added functionality to synchronize IOS image files
This commit is contained in:
12
README.md
12
README.md
@@ -14,15 +14,17 @@ License, see [below](#license)
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sync-router
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-----------
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Shell scripts used to synchronize the current Cisco startup configuration and
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DHCP static lease files with with a GIT repository. This scripts assumes one
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(git-managed) subdirectory per router. It performs the following operations when
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invoked:
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Shell scripts used to synchronize the current Cisco startup configuration, IOS
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images and DHCP static lease files with with a GIT repository. This scripts
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assumes one (git-managed) subdirectory per router. It performs the following
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operations when invoked:
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- copy Cisco startup-config using scp and add to next commit
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- synchronize the IOS images in the git repository and update the startup-
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config accordingly
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- update the header of modified DHCP static lease files, upload them using
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using scp and add them to the next commit
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- restart Cisco DHCP service after updating DHCP static lease files
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- copy Cisco running-config using scp and add to next commit
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- commit changes to the git repository
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I use this script to keep the configuration of my cisco router(s) in a GIT
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113
sync-router
113
sync-router
@@ -6,9 +6,11 @@
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# them using using scp and add them to the next commit
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# - restart Cisco DHCP service after updating static lease files
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# - copy Cisco startup-config using scp and add to next commit
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# - update IOS image files on the router when checked in to the
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# repository, update startup-config file accordingly on router
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# - commit changes to the git repository
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#
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# Version 1.0, latest version at: https://gitlab.lindenaar.net/scripts/cisco
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# Version 1.1, latest version at: https://gitlab.lindenaar.net/scripts/cisco
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#
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# Copyright (c) 2016 Frederik Lindenaar
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#
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@@ -25,22 +27,73 @@
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### Configuration ###
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router=`basename \`dirname $0 | pwd\`` # name of router - based on directory
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syncfiles=dhcp-\* # list/pattern of dhcp lease files
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fileto=flash: # location of dhcp lease files on cisco
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dhcpfiles=dhcp-\* # list/pattern of dhcp lease files
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imagefiles=c??00-universalk9-mz.SPA.\* # list/pattern of IOS image files
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fileto=flash # location of dhcp/IOS files on cisco
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### Implementation ###
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echo updating with $router
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# Support function to download a file from the router
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# parameters: $1 - filename to be copied and $2 - (optional) target filename
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# when no target filename is provided the source file will be downloaded to the
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# current directory with the same name. Adds downloaded file to git changeset
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router_file_download() {
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fromfile=${1?ERROR: at least one filename is required to copy from router}
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tofile=${2:-$fromfile}
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filesrc=$fileto
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if [ "$fromfile" == startup-config ]; then
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filesrc=nvram
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fi
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echo downloading $tofile from router $filesrc
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scp -q $router:$filesrc:$fromfile $tofile
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git add $tofile
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}
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# Support function to upload a file to the router
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# parameters: $1 - filename to be copied and $2 - (optional) target filename
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# when a target filename is provided the source file will be moved to the target
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# file after uploading and the target file is added to the git changeset
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router_file_upload() {
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fromfile=${1?ERROR: at least one filename is required to copy to router}
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tofile=${2:-$fromfile}
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filedst=$fileto
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if [ "$fromfile" == startup-config ]; then
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filedst=nvram
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fi
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echo uploading new/updated $tofile to router $filedst
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scp -q $fromfile $router:$filedst:$tofile
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if [ "$fromfile" != "$tofile" ]; then
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mv $fromfile $tofile
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git add $tofile
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fi
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}
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# Support function to remove a file from the router
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# parameters: $1 - filename to be removed
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router_file_remove() {
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delfile=${1?ERROR: need a filename to remove from router}
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echo removing $delfile as it is no longer in the repository
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ssh -q $router "delete /force $fileto:$delfile"
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}
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# Fetch the start-up configuration from the router
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router_file_download startup-config
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# Process the DHCP static lease files that have changed
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git status -s "$syncfiles" | while read status filename
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git status -s "$dhcpfiles" | while read status filename token newfilename
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do
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case $status in
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\?\?)
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echo skipping $filename as it is not yet added to the repository
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;;
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D)
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echo removing $filename as it is no longer in the repository
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ssh -q $router "delete /force $fileto$filename"
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router_file_remove $filename
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;;
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R)
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router_file_remove $filename
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router_file_upload $newfilename
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;;
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A |M)
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echo updating and uploading modified file $filename
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@@ -60,9 +113,7 @@ do
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esac
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done
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tail +3 $filename >> .$filename.$$.tmp
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scp -q .$filename.$$.tmp $router:$fileto$filename
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mv .$filename.$$.tmp $filename
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git add $filename
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router_file_upload .$filename.$$.tmp $filename
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;;
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*)
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echo unsupported git status "$status", aborting
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@@ -72,7 +123,7 @@ do
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done
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# Restart the DHCP service on the router if any of the dhcp files changed
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if git status -s "$syncfiles" | egrep -q ^[MAD]; then
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if git status -s "$dhcpfiles" | egrep -q ^[MAD]; then
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echo restarting dhcp service
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cat << EOT | ssh -q $router
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configure terminal
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@@ -83,10 +134,42 @@ exit
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EOT
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fi
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# Fetch the current start-up configuration and add it to the repository
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scp -q $router:startup-config .
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git diff startup-config
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git add startup-config
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# and commit the changes (or unadd new configuration when commit is aborted)
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# Process the IOS image files that have changed
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git status -s "$imagefiles" | while read status filename token newfilename
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do
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case $status in
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\?\?)
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echo skipping $filename as it is not yet added to the repository
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;;
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R)
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router_file_remove $filename
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router_file_upload $newfilename
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;;
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D)
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router_file_remove $filename
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;;
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A |M)
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router_file_upload $filename
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;;
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*)
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echo unsupported git status "$status", aborting
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exit 1
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;;
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esac
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done
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# Update the boot images in the startup-config file if we're updating any images
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if git status -s "$imagefiles" | egrep -q ^[MADR]; then
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fgrep -n "boot system $fileto" startup-config | cut -d: -f1 > .startup-config.$$.lines
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head -$[ `head -1 .startup-config.$$.lines` -1 ] startup-config > .startup-config.$$
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git ls-files $imagefiles | sort -r | sed "s/^/boot system $fileto /g" >> .startup-config.$$
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tail +$[ `tail -1 .startup-config.$$.lines` +1 ] startup-config >> .startup-config.$$
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rm .startup-config.$$.lines
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router_file_upload .startup-config.$$ startup-config
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fi
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# show what has changed in the startup config and commit to the repository
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git diff --cached startup-config
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git commit || git reset HEAD startup-config
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