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Also includes Ansible script changes for the new Mongo 3.6 PPA. Note that the Bash script has been tested, but the Ansible script has not; the intent here is to run the Bash script, not the Ansible script, on the dev, QA and live servers for this upgrade.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| #!/bin/bash | ||
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| echo "" | ||
| echo "Upgrade process:" | ||
| echo "- Ensure Mongo PPA is available" | ||
| echo "- Do a mongodump to a location with enough room" | ||
| echo "- Download Mongo 3.6 packages but do not install (yet)" | ||
| echo "- Shut down Mongo server" | ||
| echo "- Install new Mongo 3.6 packages" | ||
| echo "- Do a mongorestore" | ||
| echo "" | ||
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| # Sanity checks | ||
| which systemctl >/dev/null | ||
| if [ $? -ne 0 ]; then | ||
| echo "Looks like systemd isn't installed on this computer; this script will fail." | ||
| echo "You might still be able to do the upgrade by hand." | ||
| exit 2 | ||
| fi | ||
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| spaceavail=$(df -k /var/lib --output=avail | sed 1d) | ||
| echo "Looks like you have $spaceavail KiB available for MongoDB data" | ||
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| yesno() { | ||
| # NOTE: Defaults to NO | ||
| read -p "$1 [y/N] " ynresult | ||
| case "$ynresult" in | ||
| [yY]*) true ;; | ||
| *) false ;; | ||
| esac | ||
| } | ||
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| if [ $spaceavail -lt 1048576 ]; then | ||
| echo "You have less than 1 GiB available in /var/lib; please free up some room (maybe run 'sudo apt clean') and try again." | ||
| echo "Or if you REALLY want to proceed, then comment this section out of the script (could be dangerous!) and re-run it." | ||
| exit 2 | ||
| fi | ||
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| if [ $spaceavail -lt 4194304 ]; then | ||
| echo "You have less than 4 GiB available in /var/lib; please free up some room (maybe run 'sudo apt clean') and try again." | ||
| echo "The script will *probably* succeed, but if you run out of room during the mongorestore process, your Mongo database" | ||
| echo "might fail to come up in a working state. If you're at all unsure, then stop here and free up some room first." | ||
| if yesno "Proceed despite low disk space?"; then | ||
| echo "Okay, proceeding despite low disk space..." | ||
| else | ||
| exit 1 | ||
| fi | ||
| fi | ||
|
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| spaceavail=$(df -k ${HOME} --output=avail | sed 1d) | ||
| echo "Looks like you have $spaceavail KiB available in your home directory (where the mongodump backup will be stored)" | ||
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| if [ $spaceavail -lt 1048576 ]; then | ||
| echo "You have less than 1 GiB available in your home directory; the mongodump command is likely to fail." | ||
| echo "Please free up some room in ${HOME} and try again." | ||
| echo "Or if you REALLY want to proceed, then comment this section out of the script and re-run it." | ||
| exit 2 | ||
| fi | ||
|
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||
| if [ $spaceavail -lt 4194304 ]; then | ||
| echo "You have less than 4 GiB available in your home directory; the mongodump command might fail (but it will probably succeed)." | ||
| echo "Please free up some room in ${HOME} and try again." | ||
| if yesno "Proceed despite low disk space in home directory?"; then | ||
| echo "Okay, proceeding despite low disk space in home directory..." | ||
| else | ||
| exit 1 | ||
| fi | ||
| fi | ||
|
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| echo | ||
| echo "Script does not need to be run as root; it uses sudo when root permissions are needed." | ||
| echo "If you get prompted for your sudo password, please enter it now:" | ||
| sudo id >/dev/null | ||
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| echo | ||
| echo "*** Ensuring Mongo PPA is available ***" | ||
| echo | ||
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| # Mongo 3.6 release signing key: 58712A2291FA4AD5 | ||
| gpg --keyserver keys.gnupg.net --recv-keys 58712A2291FA4AD5 | ||
| gpg --export 58712A2291FA4AD5 | sudo apt-key add - | ||
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| echo | ||
| echo "*** Dumping Mongo data from old installation ***" | ||
| echo | ||
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| mkdir -p ${HOME}/tmp/mongobackup | ||
| mongodump -o ${HOME}/tmp/mongobackup | ||
| RETCODE=$? | ||
| if [ $RETCODE -ne 0 ]; then | ||
| echo "Mongodump failed; not proceeding with destructive operations" | ||
| exit $RETCODE | ||
| fi | ||
|
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||
| echo | ||
| echo "*** Downloading Mongo 3.6 packages but not installing (yet) ***" | ||
| echo | ||
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| echo "deb [ arch=amd64 ] https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.6 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.6.list | ||
| sudo apt update | ||
| sudo apt install mongodb-org -dy | ||
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| echo | ||
| echo "*** Shutting down old Mongo server ***" | ||
| echo | ||
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| sudo systemctl stop mongodb | ||
| sudo systemctl mask mongodb | ||
| sudo systemctl daemon-reload | ||
| # "mask" means "do not allow this service to be started, ever". | ||
| # This is because the mongodb-org packages install a service called "mongod", | ||
| # and we don't want "mongod" and "mongodb" to try to run at the same time. | ||
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| # Move the mongodb 2.6 data out of the way instead of deleting it (for safety) | ||
| sudo mv /var/lib/mongodb /var/lib/mongodb-mmapi | ||
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| echo | ||
| echo "*** Installing new Mongo server ***" | ||
| echo | ||
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| sudo apt install mongodb-org -y | ||
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| echo "Running systemctl daemon-reload" | ||
| sudo systemctl daemon-reload | ||
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| echo | ||
| echo "*** Running mongorestore into newly-installed server ***" | ||
| echo | ||
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| isRunning() { | ||
| serviceName=$1 | ||
| if [ -z "$serviceName" ]; then | ||
| return 1 | ||
| fi | ||
| activestate=$(systemctl show -p ActiveState "$serviceName") | ||
| substate=$(systemctl show -p SubState "$serviceName") | ||
| if [ "$activestate" = "ActiveState=active" -a "$substate" = "SubState=running" ]; then | ||
| # In Bash scripting, 0 means true and non-zero means false | ||
| return 0 | ||
| else | ||
| return 1 | ||
| fi | ||
| } | ||
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| sudo service mongod start | ||
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| while ! isRunning mongod | ||
| do | ||
| echo "Waiting for mongod service to start running..." | ||
| sleep 1 | ||
| done | ||
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| mongorestore ${HOME}/tmp/mongobackup | ||
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| echo "" | ||
| echo "*** SUCCESS! ***" | ||
| echo "" | ||
| echo "Now verify that all the data is still there." | ||
| echo "Once you're confident, you can safely delete /var/lib/mongodb-mmapi and ${HOME}/tmp/mongobackup" | ||
| echo "" |