var conf = rs.conf() | |
| conf.settings.electionTimeoutMillis=2000 | |
| rs.reconfig(conf) | |
| /* | |
| { | |
| "ok": 1, |
sarjarapu
/ elections-mongod.sh
Created
June 15, 2018 06:13
A bash script to show the transition of mon02 from Secondary to Primary
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| # Server mon02 | |
| tail -100 data/mongod.log | grep REPL | |
| # 2018-06-15T03:52:42.304+0000 I REPL [rsBackgroundSync] could not find member to sync from | |
| # 2018-06-15T03:52:42.305+0000 I REPL [replexec-28] Member mon01:27000 is now in state SECONDARY | |
| # 2018-06-15T03:52:43.306+0000 I REPL [SyncSourceFeedback] SyncSourceFeedback error sending update to mon01:27000: InvalidSyncSource: Sync source was cleared. Was mon01:27000 | |
| # 2018-06-15T03:52:43.360+0000 I REPL [replexec-26] Starting an election, since weve seen no PRIMARY in the past 2000ms | |
| # 2018-06-15T03:52:43.360+0000 I REPL [replexec-26] conducting a dry run election to see if we could be elected. current term: 4 | |
| # 2018-06-15T03:52:43.360+0000 I REPL [replexec-24] VoteRequester(term 4 dry run) received a yes vote from mon01:27000; response message: { term: 4, voteGranted: true, reason: "", ok: 1.0, operationTime: Timestamp(1529034758, 1), $clusterTime: { clusterTime: Timestamp(1529034758, 1), signature: { hash: BinData(0, 0000000000000000000 |
sarjarapu
/ elections-reset.electionTimeoutMillis.js
Created
June 15, 2018 06:15
A JavaScript code to reset the electionTimeoutMillis back to its default value
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| rs.isMaster().me | |
| // mon02:27000 | |
| // rs0:PRIMARY> | |
| // on the new primary | |
| var conf = rs.conf() | |
| conf.settings.electionTimeoutMillis=10000 | |
| /* | |
| rs.reconfig(conf) | |
| { | |
| "ok": 1, |
sarjarapu
/ kubernetes-helper.scripts.sh
Created
July 11, 2018 20:23
Helper scripts to deploy the MongoDB in Kubernetes
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| # Download the helper scripts from GitHub repo | |
| wget -O k8-mongo.zip https://github.com/sarjarapu/k8-mongo/archive/master.zip | |
| unzip k8-mongo.zip | |
| cd k8-mongo-master |