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oCHRISodhurley
oCHRISo
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dhurley
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Fix upgrade v2 to v3 (#1056)
* Update preinstall.sh extract config_dirs and instance groups if present * Update preinstall.sh Updating output messages * Update preinstall.sh Remove collector config as it is generated at runtime * Update preinstall.sh Added check for nginx-agent command being present for improved debugging to see if existing version of agent is present or not * Update preinstall.sh Check for >1 instance group, as an instance can join only one Config Sync Group at a time * Update preinstall.sh Remove >1 check as any value is considered to be a single config sync group * Update scripts/packages/preinstall.sh Co-authored-by: Donal Hurley <[email protected]> * Update scripts/packages/preinstall.sh Co-authored-by: Donal Hurley <[email protected]> --------- Co-authored-by: Donal Hurley <[email protected]>
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‎scripts/packages/preinstall.sh

Lines changed: 61 additions & 44 deletions
Original file line numberDiff line numberDiff line change
@@ -4,7 +4,7 @@ set -e
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# Copyright (C) Nginx, Inc. 2022.
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#
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# Description:
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# NGINX Agent install script for downloading the NGINX Agent package from the appropriate repository
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# NGINX Agent pre install script
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#
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################################
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###### Default variables
@@ -44,64 +44,78 @@ ensure_sudo() {
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}
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update_config_file() {
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# Check for existing agent binary and version
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echo "Checking what version of NGINX Agent is already installed"
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check_version="nginx-agent --version"
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nginx_agent_version=$($check_version 2>&1) || true
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if [ -z "${nginx_agent_version##nginx-agent version v2*}" ]; then
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echo "Updating NGINX Agent V2 configuration to V3 configuration"
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echo "Backing up NGINX Agent V2 configuration to /etc/nginx-agent/nginx-agent-v2-backup.conf"
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cp $AGENT_CONFIG_FILE /etc/nginx-agent/nginx-agent-v2-backup.conf
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v2_config_file=$AGENT_CONFIG_FILE
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v3_config_file=$AGENT_CONFIG_FILE
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echo "NGINX Agent server host should be ${NGINX_ONE_HOST}"
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if grep -q "$NGINX_ONE_HOST" ${v2_config_file}; then
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if command -v nginx-agent >/dev/null 2>&1; then
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nginx_agent_version=$(nginx-agent -v 2>&1)
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echo "Existing NGINX Agent version: $nginx_agent_version"
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else
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echo "No existing NGINX Agent installation found, skipping migration"
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return 0
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fi
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# Only proceed if it's v2
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if echo "$nginx_agent_version" | grep -qE '^nginx-agent version v2'; then
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echo "Migrating NGINX Agent configuration from V2 to V3 format"
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# Backup v2 config if present
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if [ -f "$AGENT_CONFIG_FILE" ]; then
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echo "Backing up existing NGINX Agent V2 configuration to $AGENT_CONFIG_FILE.v2-backup"
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cp -v "$AGENT_CONFIG_FILE" "$AGENT_CONFIG_FILE.v2-backup" \
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|| err_exit "Failed to back up v2 config"
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else
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echo "No existing NGINX Agent V2 config file found, skipping backup"
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fi
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v2_config_file="$AGENT_CONFIG_FILE"
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v3_config_file="$AGENT_CONFIG_FILE"
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echo "Verifying configured NGINX One host: ${NGINX_ONE_HOST}"
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if [ -f "$v2_config_file" ] && grep -q "$NGINX_ONE_HOST" "$v2_config_file"; then
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echo "NGINX Agent is configured to connect to NGINX One"
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else
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echo "${RED_COLOUR}Previous version of NGINX Agent was not configured to connect to NGINX One. Stopping upgrade${NO_COLOUR}"
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exit 1
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else
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err_exit "Upgrade aborted: existing NGINX Agent V2 is not configured for NGINX One"
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fi
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token=`grep "token:" "${v2_config_file}"`
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token=`echo $token | cut -d ":" -f 2 | xargs`
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instance_group=`grep "instance_group:" "${AGENT_DYNAMIC_CONFIG_FILE}"`
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instance_group=`echo $instance_group | cut -d ":" -f 2 | xargs`
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labels=""
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if [ -n "${instance_group}" ]; then
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echo "Adding config sync group to NGINX Agent configuration"
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# Extract token
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if token_line=$(grep "token:" "$v2_config_file"); then
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token=$(echo "$token_line" | cut -d ":" -f 2 | xargs)
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else
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err_exit "Upgrade aborted: no token found in v2 config"
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fi
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# Extract instance_group if present
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instance_group=""
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if [ -f "$AGENT_DYNAMIC_CONFIG_FILE" ] && instance_line=$(grep "instance_group:" "$AGENT_DYNAMIC_CONFIG_FILE"); then
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instance_group=$(echo "$instance_line" | cut -d ":" -f 2 | xargs)
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echo "Migrating existing Config Sync Group: $instance_group"
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labels="
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labels:
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config-sync-group: ${instance_group}
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"
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else
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labels=""
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fi
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config_dirs=`grep "config_dirs:" "${v2_config_file}"`
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config_dirs=`echo $config_dirs | cut -d "\"" -f 2`
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# Extract config_dirs if present
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config_dirs=""
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if config_line=$(grep "config_dirs:" "$v2_config_file"); then
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config_dirs=$(echo "$config_line" | cut -d '"' -f 2)
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fi
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allowed_directories=""
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IFS=":"
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for config_dir in $config_dirs; do
89-
allowed_directories="${allowed_directories}\n - ${config_dir}"
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allowed_directories="${allowed_directories}\n - ${config_dir}"
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done
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allowed_directories="${allowed_directories}\n - /var/log/nginx"
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echo "Writing new v3 configuration to $v3_config_file"
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v3_config_contents="
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#
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# /etc/nginx-agent/nginx-agent.conf
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#
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# Configuration file for NGINX Agent.
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#
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log:
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# set log level (error, info, debug; default \"info\")
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level: info
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# set log path. if empty, don't log to file.
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path: /var/log/nginx-agent/
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allowed_directories: ${allowed_directories}
@@ -114,9 +128,12 @@ command:
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token: ${token}
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tls:
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skip_verify: false
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"
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echo "${v3_config_contents}" > $v3_config_file
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"
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echo "$v3_config_contents" > "$v3_config_file" \
134+
|| err_exit "Failed to write v3 config"
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else
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echo "Existing NGINX Agent version is not v2, skipping config migration"
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fi
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}
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